Google Git
Sign in
bazel / bazel / 812a9cea07ea6c6175ba8664ee5b6f48cb04c87c / . / src / test / java / com / google / devtools / build / skyframe / ParallelEvaluatorTest.java
blob: a9ad0abafe1b4d5466e8d757dbc025c530a19147 [file] [log] [blame]
// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.skyframe;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;
import static com.google.devtools.build.lib.testutil.EventIterableSubjectFactory.assertThatEvents;
import static com.google.devtools.build.skyframe.EvaluationResultSubjectFactory.assertThatEvaluationResult;
import static com.google.devtools.build.skyframe.GraphTester.CONCATENATE;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.fail;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Interner;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.google.common.eventbus.EventBus;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.common.util.concurrent.SettableFuture;
import com.google.common.util.concurrent.Uninterruptibles;
import com.google.devtools.build.lib.concurrent.AbstractQueueVisitor;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.events.Event;
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.events.EventKind;
import com.google.devtools.build.lib.events.ExtendedEventHandler;
import com.google.devtools.build.lib.events.ExtendedEventHandler.Postable;
import com.google.devtools.build.lib.events.Reporter;
import com.google.devtools.build.lib.events.StoredEventHandler;
import com.google.devtools.build.lib.testutil.TestThread;
import com.google.devtools.build.lib.testutil.TestUtils;
import com.google.devtools.build.skyframe.GraphTester.StringValue;
import com.google.devtools.build.skyframe.NotifyingHelper.EventType;
import com.google.devtools.build.skyframe.NotifyingHelper.Listener;
import com.google.devtools.build.skyframe.NotifyingHelper.Order;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Supplier;
import javax.annotation.Nullable;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mockito;
/**
* Tests for {@link ParallelEvaluator}.
*/
@RunWith(JUnit4.class)
public class ParallelEvaluatorTest {
private static final SkyFunctionName CHILD_TYPE = SkyFunctionName.createHermetic("child");
private static final SkyFunctionName PARENT_TYPE = SkyFunctionName.createHermetic("parent");
protected ProcessableGraph graph;
protected IntVersion graphVersion = IntVersion.of(0);
protected GraphTester tester = new GraphTester();
private StoredEventHandler storedEventHandler;
private DirtyTrackingProgressReceiver revalidationReceiver =
new DirtyTrackingProgressReceiver(null);
@Before
public void initializeReporter() {
storedEventHandler = new StoredEventHandler();
}
@After
public void assertNoTrackedErrors() {
TrackingAwaiter.INSTANCE.assertNoErrors();
}
private ParallelEvaluator makeEvaluator(
ProcessableGraph graph,
ImmutableMap<SkyFunctionName, ? extends SkyFunction> builders,
boolean keepGoing,
EventFilter storedEventFilter) {
Version oldGraphVersion = graphVersion;
graphVersion = graphVersion.next();
return new ParallelEvaluator(
graph,
oldGraphVersion,
builders,
storedEventHandler,
new MemoizingEvaluator.EmittedEventState(),
storedEventFilter,
ErrorInfoManager.UseChildErrorInfoIfNecessary.INSTANCE,
keepGoing,
revalidationReceiver,
GraphInconsistencyReceiver.THROWING,
() -> AbstractQueueVisitor.createExecutorService(200, "test-pool"),
new SimpleCycleDetector(),
EvaluationVersionBehavior.MAX_CHILD_VERSIONS);
}
private ParallelEvaluator makeEvaluator(ProcessableGraph graph,
ImmutableMap<SkyFunctionName, ? extends SkyFunction> builders, boolean keepGoing) {
return makeEvaluator(graph, builders, keepGoing,
InMemoryMemoizingEvaluator.DEFAULT_STORED_EVENT_FILTER);
}
/** Convenience method for eval-ing a single value. */
protected SkyValue eval(boolean keepGoing, SkyKey key) throws InterruptedException {
return eval(keepGoing, ImmutableList.of(key)).get(key);
}
protected <T extends SkyValue> EvaluationResult<T> eval(boolean keepGoing, SkyKey... keys)
throws InterruptedException {
return eval(keepGoing, ImmutableList.copyOf(keys));
}
protected <T extends SkyValue> EvaluationResult<T> eval(boolean keepGoing, Iterable<SkyKey> keys)
throws InterruptedException {
ParallelEvaluator evaluator = makeEvaluator(graph, tester.getSkyFunctionMap(), keepGoing);
return evaluator.eval(keys);
}
protected ErrorInfo evalValueInError(SkyKey key) throws InterruptedException {
return eval(true, ImmutableList.of(key)).getError(key);
}
protected GraphTester.TestFunction set(String name, String value) {
return tester.set(name, new StringValue(value));
}
@Test
public void smoke() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a");
set("b", "b");
tester.getOrCreate("ab").addDependency("a").addDependency("b").setComputedValue(CONCATENATE);
StringValue value = (StringValue) eval(false, GraphTester.toSkyKey("ab"));
assertThat(value.getValue()).isEqualTo("ab");
assertThat(storedEventHandler.getEvents()).isEmpty();
assertThat(storedEventHandler.getPosts()).isEmpty();
}
@Test
public void enqueueDoneFuture() throws Exception {
final SkyKey parentKey = GraphTester.toSkyKey("parentKey");
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
SettableFuture<SkyValue> future = SettableFuture.create();
future.set(new StringValue("good"));
env.dependOnFuture(future);
assertThat(env.valuesMissing()).isFalse();
try {
return future.get();
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
graph = new InMemoryGraphImpl();
EvaluationResult<StringValue> result = eval(/*keepGoing=*/ false, ImmutableList.of(parentKey));
assertThat(result.hasError()).isFalse();
assertThat(result.get(parentKey)).isEqualTo(new StringValue("good"));
}
@Test
public void enqueueBadFuture() throws Exception {
final SkyKey parentKey = GraphTester.toSkyKey("parentKey");
final CountDownLatch doneLatch = new CountDownLatch(1);
final ListeningExecutorService executor =
MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(1));
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
private ListenableFuture<SkyValue> future;
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
if (future == null) {
future =
executor.submit(
() -> {
doneLatch.await();
throw new UnsupportedOperationException();
});
env.dependOnFuture(future);
assertThat(env.valuesMissing()).isTrue();
return null;
}
assertThat(future.isDone()).isTrue();
ExecutionException expected =
assertThrows(ExecutionException.class, () -> future.get());
assertThat(expected.getCause()).isInstanceOf(UnsupportedOperationException.class);
return new StringValue("Caught!");
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
graph =
NotifyingHelper.makeNotifyingTransformer(
new Listener() {
@Override
public void accept(SkyKey key, EventType type, Order order, Object context) {
// NodeEntry.addExternalDep is called as part of bookkeeping at the end of
// AbstractParallelEvaluator.Evaluate#run.
if (key == parentKey && type == EventType.ADD_EXTERNAL_DEP) {
doneLatch.countDown();
}
}
})
.transform(new InMemoryGraphImpl());
EvaluationResult<StringValue> result = eval(/*keepGoing=*/ false, ImmutableList.of(parentKey));
assertThat(result.hasError()).isFalse();
assertThat(result.get(parentKey)).isEqualTo(new StringValue("Caught!"));
}
@Test
public void dependsOnKeyAndFuture() throws Exception {
final SkyKey parentKey = GraphTester.toSkyKey("parentKey");
final SkyKey childKey = GraphTester.toSkyKey("childKey");
final CountDownLatch doneLatch = new CountDownLatch(1);
tester.getOrCreate(childKey).setConstantValue(new StringValue("child"));
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
private SettableFuture<SkyValue> future;
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
SkyValue child = env.getValue(childKey);
if (future == null) {
assertThat(child).isNull();
future = SettableFuture.create();
env.dependOnFuture(future);
assertThat(env.valuesMissing()).isTrue();
new Thread(
() -> {
try {
doneLatch.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
future.set(new StringValue("future"));
})
.start();
return null;
}
assertThat(child).isEqualTo(new StringValue("child"));
assertThat(future.isDone()).isTrue();
try {
assertThat(future.get()).isEqualTo(new StringValue("future"));
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
return new StringValue("All done!");
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
graph =
NotifyingHelper.makeNotifyingTransformer(
new Listener() {
@Override
public void accept(SkyKey key, EventType type, Order order, Object context) {
if (key == childKey && type == EventType.SET_VALUE) {
doneLatch.countDown();
}
}
})
.transform(new InMemoryGraphImpl());
EvaluationResult<StringValue> result = eval(/*keepGoing=*/ false, ImmutableList.of(parentKey));
assertThat(result.hasError()).isFalse();
assertThat(result.get(parentKey)).isEqualTo(new StringValue("All done!"));
}
/**
* Test interruption handling when a long-running SkyFunction gets interrupted.
*/
@Test
public void interruptedFunction() throws Exception {
runInterruptionTest(new SkyFunctionFactory() {
@Override
public SkyFunction create(final Semaphore threadStarted, final String[] errorMessage) {
return new SkyFunction() {
@Override
public SkyValue compute(SkyKey key, Environment env) throws InterruptedException {
// Signal the waiting test thread that the evaluator thread has really started.
threadStarted.release();
// Simulate a SkyFunction that runs for 10 seconds (this number was chosen arbitrarily).
// The main thread should interrupt it shortly after it got started.
Thread.sleep(10 * 1000);
// Set an error message to indicate that the expected interruption didn't happen.
// We can't use Assert.fail(String) on an async thread.
errorMessage[0] = "SkyFunction should have been interrupted";
return null;
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
};
}
});
}
/**
* Test interruption handling when the Evaluator is in-between running SkyFunctions.
*
* <p>This is the point in time after a SkyFunction requested a dependency which is not yet built
* so the builder returned null to the Evaluator, and the latter is about to schedule evaluation
* of the missing dependency but gets interrupted before the dependency's SkyFunction could start.
*/
@Test
public void interruptedEvaluatorThread() throws Exception {
runInterruptionTest(
new SkyFunctionFactory() {
@Override
public SkyFunction create(final Semaphore threadStarted, final String[] errorMessage) {
return new SkyFunction() {
// No need to synchronize access to this field; we always request just one more
// dependency, so it's only one SkyFunction running at any time.
private int valueIdCounter = 0;
@Override
public SkyValue compute(SkyKey key, Environment env) throws InterruptedException {
// Signal the waiting test thread that the Evaluator thread has really started.
threadStarted.release();
// Keep the evaluator busy until the test's thread gets scheduled and can
// interrupt the Evaluator's thread.
env.getValue(GraphTester.toSkyKey("a" + valueIdCounter++));
// This method never throws InterruptedException, therefore it's the responsibility
// of the Evaluator to detect the interrupt and avoid calling subsequent
// SkyFunctions.
return null;
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
};
}
});
}
@Test
public void interruptedEvaluatorThreadAfterEnqueueBeforeWaitForCompletionAndConstructResult()
throws InterruptedException {
// This is a regression test for a crash bug in
// AbstractExceptionalParallelEvaluator#doMutatingEvaluation in a very specific window of time
// between enqueueing one top-level node for evaluation and checking if another top-level node
// is done.
// When we have two top-level nodes, A and B,
SkyKey keyA = GraphTester.toSkyKey("a");
SkyKey keyB = GraphTester.toSkyKey("b");
// And rig the graph and node entries, such that B's addReverseDepAndCheckIfDone waits for A to
// start computing and then tries to observe an interrupt (which will happen on the calling
// thread, aka the main Skyframe evaluation thread),
CountDownLatch keyAStartedComputingLatch = new CountDownLatch(1);
CountDownLatch keyBAddReverseDepAndCheckIfDoneLatch = new CountDownLatch(1);
NodeEntry nodeEntryB = Mockito.mock(NodeEntry.class);
AtomicBoolean keyBAddReverseDepAndCheckIfDoneInterrupted = new AtomicBoolean(false);
Mockito.doAnswer(
invocation -> {
keyAStartedComputingLatch.await();
keyBAddReverseDepAndCheckIfDoneLatch.countDown();
try {
Thread.sleep(TestUtils.WAIT_TIMEOUT_MILLISECONDS);
throw new IllegalStateException("shouldn't get here");
} catch (InterruptedException e) {
keyBAddReverseDepAndCheckIfDoneInterrupted.set(true);
throw e;
}
})
.when(nodeEntryB)
.addReverseDepAndCheckIfDone(Mockito.eq(null));
graph = new InMemoryGraphImpl() {
@Override
protected NodeEntry newNodeEntry(SkyKey key) {
return key.equals(keyB) ? nodeEntryB : super.newNodeEntry(key);
}
};
// And A's SkyFunction tries to observe an interrupt after it starts computing,
AtomicBoolean keyAComputeInterrupted = new AtomicBoolean(false);
tester.getOrCreate(keyA).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
keyAStartedComputingLatch.countDown();
try {
Thread.sleep(TestUtils.WAIT_TIMEOUT_MILLISECONDS);
throw new IllegalStateException("shouldn't get here");
} catch (InterruptedException e) {
keyAComputeInterrupted.set(true);
throw e;
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
// And we have a dedicated thread that kicks off the evaluation of A and B together (in that
// order).
TestThread evalThread =
new TestThread(
() ->
assertThrows(
InterruptedException.class, () -> eval(/*keepGoing=*/ true, keyA, keyB)));
// Then when we start that thread,
evalThread.start();
// We (the thread running the test) are able to observe that B's addReverseDepAndCheckIfDone has
// just been called (implying that A has started to be computed).
assertThat(
keyBAddReverseDepAndCheckIfDoneLatch.await(
TestUtils.WAIT_TIMEOUT_SECONDS, TimeUnit.SECONDS))
.isTrue();
// Then when we interrupt the evaluation thread,
evalThread.interrupt();
// The evaluation thread eventually terminates.
evalThread.joinAndAssertState(TestUtils.WAIT_TIMEOUT_MILLISECONDS);
// And we are able to verify both that A's SkyFunction had observed an interrupt,
assertThat(keyAComputeInterrupted.get()).isTrue();
// And also that B's addReverseDepAndCheckIfDoneInterrupted had observed an interrupt.
assertThat(keyBAddReverseDepAndCheckIfDoneInterrupted.get()).isTrue();
}
private void runPartialResultOnInterruption(boolean buildFastFirst) throws Exception {
graph = new InMemoryGraphImpl();
// Two runs for fastKey's builder and one for the start of waitKey's builder.
final CountDownLatch allValuesReady = new CountDownLatch(3);
final SkyKey waitKey = GraphTester.toSkyKey("wait");
final SkyKey fastKey = GraphTester.toSkyKey("fast");
SkyKey leafKey = GraphTester.toSkyKey("leaf");
tester.getOrCreate(waitKey).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
allValuesReady.countDown();
Thread.sleep(10000);
throw new AssertionError("Should have been interrupted");
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester.getOrCreate(fastKey).setBuilder(new ChainedFunction(null, null, allValuesReady, false,
new StringValue("fast"), ImmutableList.of(leafKey)));
tester.set(leafKey, new StringValue("leaf"));
if (buildFastFirst) {
eval(/*keepGoing=*/false, fastKey);
}
final Set<SkyKey> receivedValues = Sets.newConcurrentHashSet();
revalidationReceiver =
new DirtyTrackingProgressReceiver(
new EvaluationProgressReceiver.NullEvaluationProgressReceiver() {
@Override
public void evaluated(
SkyKey skyKey,
@Nullable SkyValue value,
Supplier<EvaluationSuccessState> evaluationSuccessState,
EvaluationState state) {
receivedValues.add(skyKey);
}
});
TestThread evalThread =
new TestThread(
() ->
assertThrows(
InterruptedException.class, () -> eval(/*keepGoing=*/ true, waitKey, fastKey)));
evalThread.start();
assertThat(allValuesReady.await(TestUtils.WAIT_TIMEOUT_SECONDS, TimeUnit.SECONDS)).isTrue();
evalThread.interrupt();
evalThread.join(TestUtils.WAIT_TIMEOUT_MILLISECONDS);
assertThat(evalThread.isAlive()).isFalse();
if (buildFastFirst) {
// If leafKey was already built, it is not reported to the receiver.
assertThat(receivedValues).containsExactly(fastKey);
} else {
// On first time being built, leafKey is registered too.
assertThat(receivedValues).containsExactly(fastKey, leafKey);
}
}
@Test
public void partialResultOnInterruption() throws Exception {
runPartialResultOnInterruption(/*buildFastFirst=*/false);
}
@Test
public void partialCachedResultOnInterruption() throws Exception {
runPartialResultOnInterruption(/*buildFastFirst=*/true);
}
/**
* Factory for SkyFunctions for interruption testing (see {@link #runInterruptionTest}).
*/
private interface SkyFunctionFactory {
/**
* Creates a SkyFunction suitable for a specific test scenario.
*
* @param threadStarted a latch which the returned SkyFunction must
* {@link Semaphore#release() release} once it started (otherwise the test won't work)
* @param errorMessage a single-element array; the SkyFunction can put a error message in it
* to indicate that an assertion failed (calling {@code fail} from async thread doesn't
* work)
*/
SkyFunction create(final Semaphore threadStarted, final String[] errorMessage);
}
/**
* Test that we can handle the Evaluator getting interrupted at various points.
*
* <p>This method creates an Evaluator with the specified SkyFunction for GraphTested.NODE_TYPE,
* then starts a thread, requests evaluation and asserts that evaluation started. It then
* interrupts the Evaluator thread and asserts that it acknowledged the interruption.
*
* @param valueBuilderFactory creates a SkyFunction which may or may not handle interruptions
* (depending on the test)
*/
private void runInterruptionTest(SkyFunctionFactory valueBuilderFactory) throws Exception {
final Semaphore threadStarted = new Semaphore(0);
final Semaphore threadInterrupted = new Semaphore(0);
final String[] wasError = new String[] { null };
final ParallelEvaluator evaluator =
makeEvaluator(
new InMemoryGraphImpl(),
ImmutableMap.of(
GraphTester.NODE_TYPE, valueBuilderFactory.create(threadStarted, wasError)),
false);
Thread t = new Thread(new Runnable() {
@Override
public void run() {
try {
evaluator.eval(ImmutableList.of(GraphTester.toSkyKey("a")));
// There's no real need to set an error here. If the thread is not interrupted then
// threadInterrupted is not released and the test thread will fail to acquire it.
wasError[0] = "evaluation should have been interrupted";
} catch (InterruptedException e) {
// This is the interrupt we are waiting for. It should come straight from the
// evaluator (more precisely, the AbstractQueueVisitor).
// Signal the waiting test thread that the interrupt was acknowledged.
threadInterrupted.release();
}
}
});
// Start the thread and wait for a semaphore. This ensures that the thread was really started.
t.start();
assertThat(threadStarted.tryAcquire(TestUtils.WAIT_TIMEOUT_MILLISECONDS, TimeUnit.MILLISECONDS))
.isTrue();
// Interrupt the thread and wait for a semaphore. This ensures that the thread was really
// interrupted and this fact was acknowledged.
t.interrupt();
assertThat(
threadInterrupted.tryAcquire(
TestUtils.WAIT_TIMEOUT_MILLISECONDS, TimeUnit.MILLISECONDS))
.isTrue();
// The SkyFunction may have reported an error.
if (wasError[0] != null) {
fail(wasError[0]);
}
// Wait for the thread to finish.
t.join(TestUtils.WAIT_TIMEOUT_MILLISECONDS);
}
@Test
public void unrecoverableError() throws Exception {
class CustomRuntimeException extends RuntimeException {}
final CustomRuntimeException expected = new CustomRuntimeException();
final SkyFunction builder = new SkyFunction() {
@Override
@Nullable
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
throw expected;
}
@Override
@Nullable
public String extractTag(SkyKey skyKey) {
return null;
}
};
final ParallelEvaluator evaluator =
makeEvaluator(
new InMemoryGraphImpl(), ImmutableMap.of(GraphTester.NODE_TYPE, builder), false);
SkyKey valueToEval = GraphTester.toSkyKey("a");
RuntimeException re =
assertThrows(RuntimeException.class, () -> evaluator.eval(ImmutableList.of(valueToEval)));
assertThat(re)
.hasMessageThat()
.contains("Unrecoverable error while evaluating node '" + valueToEval.toString() + "'");
assertThat(re).hasCauseThat().isInstanceOf(CustomRuntimeException.class);
}
@Test
public void simpleWarning() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a").setWarning("warning on 'a'");
StringValue value = (StringValue) eval(false, GraphTester.toSkyKey("a"));
assertThat(value.getValue()).isEqualTo("a");
assertThatEvents(storedEventHandler.getEvents()).containsExactly("warning on 'a'");
}
/** Regression test: events from already-done value not replayed. */
@Test
public void eventFromDoneChildRecorded() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a").setWarning("warning on 'a'");
SkyKey a = GraphTester.toSkyKey("a");
SkyKey top = GraphTester.toSkyKey("top");
tester.getOrCreate(top).addDependency(a).setComputedValue(CONCATENATE);
// Build a so that it is already in the graph.
eval(false, a);
assertThat(storedEventHandler.getEvents()).hasSize(1);
storedEventHandler.clear();
// Build top. The warning from a should be printed.
eval(false, top);
assertThat(storedEventHandler.getEvents()).hasSize(1);
storedEventHandler.clear();
// Build top again. The warning should have been stored in the value.
eval(false, top);
assertThat(storedEventHandler.getEvents()).hasSize(1);
}
@Test
public void postableFromDoneChildRecorded() throws Exception {
graph = new InMemoryGraphImpl();
Postable post = new Postable() {};
set("a", "a").setPostable(post);
SkyKey a = GraphTester.toSkyKey("a");
SkyKey top = GraphTester.toSkyKey("top");
tester.getOrCreate(top).addDependency(a).setComputedValue(CONCATENATE);
// Build a so that it is already in the graph.
eval(false, a);
assertThat(storedEventHandler.getPosts()).containsExactly(post);
storedEventHandler.clear();
// Build top. The post from a should be printed.
eval(false, top);
assertThat(storedEventHandler.getPosts()).containsExactly(post);
storedEventHandler.clear();
// Build top again. The post should have been stored in the value.
eval(false, top);
assertThat(storedEventHandler.getPosts()).containsExactly(post);
}
@Test
public void eventReportedTimely() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a").setWarning("warning on 'a'");
SkyKey a = GraphTester.toSkyKey("a");
SkyKey top = GraphTester.toSkyKey("top");
tester.getOrCreate(top).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey key, Environment env)
throws SkyFunctionException, InterruptedException {
// The event from a should already have been posted.
assertThat(storedEventHandler.getEvents()).hasSize(1);
return new StringValue("foo");
}
@Override
@Nullable
public String extractTag(SkyKey skyKey) {
return null;
}
});
// Build a so that it is already in the graph.
eval(false, a);
storedEventHandler.clear();
// Build top. The warning from a should be printed before evaluating top.
eval(false, ImmutableList.of(a, top));
assertThat(storedEventHandler.getEvents()).hasSize(1);
storedEventHandler.clear();
}
@Test
public void errorOfTopLevelTargetReported() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey a = GraphTester.toSkyKey("a");
SkyKey b = GraphTester.toSkyKey("b");
tester.getOrCreate(b).setHasError(true);
Event errorEvent = Event.error("foobar");
tester.getOrCreate(a).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey key, Environment env)
throws SkyFunctionException, InterruptedException {
try {
if (env.getValueOrThrow(b, SomeErrorException.class) == null) {
return null;
}
} catch (SomeErrorException ignored) {
// Continue silently.
}
env.getListener().handle(errorEvent);
throw new SkyFunctionException(new SomeErrorException("bazbar"), Transience.PERSISTENT) {};
}
@Override
@Nullable
public String extractTag(SkyKey skyKey) {
return null;
}
});
eval(false, a);
assertThat(storedEventHandler.getEvents()).containsExactly(errorEvent);
}
@Test
public void storedEventFilter() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey a = GraphTester.toSkyKey("a");
final AtomicBoolean evaluated = new AtomicBoolean(false);
tester.getOrCreate(a).setBuilder(new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) {
evaluated.set(true);
env.getListener().handle(Event.error(null, "boop"));
env.getListener().handle(Event.warn(null, "beep"));
return new StringValue("a");
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
ParallelEvaluator evaluator =
makeEvaluator(
graph,
tester.getSkyFunctionMap(),
/*keepGoing=*/ false,
new EventFilter() {
@Override
public boolean apply(Event event) {
return event.getKind() == EventKind.ERROR;
}
@Override
public boolean storeEventsAndPosts() {
return true;
}
});
evaluator.eval(ImmutableList.of(a));
assertThat(evaluated.get()).isTrue();
assertThat(storedEventHandler.getEvents()).hasSize(2);
assertThatEvents(storedEventHandler.getEvents()).containsExactly("boop", "beep");
storedEventHandler.clear();
evaluator = makeEvaluator(graph, tester.getSkyFunctionMap(), /*keepGoing=*/ false);
evaluated.set(false);
evaluator.eval(ImmutableList.of(a));
assertThat(evaluated.get()).isFalse();
assertThatEvents(storedEventHandler.getEvents()).containsExactly("boop");
}
@Test
public void shouldCreateErrorValueWithRootCause() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a");
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(parentErrorKey).addDependency("a").addDependency(errorKey)
.setComputedValue(CONCATENATE);
tester.getOrCreate(errorKey).setHasError(true);
ErrorInfo error = evalValueInError(parentErrorKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void shouldBuildOneTarget() throws Exception {
graph = new InMemoryGraphImpl();
set("a", "a");
set("b", "b");
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
SkyKey errorFreeKey = GraphTester.toSkyKey("ab");
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(parentErrorKey).addDependency(errorKey).addDependency("a")
.setComputedValue(CONCATENATE);
tester.getOrCreate(errorKey).setHasError(true);
tester.getOrCreate(errorFreeKey).addDependency("a").addDependency("b")
.setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(true, parentErrorKey, errorFreeKey);
ErrorInfo error = result.getError(parentErrorKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
StringValue abValue = result.get(errorFreeKey);
assertThat(abValue.getValue()).isEqualTo("ab");
}
@Test
public void catastropheHaltsBuild_KeepGoing_KeepEdges() throws Exception {
catastrophicBuild(true, true);
}
@Test
public void catastropheHaltsBuild_KeepGoing_NoKeepEdges() throws Exception {
catastrophicBuild(true, false);
}
@Test
public void catastropheInBuild_NoKeepGoing_KeepEdges() throws Exception {
catastrophicBuild(false, true);
}
private void catastrophicBuild(boolean keepGoing, boolean keepEdges) throws Exception {
graph = new InMemoryGraphImpl(keepEdges);
SkyKey catastropheKey = GraphTester.toSkyKey("catastrophe");
SkyKey otherKey = GraphTester.toSkyKey("someKey");
final Exception catastrophe = new SomeErrorException("bad");
tester
.getOrCreate(catastropheKey)
.setBuilder(
new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
throw new SkyFunctionException(catastrophe, Transience.PERSISTENT) {
@Override
public boolean isCatastrophic() {
return true;
}
};
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester.getOrCreate(otherKey).setBuilder(new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
new CountDownLatch(1).await();
throw new RuntimeException("can't get here");
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(catastropheKey).setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(keepGoing, topKey, otherKey);
ErrorInfo error = result.getError(topKey);
assertThat(error.getRootCauses().toList()).containsExactly(catastropheKey);
if (keepGoing) {
assertThat(result.getCatastrophe()).isSameInstanceAs(catastrophe);
}
}
@Test
public void incrementalCycleWithCatastropheAndFailedBubbleUp() throws Exception {
SkyKey topKey = GraphTester.toSkyKey("top");
// Comes alphabetically before "top".
SkyKey cycleKey = GraphTester.toSkyKey("cycle");
SkyKey catastropheKey = GraphTester.toSkyKey("catastrophe");
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
StringValue topValue = new StringValue("top");
tester
.getOrCreate(topKey)
.setBuilder(
new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
env.getValues(ImmutableList.of(cycleKey));
return env.valuesMissing() ? null : topValue;
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(cycleKey)
.setBuilder(
new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
env.getValues(ImmutableList.of(cycleKey, catastropheKey));
Preconditions.checkState(env.valuesMissing());
return null;
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(catastropheKey)
.setBuilder(
new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
throw new SkyFunctionException(
new SomeErrorException("catastrophe"), Transience.TRANSIENT) {
@Override
public boolean isCatastrophic() {
return true;
}
};
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
EvaluationResult<StringValue> result = eval(/*keepGoing=*/ true, ImmutableList.of(topKey));
assertThatEvaluationResult(result).hasError();
assertThatEvaluationResult(result)
.hasErrorEntryForKeyThat(topKey)
.hasCycleInfoThat()
.containsExactly(new CycleInfo(ImmutableList.of(topKey), ImmutableList.of(cycleKey)));
}
@Test
public void parentFailureDoesntAffectChild() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentKey).setHasError(true);
SkyKey childKey = GraphTester.toSkyKey("child");
set("child", "onions");
tester.getOrCreate(parentKey).addDependency(childKey).setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, parentKey, childKey);
// Child is guaranteed to complete successfully before parent can run (and fail),
// since parent depends on it.
StringValue childValue = result.get(childKey);
assertThat(childValue).isNotNull();
assertThat(childValue.getValue()).isEqualTo("onions");
ErrorInfo error = result.getError(parentKey);
assertThat(error).isNotNull();
assertThat(error.getRootCauses().toList()).containsExactly(parentKey);
}
@Test
public void newParentOfErrorShouldHaveError() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(errorKey).setHasError(true);
ErrorInfo error = evalValueInError(errorKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
SkyKey parentKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentKey).addDependency("error").setComputedValue(CONCATENATE);
error = evalValueInError(parentKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void errorTwoLevelsDeep() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(errorKey).setHasError(true);
tester.getOrCreate("mid").addDependency(errorKey).setComputedValue(CONCATENATE);
tester.getOrCreate(parentKey).addDependency("mid").setComputedValue(CONCATENATE);
ErrorInfo error = evalValueInError(parentKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void valueNotUsedInFailFastErrorRecovery() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey recoveryKey = GraphTester.toSkyKey("midRecovery");
SkyKey badKey = GraphTester.toSkyKey("bad");
tester.getOrCreate(topKey).addDependency(recoveryKey).setComputedValue(CONCATENATE);
tester.getOrCreate(recoveryKey).addErrorDependency(badKey, new StringValue("i recovered"))
.setComputedValue(CONCATENATE);
tester.getOrCreate(badKey).setHasError(true);
EvaluationResult<SkyValue> result = eval(/*keepGoing=*/true, ImmutableList.of(recoveryKey));
assertThat(result.errorMap()).isEmpty();
assertThatEvaluationResult(result).hasNoError();
assertThat(result.get(recoveryKey)).isEqualTo(new StringValue("i recovered"));
result = eval(/*keepGoing=*/false, ImmutableList.of(topKey));
assertThatEvaluationResult(result).hasError();
assertThat(result.keyNames()).isEmpty();
assertThat(result.errorMap()).hasSize(1);
assertThat(result.getError(topKey).getException()).isNotNull();
}
@Test
public void multipleRootCauses() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey errorKey2 = GraphTester.toSkyKey("error2");
SkyKey errorKey3 = GraphTester.toSkyKey("error3");
tester.getOrCreate(errorKey).setHasError(true);
tester.getOrCreate(errorKey2).setHasError(true);
tester.getOrCreate(errorKey3).setHasError(true);
tester.getOrCreate("mid").addDependency(errorKey).addDependency(errorKey2)
.setComputedValue(CONCATENATE);
tester.getOrCreate(parentKey)
.addDependency("mid").addDependency(errorKey2).addDependency(errorKey3)
.setComputedValue(CONCATENATE);
ErrorInfo error = evalValueInError(parentKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey, errorKey2, errorKey3);
}
@Test
public void rootCauseWithNoKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(errorKey).setHasError(true);
tester.getOrCreate("mid").addDependency(errorKey).setComputedValue(CONCATENATE);
tester.getOrCreate(parentKey).addDependency("mid").setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(false, ImmutableList.of(parentKey));
Map.Entry<SkyKey, ErrorInfo> error = Iterables.getOnlyElement(result.errorMap().entrySet());
assertThat(error.getKey()).isEqualTo(parentKey);
assertThat(error.getValue().getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void errorBubblesToParentsOfTopLevelValue() throws Exception {
SkyKey parentKey = GraphTester.toSkyKey("parent");
SkyKey errorKey = GraphTester.toSkyKey("error");
CountDownLatch latch = new CountDownLatch(1);
graph =
new NotifyingHelper.NotifyingProcessableGraph(
new InMemoryGraphImpl(),
(key, type, order, context) -> {
if (key.equals(errorKey)
&& parentKey.equals(context)
&& type == EventType.ADD_REVERSE_DEP
&& order == Order.AFTER) {
latch.countDown();
}
});
tester.getOrCreate(errorKey).setBuilder(new ChainedFunction(null, /*waitToFinish=*/latch, null,
false, /*value=*/null, ImmutableList.<SkyKey>of()));
tester.getOrCreate(parentKey).addDependency(errorKey).setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval( /*keepGoing=*/false,
ImmutableList.of(parentKey, errorKey));
assertWithMessage(result.toString()).that(result.errorMap().size()).isEqualTo(2);
}
@Test
public void noKeepGoingAfterKeepGoingFails() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
SkyKey parentKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentKey).addDependency(errorKey);
ErrorInfo error = evalValueInError(parentKey);
assertThat(error.getRootCauses().toList()).containsExactly(errorKey);
SkyKey[] list = { parentKey };
EvaluationResult<StringValue> result = eval(false, list);
ErrorInfo errorInfo = result.getError();
assertThat(errorInfo.getRootCauses().toList()).containsExactly(errorKey);
assertThat(errorInfo.getException()).hasMessageThat().isEqualTo(errorKey.toString());
}
@Test
public void twoErrors() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey firstError = GraphTester.toSkyKey("error1");
SkyKey secondError = GraphTester.toSkyKey("error2");
CountDownLatch firstStart = new CountDownLatch(1);
CountDownLatch secondStart = new CountDownLatch(1);
tester.getOrCreate(firstError).setBuilder(new ChainedFunction(firstStart, secondStart,
/*notifyFinish=*/null, /*waitForException=*/false, /*value=*/null,
ImmutableList.<SkyKey>of()));
tester.getOrCreate(secondError).setBuilder(new ChainedFunction(secondStart, firstStart,
/*notifyFinish=*/null, /*waitForException=*/false, /*value=*/null,
ImmutableList.<SkyKey>of()));
EvaluationResult<StringValue> result = eval(/*keepGoing=*/false, firstError, secondError);
assertWithMessage(result.toString()).that(result.hasError()).isTrue();
// With keepGoing=false, the eval call will terminate with exactly one error (the first one
// thrown). But the first one thrown here is non-deterministic since we synchronize the
// builders so that they run at roughly the same time.
assertThat(ImmutableSet.of(firstError, secondError)).contains(
Iterables.getOnlyElement(result.errorMap().keySet()));
}
@Test
public void simpleCycle() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey);
ErrorInfo errorInfo = eval(false, ImmutableList.of(aKey)).getError();
assertThat(errorInfo.getException()).isNull();
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(aKey, bKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).isEmpty();
}
@Test
public void cycleWithHead() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey midKey = GraphTester.toSkyKey("mid");
tester.getOrCreate(topKey).addDependency(midKey);
tester.getOrCreate(midKey).addDependency(aKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey);
ErrorInfo errorInfo = eval(false, ImmutableList.of(topKey)).getError();
assertThat(errorInfo.getException()).isNull();
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(aKey, bKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey, midKey).inOrder();
}
@Test
public void selfEdgeWithHead() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey midKey = GraphTester.toSkyKey("mid");
tester.getOrCreate(topKey).addDependency(midKey);
tester.getOrCreate(midKey).addDependency(aKey);
tester.getOrCreate(aKey).addDependency(aKey);
ErrorInfo errorInfo = eval(false, ImmutableList.of(topKey)).getError();
assertThat(errorInfo.getException()).isNull();
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(aKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey, midKey).inOrder();
}
@Test
public void cycleWithKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey goodKey = GraphTester.toSkyKey("good");
StringValue goodValue = new StringValue("good");
tester.set(goodKey, goodValue);
tester.getOrCreate(topKey).addDependency(midKey);
tester.getOrCreate(midKey).addDependency(aKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey);
EvaluationResult<StringValue> result = eval(true, topKey, goodKey);
assertThat(result.get(goodKey)).isEqualTo(goodValue);
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(aKey, bKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey, midKey).inOrder();
}
@Test
public void twoCycles() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey dKey = GraphTester.toSkyKey("d");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(aKey).addDependency(cKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey);
tester.getOrCreate(cKey).addDependency(dKey);
tester.getOrCreate(dKey).addDependency(cKey);
EvaluationResult<StringValue> result = eval(false, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
Iterable<CycleInfo> cycles = CycleInfo.prepareCycles(topKey,
ImmutableList.of(new CycleInfo(ImmutableList.of(aKey, bKey)),
new CycleInfo(ImmutableList.of(cKey, dKey))));
assertThat(cycles).contains(getOnlyElement(errorInfo.getCycleInfo()));
}
@Test
public void twoCyclesKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey dKey = GraphTester.toSkyKey("d");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(aKey).addDependency(cKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey);
tester.getOrCreate(cKey).addDependency(dKey);
tester.getOrCreate(dKey).addDependency(cKey);
EvaluationResult<StringValue> result = eval(true, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
CycleInfo aCycle = new CycleInfo(ImmutableList.of(topKey), ImmutableList.of(aKey, bKey));
CycleInfo cCycle = new CycleInfo(ImmutableList.of(topKey), ImmutableList.of(cKey, dKey));
assertThat(errorInfo.getCycleInfo()).containsExactly(aCycle, cCycle);
}
@Test
public void triangleBelowHeadCycle() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(aKey);
tester.getOrCreate(aKey).addDependency(bKey).addDependency(cKey);
tester.getOrCreate(bKey).addDependency(cKey);
tester.getOrCreate(cKey).addDependency(topKey);
EvaluationResult<StringValue> result = eval(true, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
CycleInfo topCycle = new CycleInfo(ImmutableList.of(topKey, aKey, cKey));
assertThat(errorInfo.getCycleInfo()).containsExactly(topCycle);
}
@Test
public void longCycle() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(aKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(cKey);
tester.getOrCreate(cKey).addDependency(topKey);
EvaluationResult<StringValue> result = eval(true, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
CycleInfo topCycle = new CycleInfo(ImmutableList.of(topKey, aKey, bKey, cKey));
assertThat(errorInfo.getCycleInfo()).containsExactly(topCycle);
}
@Test
public void cycleWithTail() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(aKey).addDependency(cKey);
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(aKey).addDependency(cKey);
tester.getOrCreate(cKey);
tester.set(cKey, new StringValue("cValue"));
EvaluationResult<StringValue> result = eval(false, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
ErrorInfo errorInfo = result.getError(topKey);
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(aKey, bKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey).inOrder();
}
/** Regression test: "value cannot be ready in a cycle". */
@Test
public void selfEdgeWithExtraChildrenUnderCycle() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey zKey = GraphTester.toSkyKey("z");
SkyKey cKey = GraphTester.toSkyKey("c");
tester.getOrCreate(aKey).addDependency(zKey);
tester.getOrCreate(zKey).addDependency(cKey).addDependency(zKey);
tester.getOrCreate(cKey).addDependency(aKey);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(aKey));
assertThat(result.get(aKey)).isNull();
ErrorInfo errorInfo = result.getError(aKey);
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(zKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(aKey).inOrder();
}
/** Regression test: "value cannot be ready in a cycle". */
@Test
public void cycleWithExtraChildrenUnderCycle() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
SkyKey dKey = GraphTester.toSkyKey("d");
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(cKey).addDependency(dKey);
tester.getOrCreate(cKey).addDependency(aKey);
tester.getOrCreate(dKey).addDependency(bKey);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(aKey));
assertThat(result.get(aKey)).isNull();
ErrorInfo errorInfo = result.getError(aKey);
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(bKey, dKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(aKey).inOrder();
}
/** Regression test: "value cannot be ready in a cycle". */
@Test
public void cycleAboveIndependentCycle() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey bKey = GraphTester.toSkyKey("b");
SkyKey cKey = GraphTester.toSkyKey("c");
tester.getOrCreate(aKey).addDependency(bKey);
tester.getOrCreate(bKey).addDependency(cKey);
tester.getOrCreate(cKey).addDependency(aKey).addDependency(bKey);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(aKey));
assertThat(result.get(aKey)).isNull();
assertThat(result.getError(aKey).getCycleInfo()).containsExactly(
new CycleInfo(ImmutableList.of(aKey, bKey, cKey)),
new CycleInfo(ImmutableList.of(aKey), ImmutableList.of(bKey, cKey)));
}
@Test
public void valueAboveCycleAndExceptionReportsException() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey aKey = GraphTester.toSkyKey("a");
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey bKey = GraphTester.toSkyKey("b");
tester.getOrCreate(aKey).addDependency(bKey).addDependency(errorKey);
tester.getOrCreate(bKey).addDependency(bKey);
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(aKey));
assertThat(result.get(aKey)).isNull();
assertThat(result.getError(aKey).getException()).isNotNull();
CycleInfo cycleInfo = Iterables.getOnlyElement(result.getError(aKey).getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(bKey).inOrder();
assertThat(cycleInfo.getPathToCycle()).containsExactly(aKey).inOrder();
}
@Test
public void errorValueStored() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result = eval(false, ImmutableList.of(errorKey));
assertThat(result.keyNames()).isEmpty();
assertThat(result.errorMap().keySet()).containsExactly(errorKey);
ErrorInfo errorInfo = result.getError();
assertThat(errorInfo.getRootCauses().toList()).containsExactly(errorKey);
// Update value. But builder won't rebuild it.
tester.getOrCreate(errorKey).setHasError(false);
tester.set(errorKey, new StringValue("no error?"));
result = eval(false, ImmutableList.of(errorKey));
assertThat(result.keyNames()).isEmpty();
assertThat(result.errorMap().keySet()).containsExactly(errorKey);
errorInfo = result.getError();
assertThat(errorInfo.getRootCauses().toList()).containsExactly(errorKey);
}
/**
* Regression test: "OOM in Skyframe cycle detection".
* We only store the first 20 cycles found below any given root value.
*/
@Test
public void manyCycles() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey topKey = GraphTester.toSkyKey("top");
for (int i = 0; i < 100; i++) {
SkyKey dep = GraphTester.toSkyKey(Integer.toString(i));
tester.getOrCreate(topKey).addDependency(dep);
tester.getOrCreate(dep).addDependency(dep);
}
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
assertManyCycles(result.getError(topKey), topKey, /*selfEdge=*/false);
}
/**
* Regression test: "OOM in Skyframe cycle detection".
* We filter out multiple paths to a cycle that go through the same child value.
*/
@Test
public void manyPathsToCycle() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey cycleKey = GraphTester.toSkyKey("cycle");
tester.getOrCreate(topKey).addDependency(midKey);
tester.getOrCreate(cycleKey).addDependency(cycleKey);
for (int i = 0; i < 100; i++) {
SkyKey dep = GraphTester.toSkyKey(Integer.toString(i));
tester.getOrCreate(midKey).addDependency(dep);
tester.getOrCreate(dep).addDependency(cycleKey);
}
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(topKey));
assertThat(result.get(topKey)).isNull();
CycleInfo cycleInfo = Iterables.getOnlyElement(result.getError(topKey).getCycleInfo());
assertThat(cycleInfo.getCycle()).hasSize(1);
assertThat(cycleInfo.getPathToCycle()).hasSize(3);
assertThat(cycleInfo.getPathToCycle().subList(0, 2)).containsExactly(topKey, midKey).inOrder();
}
/**
* Checks that errorInfo has many self-edge cycles, and that one of them is a self-edge of
* topKey, if {@code selfEdge} is true.
*/
private static void assertManyCycles(ErrorInfo errorInfo, SkyKey topKey, boolean selfEdge) {
assertThat(Iterables.size(errorInfo.getCycleInfo())).isGreaterThan(1);
assertThat(Iterables.size(errorInfo.getCycleInfo())).isLessThan(50);
boolean foundSelfEdge = false;
for (CycleInfo cycle : errorInfo.getCycleInfo()) {
assertThat(cycle.getCycle()).hasSize(1); // Self-edge.
if (!Iterables.isEmpty(cycle.getPathToCycle())) {
assertThat(cycle.getPathToCycle()).containsExactly(topKey).inOrder();
} else {
assertThat(cycle.getCycle()).containsExactly(topKey).inOrder();
foundSelfEdge = true;
}
}
assertWithMessage(errorInfo + ", " + topKey).that(foundSelfEdge).isEqualTo(selfEdge);
}
@Test
public void manyUnprocessedValuesInCycle() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey lastSelfKey = GraphTester.toSkyKey("zlastSelf");
SkyKey firstSelfKey = GraphTester.toSkyKey("afirstSelf");
SkyKey midSelfKey = GraphTester.toSkyKey("midSelf9");
// We add firstSelf first so that it is processed last in cycle detection (LIFO), meaning that
// none of the dep values have to be cleared from firstSelf.
tester.getOrCreate(firstSelfKey).addDependency(firstSelfKey);
for (int i = 0; i < 100; i++) {
SkyKey firstDep = GraphTester.toSkyKey("first" + i);
SkyKey midDep = GraphTester.toSkyKey("midSelf" + i + "dep");
SkyKey lastDep = GraphTester.toSkyKey("last" + i);
tester.getOrCreate(firstSelfKey).addDependency(firstDep);
tester.getOrCreate(midSelfKey).addDependency(midDep);
tester.getOrCreate(lastSelfKey).addDependency(lastDep);
if (i == 90) {
// Most of the deps will be cleared from midSelf.
tester.getOrCreate(midSelfKey).addDependency(midSelfKey);
}
tester.getOrCreate(firstDep).addDependency(firstDep);
tester.getOrCreate(midDep).addDependency(midDep);
tester.getOrCreate(lastDep).addDependency(lastDep);
}
// All the deps will be cleared from lastSelf.
tester.getOrCreate(lastSelfKey).addDependency(lastSelfKey);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true,
ImmutableList.of(lastSelfKey, firstSelfKey, midSelfKey));
assertWithMessage(result.toString()).that(result.keyNames()).isEmpty();
assertThat(result.errorMap().keySet()).containsExactly(lastSelfKey, firstSelfKey, midSelfKey);
// Check lastSelfKey.
ErrorInfo errorInfo = result.getError(lastSelfKey);
assertWithMessage(errorInfo.toString())
.that(Iterables.size(errorInfo.getCycleInfo()))
.isEqualTo(1);
CycleInfo cycleInfo = Iterables.getOnlyElement(errorInfo.getCycleInfo());
assertThat(cycleInfo.getCycle()).containsExactly(lastSelfKey);
assertThat(cycleInfo.getPathToCycle()).isEmpty();
// Check firstSelfKey. It should not have discovered its own self-edge, because there were too
// many other values before it in the queue.
assertManyCycles(result.getError(firstSelfKey), firstSelfKey, /*selfEdge=*/false);
// Check midSelfKey. It should have discovered its own self-edge.
assertManyCycles(result.getError(midSelfKey), midSelfKey, /*selfEdge=*/true);
}
@Test
public void errorValueStoredWithKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result = eval(true, ImmutableList.of(errorKey));
assertThat(result.keyNames()).isEmpty();
assertThat(result.errorMap().keySet()).containsExactly(errorKey);
ErrorInfo errorInfo = result.getError();
assertThat(errorInfo.getRootCauses().toList()).containsExactly(errorKey);
// Update value. But builder won't rebuild it.
tester.getOrCreate(errorKey).setHasError(false);
tester.set(errorKey, new StringValue("no error?"));
result = eval(true, ImmutableList.of(errorKey));
assertThat(result.keyNames()).isEmpty();
assertThat(result.errorMap().keySet()).containsExactly(errorKey);
errorInfo = result.getError();
assertThat(errorInfo.getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void continueWithErrorDep() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
tester.set("after", new StringValue("after"));
SkyKey parentKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentKey).addErrorDependency(errorKey, new StringValue("recovered"))
.setComputedValue(CONCATENATE).addDependency("after");
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(parentKey));
assertThat(result.errorMap()).isEmpty();
assertThat(result.get(parentKey).getValue()).isEqualTo("recoveredafter");
result = eval(/*keepGoing=*/false, ImmutableList.of(parentKey));
assertThat(result.keyNames()).isEmpty();
Map.Entry<SkyKey, ErrorInfo> error = Iterables.getOnlyElement(result.errorMap().entrySet());
assertThat(error.getKey()).isEqualTo(parentKey);
assertThat(error.getValue().getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void transformErrorDep() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentErrorKey).addErrorDependency(errorKey, new StringValue("recovered"))
.setHasError(true);
EvaluationResult<StringValue> result = eval(
/*keepGoing=*/false, ImmutableList.of(parentErrorKey));
assertThat(result.keyNames()).isEmpty();
Map.Entry<SkyKey, ErrorInfo> error = Iterables.getOnlyElement(result.errorMap().entrySet());
assertThat(error.getKey()).isEqualTo(parentErrorKey);
assertThat(error.getValue().getRootCauses().toList()).containsExactly(parentErrorKey);
}
@Test
public void transformErrorDepKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentErrorKey).addErrorDependency(errorKey, new StringValue("recovered"))
.setHasError(true);
EvaluationResult<StringValue> result = eval(
/*keepGoing=*/true, ImmutableList.of(parentErrorKey));
assertThat(result.keyNames()).isEmpty();
Map.Entry<SkyKey, ErrorInfo> error = Iterables.getOnlyElement(result.errorMap().entrySet());
assertThat(error.getKey()).isEqualTo(parentErrorKey);
assertThat(error.getValue().getRootCauses().toList()).containsExactly(parentErrorKey);
}
@Test
public void transformErrorDepOneLevelDownKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
tester.set("after", new StringValue("after"));
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentErrorKey).addErrorDependency(errorKey, new StringValue("recovered"));
tester.set(parentErrorKey, new StringValue("parent value"));
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(parentErrorKey).addDependency("after")
.setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(topKey));
assertThat(ImmutableList.<String>copyOf(result.<String>keyNames())).containsExactly("top");
assertThat(result.get(topKey).getValue()).isEqualTo("parent valueafter");
assertThat(result.errorMap()).isEmpty();
}
@Test
public void transformErrorDepOneLevelDownNoKeepGoing() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
tester.getOrCreate(errorKey).setHasError(true);
tester.set("after", new StringValue("after"));
SkyKey parentErrorKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentErrorKey).addErrorDependency(errorKey, new StringValue("recovered"));
tester.set(parentErrorKey, new StringValue("parent value"));
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(parentErrorKey).addDependency("after")
.setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/false, ImmutableList.of(topKey));
assertThat(result.keyNames()).isEmpty();
Map.Entry<SkyKey, ErrorInfo> error = Iterables.getOnlyElement(result.errorMap().entrySet());
assertThat(error.getKey()).isEqualTo(topKey);
assertThat(error.getValue().getRootCauses().toList()).containsExactly(errorKey);
}
@Test
public void errorDepDoesntStopOtherDep() throws Exception {
graph = new InMemoryGraphImpl();
final SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result1 = eval(/*keepGoing=*/ true, ImmutableList.of(errorKey));
assertThatEvaluationResult(result1).hasError();
assertThatEvaluationResult(result1)
.hasErrorEntryForKeyThat(errorKey)
.hasExceptionThat()
.isNotNull();
final SkyKey otherKey = GraphTester.toSkyKey("other");
tester.getOrCreate(otherKey).setConstantValue(new StringValue("other"));
SkyKey topKey = GraphTester.toSkyKey("top");
final Exception topException = new SomeErrorException("top exception");
final AtomicInteger numComputes = new AtomicInteger(0);
tester
.getOrCreate(topKey)
.setBuilder(
new SkyFunction() {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
Map<SkyKey, ValueOrException<SomeErrorException>> values =
env.getValuesOrThrow(
ImmutableList.of(errorKey, otherKey), SomeErrorException.class);
if (numComputes.incrementAndGet() == 1) {
assertThat(env.valuesMissing()).isTrue();
} else {
assertThat(numComputes.get()).isEqualTo(2);
assertThat(env.valuesMissing()).isFalse();
}
try {
values.get(errorKey).get();
throw new AssertionError("Should have thrown");
} catch (SomeErrorException e) {
throw new SkyFunctionException(topException, Transience.PERSISTENT) {};
}
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
EvaluationResult<StringValue> result2 = eval(/*keepGoing=*/ true, ImmutableList.of(topKey));
assertThatEvaluationResult(result2).hasError();
assertThatEvaluationResult(result2)
.hasErrorEntryForKeyThat(topKey)
.hasExceptionThat()
.isSameInstanceAs(topException);
assertThat(numComputes.get()).isEqualTo(2);
}
/**
* Make sure that multiple unfinished children can be cleared from a cycle value.
*/
@Test
public void cycleWithMultipleUnfinishedChildren() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
SkyKey cycleKey = GraphTester.toSkyKey("zcycle");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey topKey = GraphTester.toSkyKey("top");
SkyKey selfEdge1 = GraphTester.toSkyKey("selfEdge1");
SkyKey selfEdge2 = GraphTester.toSkyKey("selfEdge2");
tester.getOrCreate(topKey).addDependency(midKey).setComputedValue(CONCATENATE);
// selfEdge* come before cycleKey, so cycleKey's path will be checked first (LIFO), and the
// cycle with mid will be detected before the selfEdge* cycles are.
tester.getOrCreate(midKey).addDependency(selfEdge1).addDependency(selfEdge2)
.addDependency(cycleKey)
.setComputedValue(CONCATENATE);
tester.getOrCreate(cycleKey).addDependency(midKey);
tester.getOrCreate(selfEdge1).addDependency(selfEdge1);
tester.getOrCreate(selfEdge2).addDependency(selfEdge2);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableSet.of(topKey));
assertThat(result.errorMap().keySet()).containsExactly(topKey);
Iterable<CycleInfo> cycleInfos = result.getError(topKey).getCycleInfo();
CycleInfo cycleInfo = Iterables.getOnlyElement(cycleInfos);
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey);
assertThat(cycleInfo.getCycle()).containsExactly(midKey, cycleKey);
}
/**
* Regression test: "value in cycle depends on error".
* The mid value will have two parents -- top and cycle. Error bubbles up from mid to cycle, and
* we should detect cycle.
*/
private void cycleAndErrorInBubbleUp(boolean keepGoing) throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey cycleKey = GraphTester.toSkyKey("cycle");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(midKey).setComputedValue(CONCATENATE);
tester.getOrCreate(midKey).addDependency(errorKey).addDependency(cycleKey)
.setComputedValue(CONCATENATE);
// We need to ensure that cycle value has finished its work, and we have recorded dependencies
CountDownLatch cycleFinish = new CountDownLatch(1);
tester.getOrCreate(cycleKey).setBuilder(new ChainedFunction(null,
null, cycleFinish, false, new StringValue(""), ImmutableSet.<SkyKey>of(midKey)));
tester.getOrCreate(errorKey).setBuilder(new ChainedFunction(null, cycleFinish,
null, /*waitForException=*/false, null, ImmutableSet.<SkyKey>of()));
EvaluationResult<StringValue> result = eval(keepGoing, ImmutableSet.of(topKey));
assertThat(result.errorMap().keySet()).containsExactly(topKey);
Iterable<CycleInfo> cycleInfos = result.getError(topKey).getCycleInfo();
if (keepGoing) {
// The error thrown will only be recorded in keep_going mode.
assertThat(result.getError().getRootCauses().toList()).containsExactly(errorKey);
}
assertThat(cycleInfos).isNotEmpty();
CycleInfo cycleInfo = Iterables.getOnlyElement(cycleInfos);
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey);
assertThat(cycleInfo.getCycle()).containsExactly(midKey, cycleKey);
}
@Test
public void cycleAndErrorInBubbleUpNoKeepGoing() throws Exception {
cycleAndErrorInBubbleUp(false);
}
@Test
public void cycleAndErrorInBubbleUpKeepGoing() throws Exception {
cycleAndErrorInBubbleUp(true);
}
/**
* Regression test: "value in cycle depends on error".
* We add another value that won't finish building before the threadpool shuts down, to check that
* the cycle detection can handle unfinished values.
*/
@Test
public void cycleAndErrorAndOtherInBubbleUp() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey cycleKey = GraphTester.toSkyKey("cycle");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(midKey).setComputedValue(CONCATENATE);
// We should add cycleKey first and errorKey afterwards. Otherwise there is a chance that
// during error propagation cycleKey will not be processed, and we will not detect the cycle.
tester.getOrCreate(midKey).addDependency(errorKey).addDependency(cycleKey)
.setComputedValue(CONCATENATE);
SkyKey otherTop = GraphTester.toSkyKey("otherTop");
CountDownLatch topStartAndCycleFinish = new CountDownLatch(2);
// In nokeep_going mode, otherTop will wait until the threadpool has received an exception,
// then request its own dep. This guarantees that there is a value that is not finished when
// cycle detection happens.
tester.getOrCreate(otherTop).setBuilder(new ChainedFunction(topStartAndCycleFinish,
new CountDownLatch(0), null, /*waitForException=*/true, new StringValue("never returned"),
ImmutableSet.<SkyKey>of(GraphTester.toSkyKey("dep that never builds"))));
tester.getOrCreate(cycleKey).setBuilder(new ChainedFunction(null, null,
topStartAndCycleFinish, /*waitForException=*/false, new StringValue(""),
ImmutableSet.<SkyKey>of(midKey)));
// error waits until otherTop starts and cycle finishes, to make sure otherTop will request
// its dep before the threadpool shuts down.
tester.getOrCreate(errorKey).setBuilder(new ChainedFunction(null, topStartAndCycleFinish,
null, /*waitForException=*/false, null,
ImmutableSet.<SkyKey>of()));
EvaluationResult<StringValue> result =
eval(/*keepGoing=*/false, ImmutableSet.of(topKey, otherTop));
assertThat(result.errorMap().keySet()).containsExactly(topKey);
Iterable<CycleInfo> cycleInfos = result.getError(topKey).getCycleInfo();
assertThat(cycleInfos).isNotEmpty();
CycleInfo cycleInfo = Iterables.getOnlyElement(cycleInfos);
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey);
assertThat(cycleInfo.getCycle()).containsExactly(midKey, cycleKey);
}
/**
* Regression test: "value in cycle depends on error".
* Here, we add an additional top-level key in error, just to mix it up.
*/
private void cycleAndErrorAndError(boolean keepGoing) throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey cycleKey = GraphTester.toSkyKey("cycle");
SkyKey midKey = GraphTester.toSkyKey("mid");
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addDependency(midKey).setComputedValue(CONCATENATE);
tester.getOrCreate(midKey).addDependency(errorKey).addDependency(cycleKey)
.setComputedValue(CONCATENATE);
SkyKey otherTop = GraphTester.toSkyKey("otherTop");
CountDownLatch topStartAndCycleFinish = new CountDownLatch(2);
// In nokeep_going mode, otherTop will wait until the threadpool has received an exception,
// then throw its own exception. This guarantees that its exception will not be the one
// bubbling up, but that there is a top-level value with an exception by the time the bubbling
// up starts.
tester.getOrCreate(otherTop).setBuilder(new ChainedFunction(topStartAndCycleFinish,
new CountDownLatch(0), null, /*waitForException=*/!keepGoing, null,
ImmutableSet.<SkyKey>of()));
// error waits until otherTop starts and cycle finishes, to make sure otherTop will request
// its dep before the threadpool shuts down.
tester.getOrCreate(errorKey).setBuilder(new ChainedFunction(null, topStartAndCycleFinish,
null, /*waitForException=*/false, null,
ImmutableSet.<SkyKey>of()));
tester.getOrCreate(cycleKey).setBuilder(new ChainedFunction(null, null,
topStartAndCycleFinish, /*waitForException=*/false, new StringValue(""),
ImmutableSet.<SkyKey>of(midKey)));
EvaluationResult<StringValue> result =
eval(keepGoing, ImmutableSet.of(topKey, otherTop));
if (keepGoing) {
assertThat(result.errorMap().keySet()).containsExactly(otherTop, topKey);
assertThat(result.getError(otherTop).getRootCauses().toList()).containsExactly(otherTop);
// The error thrown will only be recorded in keep_going mode.
assertThat(result.getError(topKey).getRootCauses().toList()).containsExactly(errorKey);
}
Iterable<CycleInfo> cycleInfos = result.getError(topKey).getCycleInfo();
assertThat(cycleInfos).isNotEmpty();
CycleInfo cycleInfo = Iterables.getOnlyElement(cycleInfos);
assertThat(cycleInfo.getPathToCycle()).containsExactly(topKey);
assertThat(cycleInfo.getCycle()).containsExactly(midKey, cycleKey);
}
@Test
public void cycleAndErrorAndErrorNoKeepGoing() throws Exception {
cycleAndErrorAndError(false);
}
@Test
public void cycleAndErrorAndErrorKeepGoing() throws Exception {
cycleAndErrorAndError(true);
}
@Test
public void testFunctionCrashTrace() throws Exception {
class ChildFunction implements SkyFunction {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) {
throw new IllegalStateException("I WANT A PONY!!!");
}
@Override public String extractTag(SkyKey skyKey) { return null; }
}
class ParentFunction implements SkyFunction {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
SkyValue dep = env.getValue(ChildKey.create("billy the kid"));
if (dep == null) {
return null;
}
throw new IllegalStateException(); // Should never get here.
}
@Override public String extractTag(SkyKey skyKey) { return null; }
}
ImmutableMap<SkyFunctionName, SkyFunction> skyFunctions =
ImmutableMap.of(
CHILD_TYPE, new ChildFunction(),
PARENT_TYPE, new ParentFunction());
ParallelEvaluator evaluator = makeEvaluator(new InMemoryGraphImpl(), skyFunctions, false);
RuntimeException e =
assertThrows(
RuntimeException.class,
() -> evaluator.eval(ImmutableList.of(ParentKey.create("octodad"))));
assertThat(e).hasCauseThat().hasMessageThat().isEqualTo("I WANT A PONY!!!");
assertThat(e)
.hasMessageThat()
.isEqualTo(
"Unrecoverable error while evaluating node 'child:billy the kid' "
+ "(requested by nodes 'parent:octodad')");
}
private static class SomeOtherErrorException extends Exception {
public SomeOtherErrorException(String msg) {
super(msg);
}
}
private void unexpectedErrorDep(boolean keepGoing) throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
final SomeOtherErrorException exception = new SomeOtherErrorException("error exception");
tester.getOrCreate(errorKey).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
throw new SkyFunctionException(exception, Transience.PERSISTENT) {};
}
@Override
public String extractTag(SkyKey skyKey) {
throw new UnsupportedOperationException();
}
});
SkyKey topKey = GraphTester.toSkyKey("top");
tester.getOrCreate(topKey).addErrorDependency(errorKey, new StringValue("recovered"))
.setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(keepGoing, ImmutableList.of(topKey));
assertThat(result.keyNames()).isEmpty();
assertThat(result.getError(topKey).getException()).isSameInstanceAs(exception);
assertThat(result.getError(topKey).getRootCauses().toList()).containsExactly(errorKey);
}
/**
* This and the following three tests are in response a bug: "Skyframe error propagation model is
* problematic". They ensure that exceptions a child throws that a value does not specify it can
* handle in getValueOrThrow do not cause a crash.
*/
@Test
public void unexpectedErrorDepKeepGoing() throws Exception {
unexpectedErrorDep(true);
}
@Test
public void unexpectedErrorDepNoKeepGoing() throws Exception {
unexpectedErrorDep(false);
}
private void unexpectedErrorDepOneLevelDown(final boolean keepGoing) throws Exception {
graph = new InMemoryGraphImpl();
SkyKey errorKey = GraphTester.toSkyKey("my_error_value");
final SomeErrorException exception = new SomeErrorException("error exception");
final SomeErrorException topException = new SomeErrorException("top exception");
final StringValue topValue = new StringValue("top");
tester.getOrCreate(errorKey).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws GenericFunctionException {
throw new GenericFunctionException(exception, Transience.PERSISTENT);
}
@Override
public String extractTag(SkyKey skyKey) {
throw new UnsupportedOperationException();
}
});
SkyKey topKey = GraphTester.toSkyKey("top");
final SkyKey parentKey = GraphTester.toSkyKey("parent");
tester.getOrCreate(parentKey).addDependency(errorKey).setComputedValue(CONCATENATE);
tester
.getOrCreate(topKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws GenericFunctionException, InterruptedException {
try {
if (env.getValueOrThrow(parentKey, SomeErrorException.class) == null) {
return null;
}
} catch (SomeErrorException e) {
assertWithMessage(e.toString()).that(e).isEqualTo(exception);
}
if (keepGoing) {
return topValue;
} else {
throw new GenericFunctionException(topException, Transience.PERSISTENT);
}
}
@Override
public String extractTag(SkyKey skyKey) {
throw new UnsupportedOperationException();
}
});
tester.getOrCreate(topKey).addErrorDependency(errorKey, new StringValue("recovered"))
.setComputedValue(CONCATENATE);
EvaluationResult<StringValue> result = eval(keepGoing, ImmutableList.of(topKey));
if (!keepGoing) {
assertThat(result.keyNames()).isEmpty();
assertThat(result.getError(topKey).getException()).isEqualTo(topException);
assertThat(result.getError(topKey).getRootCauses().toList()).containsExactly(topKey);
assertThatEvaluationResult(result).hasError();
} else {
assertThatEvaluationResult(result).hasNoError();
assertThat(result.get(topKey)).isSameInstanceAs(topValue);
}
}
@Test
public void unexpectedErrorDepOneLevelDownKeepGoing() throws Exception {
unexpectedErrorDepOneLevelDown(true);
}
@Test
public void unexpectedErrorDepOneLevelDownNoKeepGoing() throws Exception {
unexpectedErrorDepOneLevelDown(false);
}
/**
* Exercises various situations involving groups of deps that overlap -- request one group, then
* request another group that has a dep in common with the first group.
*
* @param sameFirst whether the dep in common in the two groups should be the first dep.
* @param twoCalls whether the two groups should be requested in two different builder calls.
* @param valuesOrThrow whether the deps should be requested using getValuesOrThrow.
*/
private void sameDepInTwoGroups(final boolean sameFirst, final boolean twoCalls,
final boolean valuesOrThrow) throws Exception {
graph = new InMemoryGraphImpl();
SkyKey topKey = GraphTester.toSkyKey("top");
final List<SkyKey> leaves = new ArrayList<>();
for (int i = 1; i <= 3; i++) {
SkyKey leaf = GraphTester.toSkyKey("leaf" + i);
leaves.add(leaf);
tester.set(leaf, new StringValue("leaf" + i));
}
final SkyKey leaf4 = GraphTester.toSkyKey("leaf4");
tester.set(leaf4, new StringValue("leaf" + 4));
tester.getOrCreate(topKey).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException,
InterruptedException {
if (valuesOrThrow) {
env.getValuesOrThrow(leaves, SomeErrorException.class);
} else {
env.getValues(leaves);
}
if (twoCalls && env.valuesMissing()) {
return null;
}
SkyKey first = sameFirst ? leaves.get(0) : leaf4;
SkyKey second = sameFirst ? leaf4 : leaves.get(2);
List<SkyKey> secondRequest = ImmutableList.of(first, second);
if (valuesOrThrow) {
env.getValuesOrThrow(secondRequest, SomeErrorException.class);
} else {
env.getValues(secondRequest);
}
if (env.valuesMissing()) {
return null;
}
return new StringValue("top");
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
eval(/*keepGoing=*/false, topKey);
assertThat(eval(/*keepGoing=*/false, topKey)).isEqualTo(new StringValue("top"));
}
@Test
public void sameDepInTwoGroups_Same_Two_Throw() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/true, /*twoCalls=*/true, /*valuesOrThrow=*/true);
}
@Test
public void sameDepInTwoGroups_Same_Two_Deps() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/true, /*twoCalls=*/true, /*valuesOrThrow=*/false);
}
@Test
public void sameDepInTwoGroups_Same_One_Throw() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/true, /*twoCalls=*/false, /*valuesOrThrow=*/true);
}
@Test
public void sameDepInTwoGroups_Same_One_Deps() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/true, /*twoCalls=*/false, /*valuesOrThrow=*/false);
}
@Test
public void sameDepInTwoGroups_Different_Two_Throw() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/false, /*twoCalls=*/true, /*valuesOrThrow=*/true);
}
@Test
public void sameDepInTwoGroups_Different_Two_Deps() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/false, /*twoCalls=*/true, /*valuesOrThrow=*/false);
}
@Test
public void sameDepInTwoGroups_Different_One_Throw() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/false, /*twoCalls=*/false, /*valuesOrThrow=*/true);
}
@Test
public void sameDepInTwoGroups_Different_One_Deps() throws Exception {
sameDepInTwoGroups(/*sameFirst=*/false, /*twoCalls=*/false, /*valuesOrThrow=*/false);
}
private void getValuesOrThrowWithErrors(boolean keepGoing) throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
final SkyKey errorDep = GraphTester.toSkyKey("errorChild");
final SomeErrorException childExn = new SomeErrorException("child error");
tester.getOrCreate(errorDep).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
throw new GenericFunctionException(childExn, Transience.PERSISTENT);
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
final List<SkyKey> deps = new ArrayList<>();
for (int i = 1; i <= 3; i++) {
SkyKey dep = GraphTester.toSkyKey("child" + i);
deps.add(dep);
tester.set(dep, new StringValue("child" + i));
}
final SomeErrorException parentExn = new SomeErrorException("parent error");
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
try {
SkyValue value = env.getValueOrThrow(errorDep, SomeErrorException.class);
if (value == null) {
return null;
}
} catch (SomeErrorException e) {
// Recover from the child error.
}
env.getValues(deps);
if (env.valuesMissing()) {
return null;
}
throw new GenericFunctionException(parentExn, Transience.PERSISTENT);
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
EvaluationResult<StringValue> evaluationResult = eval(keepGoing, ImmutableList.of(parentKey));
assertThat(evaluationResult.hasError()).isTrue();
assertThat(evaluationResult.getError().getException())
.isEqualTo(keepGoing ? parentExn : childExn);
}
@Test
public void getValuesOrThrowWithErrors_NoKeepGoing() throws Exception {
getValuesOrThrowWithErrors(/*keepGoing=*/false);
}
@Test
public void getValuesOrThrowWithErrors_KeepGoing() throws Exception {
getValuesOrThrowWithErrors(/*keepGoing=*/true);
}
@Test
public void duplicateCycles() throws Exception {
graph = new InMemoryGraphImpl();
SkyKey grandparentKey = GraphTester.toSkyKey("grandparent");
SkyKey parentKey1 = GraphTester.toSkyKey("parent1");
SkyKey parentKey2 = GraphTester.toSkyKey("parent2");
SkyKey loopKey1 = GraphTester.toSkyKey("loop1");
SkyKey loopKey2 = GraphTester.toSkyKey("loop2");
tester.getOrCreate(loopKey1).addDependency(loopKey2);
tester.getOrCreate(loopKey2).addDependency(loopKey1);
tester.getOrCreate(parentKey1).addDependency(loopKey1);
tester.getOrCreate(parentKey2).addDependency(loopKey2);
tester.getOrCreate(grandparentKey).addDependency(parentKey1);
tester.getOrCreate(grandparentKey).addDependency(parentKey2);
ErrorInfo errorInfo = evalValueInError(grandparentKey);
List<ImmutableList<SkyKey>> cycles = Lists.newArrayList();
for (CycleInfo cycleInfo : errorInfo.getCycleInfo()) {
cycles.add(cycleInfo.getCycle());
}
// Skyframe doesn't automatically dedupe cycles that are the same except for entry point.
assertThat(cycles).hasSize(2);
int numUniqueCycles = 0;
CycleDeduper<SkyKey> cycleDeduper = new CycleDeduper<SkyKey>();
for (ImmutableList<SkyKey> cycle : cycles) {
if (cycleDeduper.seen(cycle)) {
numUniqueCycles++;
}
}
assertThat(numUniqueCycles).isEqualTo(1);
}
@Test
public void signalValueEnqueuedAndEvaluated() throws Exception {
final Set<SkyKey> enqueuedValues = Sets.newConcurrentHashSet();
final Set<SkyKey> evaluatedValues = Sets.newConcurrentHashSet();
EvaluationProgressReceiver progressReceiver =
new EvaluationProgressReceiver.NullEvaluationProgressReceiver() {
@Override
public void enqueueing(SkyKey skyKey) {
enqueuedValues.add(skyKey);
}
@Override
public void evaluated(
SkyKey skyKey,
@Nullable SkyValue value,
Supplier<EvaluationSuccessState> evaluationSuccessState,
EvaluationState state) {
evaluatedValues.add(skyKey);
}
};
ExtendedEventHandler reporter =
new Reporter(
new EventBus(),
new EventHandler() {
@Override
public void handle(Event e) {
throw new IllegalStateException();
}
});
MemoizingEvaluator aug =
new InMemoryMemoizingEvaluator(
ImmutableMap.of(GraphTester.NODE_TYPE, tester.getFunction()),
new SequencedRecordingDifferencer(),
progressReceiver);
SequentialBuildDriver driver = new SequentialBuildDriver(aug);
tester.getOrCreate("top1").setComputedValue(CONCATENATE)
.addDependency("d1").addDependency("d2");
tester.getOrCreate("top2").setComputedValue(CONCATENATE).addDependency("d3");
tester.getOrCreate("top3");
assertThat(enqueuedValues).isEmpty();
assertThat(evaluatedValues).isEmpty();
tester.set("d1", new StringValue("1"));
tester.set("d2", new StringValue("2"));
tester.set("d3", new StringValue("3"));
EvaluationContext evaluationContext =
EvaluationContext.newBuilder()
.setKeepGoing(false)
.setNumThreads(200)
.setEventHander(reporter)
.build();
driver.evaluate(ImmutableList.of(GraphTester.toSkyKey("top1")), evaluationContext);
assertThat(enqueuedValues).containsExactlyElementsIn(
GraphTester.toSkyKeys("top1", "d1", "d2"));
assertThat(evaluatedValues).containsExactlyElementsIn(
GraphTester.toSkyKeys("top1", "d1", "d2"));
enqueuedValues.clear();
evaluatedValues.clear();
driver.evaluate(ImmutableList.of(GraphTester.toSkyKey("top2")), evaluationContext);
assertThat(enqueuedValues).containsExactlyElementsIn(GraphTester.toSkyKeys("top2", "d3"));
assertThat(evaluatedValues).containsExactlyElementsIn(GraphTester.toSkyKeys("top2", "d3"));
enqueuedValues.clear();
evaluatedValues.clear();
driver.evaluate(ImmutableList.of(GraphTester.toSkyKey("top1")), evaluationContext);
assertThat(enqueuedValues).isEmpty();
assertThat(evaluatedValues).containsExactlyElementsIn(GraphTester.toSkyKeys("top1"));
}
public void runDepOnErrorHaltsNoKeepGoingBuildEagerly(boolean childErrorCached,
final boolean handleChildError) throws Exception {
graph = new InMemoryGraphImpl();
SkyKey parentKey = GraphTester.toSkyKey("parent");
final SkyKey childKey = GraphTester.toSkyKey("child");
tester.getOrCreate(childKey).setHasError(/*hasError=*/true);
// The parent should be built exactly twice: once during normal evaluation and once
// during error bubbling.
final AtomicInteger numParentInvocations = new AtomicInteger(0);
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
int invocations = numParentInvocations.incrementAndGet();
if (handleChildError) {
try {
SkyValue value = env.getValueOrThrow(childKey, SomeErrorException.class);
// On the first invocation, either the child error should already be cached and
// not propagated, or it should be computed freshly and not propagated. On the
// second build (error bubbling), the child error should be propagated.
assertWithMessage("bogus non-null value " + value).that(value == null).isTrue();
assertWithMessage("parent incorrectly re-computed during normal evaluation")
.that(invocations)
.isEqualTo(1);
assertWithMessage("child error not propagated during error bubbling")
.that(env.inErrorBubblingForTesting())
.isFalse();
return value;
} catch (SomeErrorException e) {
assertWithMessage("child error propagated during normal evaluation")
.that(env.inErrorBubblingForTesting())
.isTrue();
assertThat(invocations).isEqualTo(2);
return null;
}
} else {
if (invocations == 1) {
assertWithMessage(
"parent's first computation should be during normal evaluation")
.that(env.inErrorBubblingForTesting())
.isFalse();
return env.getValue(childKey);
} else {
assertThat(invocations).isEqualTo(2);
assertWithMessage("parent incorrectly re-computed during normal evaluation")
.that(env.inErrorBubblingForTesting())
.isTrue();
return env.getValue(childKey);
}
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
if (childErrorCached) {
// Ensure that the child is already in the graph.
evalValueInError(childKey);
}
EvaluationResult<StringValue> result = eval(/*keepGoing=*/false, ImmutableList.of(parentKey));
assertThat(numParentInvocations.get()).isEqualTo(2);
assertThat(result.hasError()).isTrue();
assertThat(result.getError().getRootCauseOfException()).isEqualTo(childKey);
}
@Test
public void depOnErrorHaltsNoKeepGoingBuildEagerly_ChildErrorCachedAndHandled()
throws Exception {
runDepOnErrorHaltsNoKeepGoingBuildEagerly(/*childErrorCached=*/true,
/*handleChildError=*/true);
}
@Test
public void depOnErrorHaltsNoKeepGoingBuildEagerly_ChildErrorCachedAndNotHandled()
throws Exception {
runDepOnErrorHaltsNoKeepGoingBuildEagerly(/*childErrorCached=*/true,
/*handleChildError=*/false);
}
@Test
public void depOnErrorHaltsNoKeepGoingBuildEagerly_ChildErrorFreshAndHandled() throws Exception {
runDepOnErrorHaltsNoKeepGoingBuildEagerly(/*childErrorCached=*/false,
/*handleChildError=*/true);
}
@Test
public void depOnErrorHaltsNoKeepGoingBuildEagerly_ChildErrorFreshAndNotHandled()
throws Exception {
runDepOnErrorHaltsNoKeepGoingBuildEagerly(/*childErrorCached=*/false,
/*handleChildError=*/false);
}
@Test
public void raceConditionWithNoKeepGoingErrors_FutureError() throws Exception {
final CountDownLatch errorCommitted = new CountDownLatch(1);
final CountDownLatch otherStarted = new CountDownLatch(1);
final CountDownLatch otherParentSignaled = new CountDownLatch(1);
final SkyKey errorParentKey = GraphTester.toSkyKey("errorParentKey");
final SkyKey errorKey = GraphTester.toSkyKey("errorKey");
final SkyKey otherParentKey = GraphTester.toSkyKey("otherParentKey");
final SkyKey otherKey = GraphTester.toSkyKey("otherKey");
final AtomicInteger numOtherParentInvocations = new AtomicInteger(0);
final AtomicInteger numErrorParentInvocations = new AtomicInteger(0);
tester
.getOrCreate(otherParentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
int invocations = numOtherParentInvocations.incrementAndGet();
assertWithMessage("otherParentKey should not be restarted")
.that(invocations)
.isEqualTo(1);
return env.getValue(otherKey);
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(otherKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
otherStarted.countDown();
TrackingAwaiter.INSTANCE.awaitLatchAndTrackExceptions(
errorCommitted, "error didn't get committed to the graph in time");
return new StringValue("other");
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(errorKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
TrackingAwaiter.INSTANCE.awaitLatchAndTrackExceptions(
otherStarted, "other didn't start in time");
throw new GenericFunctionException(
new SomeErrorException("error"), Transience.PERSISTENT);
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(errorParentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
int invocations = numErrorParentInvocations.incrementAndGet();
try {
SkyValue value = env.getValueOrThrow(errorKey, SomeErrorException.class);
assertWithMessage("bogus non-null value " + value).that(value == null).isTrue();
if (invocations == 1) {
return null;
} else {
assertThat(env.inErrorBubblingForTesting()).isFalse();
fail("RACE CONDITION: errorParentKey was restarted!");
return null;
}
} catch (SomeErrorException e) {
assertWithMessage("child error propagated during normal evaluation")
.that(env.inErrorBubblingForTesting())
.isTrue();
assertThat(invocations).isEqualTo(2);
return null;
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
graph =
new NotifyingHelper.NotifyingProcessableGraph(
new InMemoryGraphImpl(),
new Listener() {
@Override
public void accept(SkyKey key, EventType type, Order order, Object context) {
if (key.equals(errorKey) && type == EventType.SET_VALUE && order == Order.AFTER) {
errorCommitted.countDown();
TrackingAwaiter.INSTANCE.awaitLatchAndTrackExceptions(
otherParentSignaled, "otherParent didn't get signaled in time");
// We try to give some time for ParallelEvaluator to incorrectly re-evaluate
// 'otherParentKey'. This test case is testing for a real race condition and the
// 10ms time was chosen experimentally to give a true positive rate of 99.8%
// (without a sleep it has a 1% true positive rate). There's no good way to do
// this without sleeping. We *could* introspect ParallelEvaulator's
// AbstractQueueVisitor to see if the re-evaluation has been enqueued, but that's
// relying on pretty low-level implementation details.
Uninterruptibles.sleepUninterruptibly(10, TimeUnit.MILLISECONDS);
}
if (key.equals(otherParentKey)
&& type == EventType.SIGNAL
&& order == Order.AFTER) {
otherParentSignaled.countDown();
}
}
});
EvaluationResult<StringValue> result = eval(/*keepGoing=*/false,
ImmutableList.of(otherParentKey, errorParentKey));
assertThat(result.hasError()).isTrue();
assertThat(result.getError().getRootCauseOfException()).isEqualTo(errorKey);
}
@Test
public void cachedErrorsFromKeepGoingUsedOnNoKeepGoing() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey errorKey = GraphTester.toSkyKey("error");
SkyKey parent1Key = GraphTester.toSkyKey("parent1");
SkyKey parent2Key = GraphTester.toSkyKey("parent2");
tester.getOrCreate(parent1Key).addDependency(errorKey).setConstantValue(
new StringValue("parent1"));
tester.getOrCreate(parent2Key).addDependency(errorKey).setConstantValue(
new StringValue("parent2"));
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(parent1Key));
assertThat(result.hasError()).isTrue();
assertThat(result.getError().getRootCauseOfException()).isEqualTo(errorKey);
result = eval(/*keepGoing=*/false, ImmutableList.of(parent2Key));
assertThat(result.hasError()).isTrue();
assertThat(result.getError(parent2Key).getRootCauseOfException()).isEqualTo(errorKey);
}
@Test
public void cachedTopLevelErrorsShouldHaltNoKeepGoingBuildEarly() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey errorKey = GraphTester.toSkyKey("error");
tester.getOrCreate(errorKey).setHasError(true);
EvaluationResult<StringValue> result = eval(/*keepGoing=*/true, ImmutableList.of(errorKey));
assertThat(result.hasError()).isTrue();
assertThat(result.getError().getRootCauseOfException()).isEqualTo(errorKey);
SkyKey rogueKey = GraphTester.toSkyKey("rogue");
tester.getOrCreate(rogueKey).setBuilder(new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) {
// This SkyFunction could do an arbitrarily bad computation, e.g. loop-forever. So we want
// to make sure that it is never run when we want to fail-fast anyway.
fail("eval call should have already terminated");
return null;
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
result = eval(/*keepGoing=*/false, ImmutableList.of(errorKey, rogueKey));
assertThat(result.hasError()).isTrue();
assertThat(result.getError(errorKey).getRootCauseOfException()).isEqualTo(errorKey);
assertThat(result.errorMap()).doesNotContainKey(rogueKey);
}
// Explicit test that we tolerate a SkyFunction that declares different [sequences of] deps each
// restart. Such behavior from a SkyFunction isn't desired, but Bazel-on-Skyframe does indeed do
// this.
@Test
public void declaresDifferentDepsAfterRestart() throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey grandChild1Key = GraphTester.toSkyKey("grandChild1");
tester.getOrCreate(grandChild1Key).setConstantValue(new StringValue("grandChild1"));
SkyKey child1Key = GraphTester.toSkyKey("child1");
tester
.getOrCreate(child1Key)
.addDependency(grandChild1Key)
.setConstantValue(new StringValue("child1"));
SkyKey grandChild2Key = GraphTester.toSkyKey("grandChild2");
tester.getOrCreate(grandChild2Key).setConstantValue(new StringValue("grandChild2"));
SkyKey child2Key = GraphTester.toSkyKey("child2");
tester.getOrCreate(child2Key).setConstantValue(new StringValue("child2"));
SkyKey parentKey = GraphTester.toSkyKey("parent");
AtomicInteger numComputes = new AtomicInteger(0);
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
switch (numComputes.incrementAndGet()) {
case 1:
env.getValue(child1Key);
Preconditions.checkState(env.valuesMissing());
return null;
case 2:
env.getValue(child2Key);
Preconditions.checkState(env.valuesMissing());
return null;
case 3:
return new StringValue("the third time's the charm!");
default:
throw new IllegalStateException();
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
EvaluationResult<StringValue> result = eval(/*keepGoing=*/ false, ImmutableList.of(parentKey));
assertThatEvaluationResult(result).hasNoError();
assertThatEvaluationResult(result)
.hasEntryThat(parentKey)
.isEqualTo(new StringValue("the third time's the charm!"));
}
private void runUnhandledTransitiveErrors(boolean keepGoing,
final boolean explicitlyPropagateError) throws Exception {
graph = new DeterministicHelper.DeterministicProcessableGraph(new InMemoryGraphImpl());
tester = new GraphTester();
SkyKey grandparentKey = GraphTester.toSkyKey("grandparent");
final SkyKey parentKey = GraphTester.toSkyKey("parent");
final SkyKey childKey = GraphTester.toSkyKey("child");
final AtomicBoolean errorPropagated = new AtomicBoolean(false);
tester
.getOrCreate(grandparentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
try {
return env.getValueOrThrow(parentKey, SomeErrorException.class);
} catch (SomeErrorException e) {
errorPropagated.set(true);
throw new GenericFunctionException(e, Transience.PERSISTENT);
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester
.getOrCreate(parentKey)
.setBuilder(
new SkyFunction() {
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
if (explicitlyPropagateError) {
try {
return env.getValueOrThrow(childKey, SomeErrorException.class);
} catch (SomeErrorException e) {
throw new GenericFunctionException(e, childKey);
}
} else {
return env.getValue(childKey);
}
}
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
});
tester.getOrCreate(childKey).setHasError(/*hasError=*/true);
EvaluationResult<StringValue> result = eval(keepGoing, ImmutableList.of(grandparentKey));
assertThat(result.hasError()).isTrue();
assertThat(errorPropagated.get()).isTrue();
assertThat(result.getError().getRootCauseOfException()).isEqualTo(grandparentKey);
}
@Test
public void unhandledTransitiveErrorsDuringErrorBubbling_ImplicitPropagation() throws Exception {
runUnhandledTransitiveErrors(/*keepGoing=*/false, /*explicitlyPropagateError=*/false);
}
@Test
public void unhandledTransitiveErrorsDuringErrorBubbling_ExplicitPropagation() throws Exception {
runUnhandledTransitiveErrors(/*keepGoing=*/false, /*explicitlyPropagateError=*/true);
}
@Test
public void unhandledTransitiveErrorsDuringNormalEvaluation_ImplicitPropagation()
throws Exception {
runUnhandledTransitiveErrors(/*keepGoing=*/true, /*explicitlyPropagateError=*/false);
}
@Test
public void unhandledTransitiveErrorsDuringNormalEvaluation_ExplicitPropagation()
throws Exception {
runUnhandledTransitiveErrors(/*keepGoing=*/true, /*explicitlyPropagateError=*/true);
}
private static class ChildKey extends AbstractSkyKey<String> {
private static final Interner<ChildKey> interner = BlazeInterners.newWeakInterner();
private ChildKey(String arg) {
super(arg);
}
static ChildKey create(String arg) {
return interner.intern(new ChildKey(arg));
}
@Override
public SkyFunctionName functionName() {
return CHILD_TYPE;
}
}
private static class ParentKey extends AbstractSkyKey<String> {
private static final Interner<ParentKey> interner = BlazeInterners.newWeakInterner();
private ParentKey(String arg) {
super(arg);
}
private static ParentKey create(String arg) {
return interner.intern(new ParentKey(arg));
}
@Override
public SkyFunctionName functionName() {
return PARENT_TYPE;
}
}
}