Return FAILED_PRECONDITION instead of NOT_FOUND when a blob referenced by an action is missing.

Fix an issue in the remote execution server used for integration tests where, if a blob is missing from the CAS, it would return NotFound instead of a PreconditionError.

See https://github.com/bazelbuild/remote-apis, file build/bazel/remote/execution/v2/remote_execution.proto:

    // Execute an action remotely.
    [...]
    // * `FAILED_PRECONDITION`: One or more errors occurred in setting up the
    //   action requested, such as a missing input or command or no worker being
    //   available. The client may be able to fix the errors and retry.
    [...]
    // In the case of a missing input or command, the server SHOULD additionally
    // send a [PreconditionFailure][google.rpc.PreconditionFailure] error detail
    // where, for each requested blob not present in the CAS, there is a
    // `Violation` with a `type` of `MISSING` and a `subject` of
    // `"blobs/{digest_function/}{hash}/{size}"` indicating the digest of the
    // missing blob. The `subject` is formatted the same way as the
    // `resource_name` provided to
    // [ByteStream.Read][google.bytestream.ByteStream.Read], with the leading
    // instance name omitted. `digest_function` MUST thus be omitted if its value
    // is one of MD5, MURMUR3, SHA1, SHA256, SHA384, SHA512, or VSO.

In particular, there is no mention of the NOT_FOUND GRPC response code in the Execute documentation.

Closes #20295.

PiperOrigin-RevId: 585573706
Change-Id: Ib439363d2284523f2cf9f74c353566e98eb6025e
2 files changed
tree: 4cd8d4b6a7e90118511d138154f7f9000136bc25
  1. .bazelci/
  2. .github/
  3. examples/
  4. scripts/
  5. site/
  6. src/
  7. third_party/
  8. tools/
  9. .bazelrc
  10. .bazelversion
  11. .gitattributes
  12. .gitignore
  13. AUTHORS
  14. bazel_downloader.cfg
  15. BUILD
  16. CHANGELOG.md
  17. CODE_OF_CONDUCT.md
  18. CODEOWNERS
  19. combine_distfiles.py
  20. combine_distfiles_to_tar.sh
  21. compile.sh
  22. CONTRIBUTING.md
  23. CONTRIBUTORS
  24. distdir.bzl
  25. extensions.bzl
  26. LICENSE
  27. maven_install.json
  28. MODULE.bazel
  29. MODULE.bazel.lock
  30. rbe_extension.bzl
  31. README.md
  32. repositories.bzl
  33. requirements.txt
  34. SECURITY.md
  35. WORKSPACE
  36. WORKSPACE.bzlmod
  37. workspace_deps.bzl
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