experimental_execution_log_compact_file prints java.io.FileNotFoundException warning for each .param file during build about bazel

[tjgq]

I have a theory for what is happening and will attempt a fix.

[tjgq]

@ivan-golub Can you provide a self-contained repro?

I tried building a trivial hello world cc_binary with --features=compiler_param_file --experimental_execution_log_compact_file=log --disk_cache=disk --remote_download_toplevel, but I don't see it; it doesn't matter if it's a cache hit or miss. I expect something else is required.

[satyanandak]

Hi @ivan-golub,
Can you please take a look into the above comment ?

[ivan-golub]

Sure. will try to create a repro when I have a chance.

[Strum355]

Also getting this for Go-related targets, but I cant reproduce it locally. We use remote caching in CI, but not locally. Bazel 7.1.0 and compiler_param_file not explicitly set
WARNING: Exception java.io.FileNotFoundException: /mnt/ephemeral/output/__main__/execroot/__main__/bazel-out/k8-fastbuild/bin/cmd/gitserver/internal/gitserverfs/gitserverfs_test_/gitserverfs_test-0.params (No such file or directory) while logging properties of ActionSpawn for cmd/gitserver/internal/gitserverfs/gitserverfs_test_/gitserverfs_test

[tjgq]

It makes sense to me that it would only occur when building against a disk/remote cache and without the bytes (as that's the only situation where some of the inputs might not exist on disk).

@Strum355 Are you able to reduce your Go build into a minimal reproducible example you can share? (even if it's non-deterministic and it takes a few runs to hit it)?

[iancha1992]

A fix for this issue has been included in Bazel 7.2.0 RC1. Please test out the release candidate and report any issues as soon as possible.
If you're using Bazelisk, you can point to the latest RC by setting USE_BAZEL_VERSION=7.2.0rc1. Thanks!