Description of the problem / feature request:

We're trying to enable --remote_download_minimal/--remote_download_toplevel for our builds (which use disk cache and remote cache), and encountered this error:

ERROR: /path/to/BUILD:71:12: Bundling App failed: Exec failed due to IOException: 181 errors during bulk transfer
com.google.devtools.build.lib.vfs.FileAccessException: /path/to/bazel-output-base/execroot/__main__/bazel-out/applebin_ios-ios_x86_64-dbg-ST-1f63e7a63487/bin/App/App-intermediates/nibs/Bundle.bundle/ViewController/ViewController.nib (Permission denied)
(a lot other similar logs)

(a Bazel release that includes 113eaca is needed to see the underlying errors)

Upon some investigation, looks like the exception was thrown somewhere between SpawnExecutionContext.prefetchInputsAndWait.

Another pattern I noticed is that inputs that were failed to fetch were all tree artifacts.

The build would succeed if I run the same bazel build again, but would fail again if I make some change and rebuild.

Feature requests: what underlying problem are you trying to solve with this feature?

Using --remote_download_minimal/--remote_download_toplevel for local builds.

What operating system are you running Bazel on?

macOS

What's the output of bazel info release?

release 6.0.0-pre.20220105.5