When the Data Distributor exits due to a movekeys_conflict (normal
ownership change), all child actors are cancelled. If the BulkLoad job
manager is mid-read of the job manifest file, the actor_cancelled error
propagates into AsyncFileDetachable::read(), which asserts that reads
must not be cancelled (assertOnReadWriteCancel=true), triggering a
BugDetected internal_error.
Wrap the file->read() in getBulkLoadJobFileManifestEntryFromJobManifestFile
with uncancellable(), matching the pattern already used in
readBulkFileBytes in the same file. This prevents the cancellation from
reaching the file I/O layer while still allowing the actor to be
cancelled after the read completes.
Reproduces with: BulkDumpingS3.toml -s 2030534189
Michael Stack