zoltar9264 opened a new pull request, #24933:
URL: https://github.com/apache/flink/pull/24933
## What is the purpose of the change
Clean up useless file-merging managed directory (which never be include in
any checkpoint) on exit of TM.
## Brief change log
1. Normalize file-merging sub dir
- format file-merging subtask dir to
`job_{jobId}_op_{operatorId}_{subtaskIndex}_{parallelism}`
- format file-merging exclusive dir to `job_{jobId}_tm_{tmResourceId}`
2. Track managed directory reference and clean up useless one when exit.
## Verifying this change
Normalize file-merging sub dir can be verified by
*FileMergingSnapshotManagerTestBase#testCreateFileMergingSnapshotManager*.
And useless file-merging managed dir clean up can be verified by tests add
in this change : *FileMergingSnapshotManagerTestBase#testManagedDirCleanup*.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
Please help review this change @Zakelly , thanks.
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