Zakelly opened a new pull request, #26415:
URL: https://github.com/apache/flink/pull/26415
## What is the purpose of the change
There is a concurrency issue for reference counting in ForSt file cache,
which could lead to a read error in some special scenarios (e.g. extremely
frequent cache thrashing)
## Brief change log
Two problem:
- All the read interfaces in `CachedDataInputStream` should release the
reference **only after** the stream is not the `originalStream`
- The stream retrieving methods in task threads should consider the latency
of status switch.
## Verifying this change
This change is already covered by existing tests, such as
`ForStFlinkFileSystemTest`.
## 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): yes
- 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
- If yes, how is the feature documented? not applicable
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