pnowojski opened a new pull request #15714:
URL: https://github.com/apache/flink/pull/15714
Exception can be thrown for example if task is being cancelled. This was
leading to
same buffer being recycled twice. Most of the times that was just leading to
an
IllegalReferenceCount being thrown, which was ignored, as this task was
being cancelled.
However on rare occasions this buffer could have been picked up by another
task
after being recycled for the first time, recycled second time and being
picked up
by another (third task). In that case we had two users of the same buffer,
which
could lead to all sort of data corruptions.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (**yes** / no
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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