rkhachatryan opened a new pull request #14218:
URL: https://github.com/apache/flink/pull/14218
## What is the purpose of the change
A check was added recently that the
`RemoteInputChannel.lastBarrierSequenceNumber` was not overwritten by a newer
barrier.
The check itself is valid, however the task shouldn't fail in that case.
Relying on the assumption of at most one **active** unaligned checkpoint at
a time, the older checkpoint should simply be declined.
Cleanup is needed for (all) channels, barrier controller, handler and
checkpoint writer. Therefore, abort in `SingleCheckpointBarrierHandler` should
be used.
## Verifying this change
This change is already covered by existing test:
`UnalignedCheckpointITCase`.`parallel pipeline with mixed channels, p = 20`
## 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/Mesos, 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? no
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