rkhachatryan opened a new pull request #12489:
URL: https://github.com/apache/flink/pull/12489
## What is the purpose of the change
`StreamTask.triggerCheckpoint` calls `channelStateWriter.start`
unconditionally.
For savepoints and when unaligned mode is disabled this is incorrect.
## Brief change log
- add `subtaskCheckpointCoordinator.initCheckpoint` and use it in
`StreamTask`
- replace `ChannelStateWriter` with `SubtaskCheckpointCoordinator` in
`Barrierhandler` and call `initCheckpoint` there too
## Verifying this change
- Added `SubtaskCheckpointCoordinatorTest.testInitCheckpoint` (unit test)
## 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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