dawidwys opened a new pull request #15146:
URL: https://github.com/apache/flink/pull/15146
## What is the purpose of the change
This PR introduces an active, timer based time out for checkpoints
alignment. After the time out we switch over to unaligned checkpoint. Compared
to the passive time out it accounts for the situation that the barriers are
stuck in the network stack for a considerable amount of time.
## Brief change log
* Added `Clock` to the `AlternatingController` to ease up testing
* Reworked static helper test methods into builders for
CheckpointedInputGate and SingleInputBarrierHandler
* Added methods for registering callbacks on time out via `TimerService`
which are executed in the mailbox thread.
## Verifying this change
Added tests in:
* AlternatingControllerTest
* Added one more test case in UnalignedCheckpointsITCase
## 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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