1996fanrui opened a new pull request, #22925:
URL: https://github.com/apache/flink/pull/22925
## What is the purpose of the change
When one source is always active and other sources are idle (Either there is
no data, or alignment causes idle.), these source won't resume.
For example, sourceA is always active, sourceB is idle due to there is no
data. SourceB won't resume forever even if it can read more data.
## Brief change log
*(for example:)*
- *The TaskInfo is stored in the blob store on job creation time as a
persistent artifact*
- *Deployments RPC transmits only the blob storage reference*
- *TaskManagers retrieve the TaskInfo from the blob cache*
## Verifying this change
- *Improve the
SourceOperatorAlignmentTest#testWatermarkAlignmentWithIdleness*
This test will fail when `allSubtasksIdle=false` with master branch, and it
can pass with this PR.
## 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, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
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