dianfu opened a new pull request #12459:
URL: https://github.com/apache/flink/pull/12459
## What is the purpose of the change
*It will print exception messages such as `CANCELLED: call already
cancelled` during Python UDF closes at times. The exception message is
confusing for users as actually the Job has already executed successfully. We
should try to find a way to solve it at Beam side. Before that, we could just
solve it by ignore the exception `cancelled before receiving half close` as
actually the exception message is useless and the above printed exception
message results from here.*
## Brief change log
- *Ignore the exception `cancelled before receiving half close`*
## Verifying this change
Tested manually that the exception message reported in the JIRA doesn't
occur.
## 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? (not applicable)
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