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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/05/11 01:33:32 UTC

[GitHub] [flink] shuiqiangchen opened a new pull request #12061: [FLINK-17454][python]python gateway callback server port should not b…

shuiqiangchen opened a new pull request #12061:
URL: https://github.com/apache/flink/pull/12061

…e determined by JVM process.

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## What is the purpose of the change

Fixed the bug of "Address already in use" when starting the python gateway after launched the java gateway server which determines the callback server address and port before the python gateway is started.
When the python gateway is starting, the free port assigned by java gateway server might be occupied by other process, then cause an "Address already in use" error. Therefore, we should get the callback client port after the python gateway started and reset it back to java gateway server to avoid this potential conflict.

## Brief change log

We get the callback client port after the python gateway started and reset it back to java gateway server to avoid this potential conflict.

## Verifying this change

This change can be verified by all pyflink table API tests which need to start the communication between python process and java process.

## 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**)

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