walterddr opened a new pull request #13163:
URL: https://github.com/apache/flink/pull/13163
## What is the purpose of the change
This pull request makes adds support for acquiring random port when JMX
server setting is explicitly set to 0.
## Brief change log
- incorporate random port logic in JMXService.
- added random port poking utility.
## Verifying this change
- added additional unit-test in JMXServiceTest.
## 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: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? docs.
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