yun-wang opened a new pull request #12619:
URL: https://github.com/apache/flink/pull/12619
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## What is the purpose of the change
*This pull request supports user resource cleanup in Elasticsearch sink.*
## Brief change log
- *Expose a default close method in `ElasticsearchSinkFunction`.*
## Verifying this change
This change added tests and can be verified as follows:
- *Added a unit test that both `open()` and `close()` methods are invoked
in the Elasticsearch sink as expected.*
## 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)`: (yes)
- 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? (yes)
- If yes, how is the feature documented? (JavaDocs)
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