alpreu opened a new pull request #19035:
URL: https://github.com/apache/flink/pull/19035
## What is the purpose of the change
The default delivery guarantee of the Elasticsearch sink should be
AT_LEAST_ONCE as it was the case in 1.14 for upgradability/consistency reasons.
Chinese docs have to be updated still.
## Brief change log
- made AT_LEAST_ONCE the default delivery guarantee
- updated english docs
## Verifying this change
This change is already covered by existing tests, such as
ElasticsearchXSinkITCase, E2E Tests
## 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, 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**)
- If yes, how is the feature documented? (not applicable / **docs** /
JavaDocs / not documented)
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