Apache Flink

Hi team, we’re using `flink-connector-elasticsearch8:4.0.0-2.0` with Java client `8.19.22` and encountering <https://issues.apache.org/jira/browse/FLINK-38054|FLINK-38054>: checkpoint recovery fails with a Kryo `ClassNotFoundException` for `IndexOperation`, even after Elasticsearch becomes available again.

The fix was merged in <https://github.com/apache/flink-connector-elasticsearch/pull/159|PR #159>, but is not included in our released connector version. Could you publish a new connector release containing this fix and share the expected timeline? We can help validate a release candidate.

FLINK-38054 lists `elasticsearch-4.0.0` and `4.1.0` as fix versions, but the published `4.0.0-2.0` artifact’s `OperationSerializer` does not contain PR #159’s changes. Could you clarify the `4.0.0` assignment and advise when a release containing the fix will be available?