Yun Wang created FLINK-17623:
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Summary: Elasticsearch sink should support user resource cleanup
Key: FLINK-17623
URL:
https://issues.apache.org/jira/browse/FLINK-17623 Project: Flink
Issue Type: Improvement
Components: Connectors / ElasticSearch
Reporter: Yun Wang
There should be a way for an [ElasticsearchSinkFunction|[
https://github.com/apache/flink/blob/master/flink-connectors/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkFunction.java#L61]] implementation to use resources with the same lifecycle as the Elasticsearch sink, for example, an [RestHighLevelClient|[
https://www.elastic.co/guide/en/elasticsearch/client/java-rest/master/java-rest-high.html]].
Currently there is no way to clean up such resources. This can be achieved by exposing a `close()` method in the ElasticsearchSinkFunction interface, and invoke the close method from E[lasticsearchSinkBase.close|[
https://github.com/apache/flink/blob/master/flink-connectors/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBase.java#L331]]
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