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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