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https://issues.apache.org/jira/browse/FLINK-13689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16921962#comment-16921962
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Jark Wu commented on FLINK-13689:
---------------------------------
I changed the fix version to 1.8.3 because of releasing 1.8.2. Please let me
know if you want it in 1.8.2.
> Rest High Level Client for Elasticsearch6.x connector leaks threads if no
> connection could be established
> ---------------------------------------------------------------------------------------------------------
>
> Key: FLINK-13689
> URL: https://issues.apache.org/jira/browse/FLINK-13689
> Project: Flink
> Issue Type: Bug
> Components: Connectors / ElasticSearch
> Affects Versions: 1.8.1
> Reporter: Rishindra Kumar
> Assignee: Rishindra Kumar
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.3
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> If the created Elastic Search Rest High Level Client(rhlClient) is
> unreachable, Current code throws RuntimeException. But, it doesn't close the
> client which causes thread leak.
>
> *Current Code*
> *if (!rhlClient.ping()) {*
> *throw new RuntimeException("There are no reachable Elasticsearch
> nodes!");*
> *}*
>
> *Change Needed*
> rhlClient needs to be closed.
>
> *Steps to Reproduce*
> 1. Add the ElasticSearch Sink to the stream. Start the Flink program without
> starting the ElasticSearch.
> 2. Program will give error: "*Too many open files*" and it doesn't write even
> though you start the Elastic Search later.
>
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