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Posted to issues@flink.apache.org by "Robert Metzger (Jira)" <ji...@apache.org> on 2020/08/07 06:48:00 UTC
[jira] [Commented] (FLINK-13689) Rest High Level Client for
Elasticsearch6.x connector leaks threads if no connection could be
established
[ https://issues.apache.org/jira/browse/FLINK-13689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17172937#comment-17172937 ]
Robert Metzger commented on FLINK-13689:
----------------------------------------
release-1.10: https://github.com/apache/flink/commit/b717877f69d90b3081bb6a79e8d78196831256a7
> 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: static-max
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.11.0
>
> Time Spent: 40m
> 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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