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https://issues.apache.org/jira/browse/FLINK-7444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16128873#comment-16128873
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Stephan Ewen commented on FLINK-7444:
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The case you mentioned to me sounds like it should be the responsibility of the
MiniCluster to do the shutdown asynchronously.
> Make external calls non-blocking
> --------------------------------
>
> Key: FLINK-7444
> URL: https://issues.apache.org/jira/browse/FLINK-7444
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination
> Affects Versions: 1.4.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Labels: flip-6
>
> All external calls from a {{RpcEndpoint}} can be potentially blocking, e.g.
> calls to the {{FatalErrorHandler}}. Therefore, I propose to make all these
> calls coming from the {{RpcEndpoint's}} main thread non-blocking by running
> them in an {{Executor}}. That way the main thread will never be blocked.
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