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https://issues.apache.org/jira/browse/HADOOP-15683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16583390#comment-16583390
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Steve Loughran commented on HADOOP-15683:
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Is this the same as HADOOP-10219? Linking to that
> Client.setupConnection should not block Client.stop() calls
> -----------------------------------------------------------
>
> Key: HADOOP-15683
> URL: https://issues.apache.org/jira/browse/HADOOP-15683
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common, ipc
> Reporter: Lukas Majercak
> Assignee: Lukas Majercak
> Priority: Critical
> Attachments: HADOOP-15683.000.patch
>
>
> If the IPC Client is still setting up connections when Client.stop() is
> called, the stop() call will not succeed until setupConnection finishes
> (successfully or with failure).
> This can cause very long delay (maxFailures * timeout can be more than
> 10minutes depending on configuration) in stopping the client.
> Client.stop() is for example used in NN switch from Standby to Active, and
> can therefore have very bad consequences and cause downtime.
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