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https://issues.apache.org/jira/browse/YARN-10479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17226271#comment-17226271
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Jim Brennan commented on YARN-10479:
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patch 003 fixes the checkstyle issues.
> RMProxy should retry on SocketTimeout Exceptions
> ------------------------------------------------
>
> Key: YARN-10479
> URL: https://issues.apache.org/jira/browse/YARN-10479
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn
> Affects Versions: 2.10.1, 3.4.1
> Reporter: Jim Brennan
> Assignee: Jim Brennan
> Priority: Major
> Attachments: YARN-10479.001.patch, YARN-10479.002.patch,
> YARN-10479.003.patch
>
>
> During an incident involving a DNS outage, a large number of nodemanagers
> failed to come back into service because they hit a socket timeout when
> trying to re-register with the RM.
> SocketTimeoutException is not currently one of the exceptions that the
> RMProxy will retry. Based on this incident, it seems like it should be. We
> made this change internally about a year ago and it has been running in
> production since.
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