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https://issues.apache.org/jira/browse/SOLR-13386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16818255#comment-16818255
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ASF subversion and git services commented on SOLR-13386:
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Commit ecbf7daf5674a3bd754781b1b2a0fcb1777dba06 in lucene-solr's branch
refs/heads/master from Mark Robert Miller
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=ecbf7da ]
SOLR-13386: OverseerTaskQueue#remove should not throw an exception when no node
exists after an exists check and the Overseer work loop should not allow free
spinning the loop when it hits a KeeperException.
> Remove race in OverseerTaskQueue#remove that can result in the Overseer
> causing a Zookeeper call spin spike.
> ------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-13386
> URL: https://issues.apache.org/jira/browse/SOLR-13386
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Mark Miller
> Assignee: Mark Miller
> Priority: Major
> Fix For: 7.7.2, 8.1
>
> Attachments: SOLR-13386.patch
>
>
> If the data call hits NoNodeException, it will throw and the Overseer work
> queue processor will catch it and loop and repeat, which causes major zk
> getData / NoNode call traffic or other such things.
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