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https://issues.apache.org/jira/browse/SOLR-13386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841531#comment-16841531
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ASF subversion and git services commented on SOLR-13386:
--------------------------------------------------------
Commit 1ebc103a8231ba5143f0b5fa487ff4ebd316ac1b in lucene-solr's branch
refs/heads/branch_7_7 from Mark Robert Miller
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1ebc103 ]
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.
(Cherry picked from fe37e18d1064cc1460be67bd1ea891ad1d0d362e)
> 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, master (9.0)
>
> 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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