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https://issues.apache.org/jira/browse/SOLR-12807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16630684#comment-16630684
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Erick Erickson commented on SOLR-12807:
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I should have stated that I don't know that SOLR-10420 is your problem. But if
you could test one of the fixed versions and verify and report back (and
perhaps close this ticket if that Jira does fix this issue) that'd be helpful.
> out of memory error due to a lot of zk watchers in solr cloud
> --------------------------------------------------------------
>
> Key: SOLR-12807
> URL: https://issues.apache.org/jira/browse/SOLR-12807
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 6.1
> Reporter: Mine Orange
> Priority: Major
>
> Analyzing the dump file,we found a lot of watchers in childWatches of
> ZKWatchManager,nearly 1.8G,the znode of childWatches is
> /overseer/collection-queue-work,confirm that it is not because of the
> frequent use of collection API and the network is normal.
> The instance is the overseer leader of a solr cluster and did not restart for
> more than a year,suspect that the watchers grow with time.
> Our solr version is 6.1 and zookeeper version is 3.4.9.
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