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https://issues.apache.org/jira/browse/SOLR-5325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christine Poerschke updated SOLR-5325:
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Attachment: SOLR-5325.patch
Attaching Overseer.java patch for solr 4.4.0, OverseerCollectionProcessor.java
could be changed in similar way.
> zk connection loss causes overseer leader loss
> ----------------------------------------------
>
> Key: SOLR-5325
> URL: https://issues.apache.org/jira/browse/SOLR-5325
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.3, 4.4
> Reporter: Christine Poerschke
> Attachments: SOLR-5325.patch
>
>
> The problem we saw was that when the solr overseer leader experienced
> temporary zk connectivity problems it stopped processing overseer queue
> events.
> This first happened when quorum within the external zk ensemble was lost due
> to too many zookeepers being stopped (similar to SOLR-5199). The second time
> it happened when there was a sufficient number of zookeepers but they were
> holding zookeeper leadership elections and thus refused connections (the
> elections were taking several seconds, we were using the default
> zookeeper.cnxTimeout=5s value and it was hit for one ensemble member).
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