[jira] [Assigned] (SOLR-5325) zk connection loss causes overseer leader loss

["Mark Miller (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-5325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Miller reassigned SOLR-5325:
---------------------------------

    Assignee: Mark Miller

> 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
>            Assignee: Mark Miller
>         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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