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https://issues.apache.org/jira/browse/SOLR-12727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson updated SOLR-12727:
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    Attachment: SOLR-12727.patch

> Upgrade ZooKeeper dependency to 3.4.13
> --------------------------------------
>
>                 Key: SOLR-12727
>                 URL: https://issues.apache.org/jira/browse/SOLR-12727
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 7.4
>            Reporter: Shawn Heisey
>            Assignee: Erick Erickson
>            Priority: Major
>         Attachments: SOLR-12727.patch, SOLR-12727.patch
>
>
> Upgrade ZK dependency to 3.4.13.  This fixes ZOOKEEPER-2184 which will make 
> the ZK client re-resolve the server hostnames when a connection fails.  This 
> will fix issues where a failed ZK container is replaced with a new one that 
> has a different IP address and DNS gets updated with the new address.
> Typically these upgrades do not require code changes, but that should be 
> verified.



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