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https://issues.apache.org/jira/browse/SOLR-5135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13739643#comment-13739643
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ASF subversion and git services commented on SOLR-5135:
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Commit 1513864 from [~markrmil...@gmail.com] in branch 'dev/trunk'
[ https://svn.apache.org/r1513864 ]

SOLR-5135: Harden Collection API deletion of /collections/$collection ZooKeeper 
node
                
> Deleting a collection should be extra aggressive in the face of failures.
> -------------------------------------------------------------------------
>
>                 Key: SOLR-5135
>                 URL: https://issues.apache.org/jira/browse/SOLR-5135
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>             Fix For: 4.5, 5.0
>
>         Attachments: SOLR-5135.patch
>
>
> Until Zk is the source of truth for the cluster, zk and local node states can 
> get out of whack in certain situations - as a result, sometimes you cannot 
> clean out all of the remnants of a collection to recreate it. For example, if 
> the collection is listed in zk under /collections, but is not in 
> clusterstate.json, you cannot remove or create the collection again due to a 
> early exception in the collection removal chain.
> I think we should probably still return the error - but also delete as much 
> as we can.

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