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https://issues.apache.org/jira/browse/SOLR-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Miller resolved SOLR-4805.
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Resolution: Fixed
> Calling Collection RELOAD where collection has a single core, leaves
> collection offline and unusable till reboot
> ----------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4805
> URL: https://issues.apache.org/jira/browse/SOLR-4805
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.3
> Reporter: Jared Rodriguez
> Assignee: Mark Miller
> Fix For: 5.0, 4.4
>
> Attachments: SOLR-4805.patch
>
>
> If you have a collection that is composed of a single core, then calling
> reload on that collection leaves the core offline. This happens even if
> nothing at all has changed about the collection or its config. This happens
> whether you call reload via an http GET or if you directly call reload via
> the collections api.
> Tried a collection with a single core that contains data, change nothing
> about the config in ZK and call reload and the collection. The call
> completes, but ZK flags that replica with "state":"down"
> Try it where a the single core contains no data and the same thing happens,
> ZK config updates and broadcasts "state":"down" for the replica.
> I did not try this in a multicore or replicated core environment.
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