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https://issues.apache.org/jira/browse/SOLR-12863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16649016#comment-16649016
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Shawn Heisey commented on SOLR-12863:
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I haven't checked what happens in cloud mode with collections. Is RELOAD
available for collections even if none of the cores for the collection can
initialize successfully?
> Provide a way in the admin UI to reload cores that failed to start
> ------------------------------------------------------------------
>
> Key: SOLR-12863
> URL: https://issues.apache.org/jira/browse/SOLR-12863
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI
> Affects Versions: 7.5
> Reporter: Shawn Heisey
> Priority: Major
>
> Imagine a situation where a core fails to load because there's some kind of
> minor problem with the configuration for the core/collection.
> Once you've fixed whatever caused the core to fail, there is no way provided
> in the admin UI to reload the core so it will start working. The CoreAdmin
> API can be accessed directly to initiate the RELOAD action, if the user is
> able to figure out how to do that. Restarting the entire node would take
> care of it, potentially with major disruption.
> It would be really good to have cores that fail to initialize show up in the
> CoreAdmin section of the admin UI, in a different color and with some kind of
> visual indicator for the color blind, with a limited set of options that
> includes RELOAD.
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