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https://issues.apache.org/jira/browse/SOLR-5991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17694612#comment-17694612
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David Smiley commented on SOLR-5991:
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There is a REJOINLEADERELECTION core (not collection) admin command created in
SOLR-6691 for use by the REBALANCELEADERS collection admin command. It's not
documented as it was some internal thing. +1 to document it and perhaps even
give a collection level convenience command. I'd even say this is "newdev".
> SolrCloud: Add API to move leader off a Solr instance
> -----------------------------------------------------
>
> Key: SOLR-5991
> URL: https://issues.apache.org/jira/browse/SOLR-5991
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Affects Versions: 4.7.1
> Reporter: Rich Mayfield
> Priority: Major
>
> Common maintenance chores require restarting Solr instances.
> The process of a shutdown becomes a whole lot more reliable if we can
> proactively move any leadership roles off of the Solr instance we are going
> to shut down. The leadership election process then runs immediately.
> I am not sure what the semantics should be (either accomplishes the goal but
> one of these might be best):
> * A call to tell a core to give up leadership (thus the next replica is
> chosen)
> * A call to specify which core should become the leader
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