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https://issues.apache.org/jira/browse/SOLR-10006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15830721#comment-15830721
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Hoss Man commented on SOLR-10006:
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is this fixed by SOLR-9836?
> Cannot do a full sync (fetchindex) if the replica can't open a searcher
> -----------------------------------------------------------------------
>
> Key: SOLR-10006
> URL: https://issues.apache.org/jira/browse/SOLR-10006
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 5.3.1, 6.4
> Reporter: Erick Erickson
>
> Doing a full sync or fetchindex requires an open searcher and if you can't
> open the searcher those operations fail.
> For discussion. I've seen a situation in the field where a replica's index
> became corrupt. When the node was restarted, the replica tried to do a full
> sync but fails because the core can't open a searcher. The replica went into
> an endless sync/fail/sync cycle.
> I couldn't reproduce that exact scenario, but it's easy enough to get into a
> similar situation. Create a 2x2 collection and index some docs. Then stop one
> of the instances and go in and remove a couple of segments files and restart.
> The replica stays in the "down" state, fine so far.
> Manually issue a fetchindex. That fails because the replica can't open a
> searcher. Sure, issuing a fetchindex is abusive.... but I think it's the same
> underlying issue: why should we care about the state of a replica's current
> index when we're going to completely replace it anyway?
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