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https://issues.apache.org/jira/browse/SOLR-8586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15122039#comment-15122039
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Yonik Seeley commented on SOLR-8586:
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So the basic idea is that when a replica coming back up syncs to a leader, it
can request a fingerprint in addition to the last leader versions. It can then
grab and apply any missing versions, calculate it's own fingerprint, and
compare for equality.
> Implement hash over all documents to check for shard synchronization
> --------------------------------------------------------------------
>
> Key: SOLR-8586
> URL: https://issues.apache.org/jira/browse/SOLR-8586
> Project: Solr
> Issue Type: Improvement
> Reporter: Yonik Seeley
> Attachments: SOLR-8586.patch, SOLR-8586.patch
>
>
> An order-independent hash across all of the versions in the index should
> suffice. The hash itself is pretty easy, but we need to figure out
> when/where to do this check (for example, I think PeerSync is currently used
> in multiple contexts and this check would perhaps not be appropriate for all
> PeerSync calls?)
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