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https://issues.apache.org/jira/browse/SOLR-13884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16963368#comment-16963368
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Yonik Seeley commented on SOLR-13884:
-------------------------------------
This may not be a concurrency issue....
I just tried sequential with sleeping for 10 seconds after every create and I
got a 5/15 (5 on one node, 15 on another)!
Is the test making some sort of incorrect assumption?
> Concurrent collection creation leads to unbalanced cluster
> ----------------------------------------------------------
>
> Key: SOLR-13884
> URL: https://issues.apache.org/jira/browse/SOLR-13884
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Yonik Seeley
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When multiple collection creations are done concurrently, the cluster can end
> up very unbalanced, with many (or most) replicas going to a small set of
> nodes.
> This was observed on both 8.2 and master.
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