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https://issues.apache.org/jira/browse/SOLR-12023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674343#comment-16674343
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ASF subversion and git services commented on SOLR-12023:
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Commit eb359ca0790af505debf33a57c3bfb18eecbab4e in lucene-solr's branch
refs/heads/master from [~noble.paul]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=eb359ca ]
SOLR-12023: Autoscaling policy engine shuffles replicas needlessly
> Autoscaling policy engine shuffles replicas needlessly and can also suggest
> nonexistent replicas to be moved
> ------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-12023
> URL: https://issues.apache.org/jira/browse/SOLR-12023
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: AutoScaling, SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Noble Paul
> Priority: Major
> Fix For: 7.6, master (8.0)
>
> Attachments: SOLR-11066-failing.patch, SOLR-12023.patch
>
>
> A test that I wrote in SOLR-11066 found the following problem:
> Cluster: 2 nodes
> Collection: 1 shard, 3 replicas, maxShardsPerNode=5
> No autoscaling policy or preference applied
> When the trigger runs, the computed plan needlessly shuffles all three
> replicas and then proceeds to return suggestions with only numbers as core
> names. These cores do not exist. I found that these numbers are generated
> internally by the framework as placeholders for moved cores for further
> calculations. They should never ever be suggested to the users.
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