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Posted to dev@lucene.apache.org by "Noble Paul (JIRA)" <ji...@apache.org> on 2018/10/29 13:13:00 UTC
[jira] [Assigned] (SOLR-12023) Autoscaling policy engine shuffles
replicas needlessly and can also suggest nonexistent replicas to be moved
[ https://issues.apache.org/jira/browse/SOLR-12023?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul reassigned SOLR-12023:
---------------------------------
Assignee: Noble Paul
> 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: 7.3, master (8.0)
>
> Attachments: SOLR-11066-failing.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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