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Posted to dev@lucene.apache.org by "Hoss Man (JIRA)" <ji...@apache.org> on 2018/11/06 17:46:00 UTC
[jira] [Reopened] (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 ]
Hoss Man reopened SOLR-12023:
-----------------------------
Noble: what the heck happened with your push to master? did you just force push an old commit????
eb359ca0790af505debf33a57c3bfb18eecbab4e broke a tone of stuff in CHANGES.txt -- including removing the entire 8.0 section, and deleting/moving a bunch of stuff going back as far as 7.3!?!
https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;a=blobdiff;f=solr/CHANGES.txt;h=be31fe7f4793fd27f1213779bc0880281fa9c1df;hp=90cce5b27f9b770ceb85a9c4a10b4979041a8b05;hb=eb359ca;hpb=f669a1fb0e1ff974df93229c41cd397956cb1e9a
> 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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