[jira] [Commented] (SOLR-12739) Make autoscaling policy based replica placement the default strategy for placing replicas

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[jira] [Commented] (SOLR-12739) Make autoscaling policy based replica placement the default strategy for placing replicas

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-12739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16647111#comment-16647111 ]

Steve Rowe commented on SOLR-12739:
-----------------------------------

Another failure, reproduces well enough for me on master to run {{git bisect}} and locate the first failing commit ({{dbed8baf}} on this issue) when I leave off the {{-Dtests.method}} cmdline param.  From [https://builds.apache.org/job/Lucene-Solr-BadApples-Tests-7.x/183/]:

{noformat}
Checking out Revision d921fe50e9bfcace5253a27e69d2e91f3eccc172 (refs/remotes/origin/branch_7x)
[...]
   [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestCollectionStateWatchers -Dtests.method=testSimpleCollectionWatch -Dtests.seed=466EB2632B3B0B17 -Dtests.multiplier=2 -Dtests.slow=true -Dtests.badapples=true -Dtests.locale=is-IS -Dtests.timezone=Africa/Lagos -Dtests.asserts=true -Dtests.file.encoding=ISO-8859-1
   [junit4] FAILURE 33.2s J2 | TestCollectionStateWatchers.testSimpleCollectionWatch <<<
   [junit4]    > Throwable #1: java.lang.AssertionError: CollectionStateWatcher was never notified of cluster change
   [junit4]    > at __randomizedtesting.SeedInfo.seed([466EB2632B3B0B17:1B557D136C369429]:0)
   [junit4]    > at org.apache.solr.common.cloud.TestCollectionStateWatchers.testSimpleCollectionWatch(TestCollectionStateWatchers.java:141)
   [junit4]    > at java.lang.Thread.run(Thread.java:748)
[...]
   [junit4]   2> NOTE: test params are: codec=Asserting(Lucene70): {}, docValues:{}, maxPointsInLeafNode=815, maxMBSortInHeap=5.42575346479253, sim=RandomSimilarity(queryNorm=true): {}, locale=is-IS, timezone=Africa/Lagos
   [junit4]   2> NOTE: Linux 4.4.0-137-generic amd64/Oracle Corporation 1.8.0_172 (64-bit)/cpus=4,threads=1,free=74336440,total=429391872
{noformat}


> Make autoscaling policy based replica placement the default strategy for placing replicas
> -----------------------------------------------------------------------------------------
>
>                 Key: SOLR-12739
>                 URL: https://issues.apache.org/jira/browse/SOLR-12739
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public)
>          Components: AutoScaling, SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>            Priority: Major
>             Fix For: 7.6, master (8.0)
>
>         Attachments: SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch
>
>
> Today the default placement strategy is the same one used since Solr 4.x which is to select nodes on a round robin fashion. I propose to make the autoscaling policy based replica placement as the default policy for placing replicas.
> This is related to SOLR-12648 where even though we have default cluster preferences, we don't use them unless a policy is also configured.



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