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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SOLR-11469) LeaderElectionContextKeyTest has flawed logic: 50% of the time it checks the wrong shard's elections
Date Mon, 23 Oct 2017 07:45:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214775#comment-16214775
] 

Cao Manh Dat edited comment on SOLR-11469 at 10/23/17 7:44 AM:
---------------------------------------------------------------

Patch for this ticket. Beasted 150 times. The idea here is if will create two collection with
same sequence of requests ( no parallel ). We will have same replica names for each collection.
( This satisfy current logic of Assign.buildCoreNodeName )




was (Author: caomanhdat):
Patch for this ticket. The idea here is if will create two collection with same sequence of
requests ( no parallel ). We will have same replica names for each collection. ( This satisfy
current logic of Assign.buildCoreNodeName )



> LeaderElectionContextKeyTest has flawed logic: 50% of the time it checks the wrong shard's
elections
> ----------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11469
>                 URL: https://issues.apache.org/jira/browse/SOLR-11469
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>         Attachments: SOLR-11469.patch, SOLR-11469.patch, SOLR-11469_incomplete_and_broken.patch
>
>
> LeaderElectionContextKeyTest is very flaky -- and on millers beastit reports it shows
a suspiciously close to "50%" failure rate.
> Digging into the test i realized that it creates a 2 shard index, then picks "a leader"
to kill (arbitrarily) and then asserts that the leader election nodes for *shard1* are affected
... so ~50% of the time it kills the shard2 leader and then fails because it doesn't see an
election in shard1.



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