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https://issues.apache.org/jira/browse/SOLR-6091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14011302#comment-14011302
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Noble Paul edited comment on SOLR-6091 at 5/28/14 4:53 PM:
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I have fixed this and I have logged it whenever a race condition occurs. So ,
the logs say that the race condition occurs . But after a few (10+) restarts I
could still end up without an Overseer . SOLR-6095 is another issue I have
identified and fixed it for local testing . So these 2 issues together have
resolved the problem. I have patches for both and will post them once some
tests are added
was (Author: noble.paul):
I have fixed this and I have logged it whenever a race condition occurs. So ,
the logs say that the race condition occurs . But after a few (10+) restarts I
could still end up without an Overseer . SOLR-6095 is another issue I have
identified and fixed it for local testing . So these 2 issues together have
resolved the problem
> Race condition in prioritizeOverseerNodes can trigger extra QUIT operations
> ---------------------------------------------------------------------------
>
> Key: SOLR-6091
> URL: https://issues.apache.org/jira/browse/SOLR-6091
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.7, 4.8
> Reporter: Shalin Shekhar Mangar
> Assignee: Noble Paul
> Fix For: 4.9, 5.0
>
> Attachments: SOLR-6091.patch
>
>
> When using the overseer roles feature, there is a possibility of more than
> one thread executing the prioritizeOverseerNodes method and extra QUIT
> commands being inserted into the overseer queue.
> At a minimum, the prioritizeOverseerNodes should be synchronized to avoid a
> race condition.
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