[
https://issues.apache.org/jira/browse/SOLR-3782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447721#comment-13447721
]
Mark Miller commented on SOLR-3782:
-----------------------------------
I committed a first iteration - I have more refinement/improvement coming.
> A leader going down while updates are coming in can cause shard inconsistency.
> ------------------------------------------------------------------------------
>
> Key: SOLR-3782
> URL: https://issues.apache.org/jira/browse/SOLR-3782
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Reporter: Mark Miller
> Assignee: Mark Miller
> Fix For: 4.0, 5.0
>
>
> Harpoon into the head of the great whale I have been chasing for a couple
> weeks now.
> ChaosMonkey test was exposing this.
> Turns out the problem was the solr cmd distrib executor - when closing the
> leader CoreContainer, we would close the zkController while updates can still
> flow through the distrib executor. The result was that we would send updates
> from the leader briefly even though there was a new leader.
> I had suspected something similar to this at one point in the hunt and
> started adding some defensive state checks that we wanted to add anyway. I
> don't think they caught all of this issue due to the limited tightness one of
> the state checks can get to (checking the cloudstate leader from a replica
> against the leader indicated by the request).
> So the answer is to finally work out how to stop the solr cmd distrib
> executor - because we need to stop it before closing zkController and giving
> up our role as leader.
> I've worked that all out and the issue no longer seems to be a problem.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
