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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-9199) ZkController#publishAndWaitForDownStates logic is inefficient
Date Thu, 09 Jun 2016 20:25:21 GMT

    [ https://issues.apache.org/jira/browse/SOLR-9199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323270#comment-15323270
] 

ASF subversion and git services commented on SOLR-9199:
-------------------------------------------------------

Commit d55cc8f293aec4ccc882b1a92ed450c9ec3877dc in lucene-solr's branch refs/heads/master
from [~gchanan]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=d55cc8f ]

SOLR-9199: ZkController#publishAndWaitForDownStates logic is inefficient


> ZkController#publishAndWaitForDownStates logic is inefficient
> -------------------------------------------------------------
>
>                 Key: SOLR-9199
>                 URL: https://issues.apache.org/jira/browse/SOLR-9199
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Hrishikesh Gadre
>            Assignee: Hrishikesh Gadre
>         Attachments: SOLR-9199.patch
>
>
> The following logic introduced as part of SOLR-8720 is inefficient. 
> https://github.com/apache/lucene-solr/blob/6c0331b8309603eaaf14b6677afba5ffe99f16a3/solr/core/src/java/org/apache/solr/cloud/ZkController.java#L687-L712
> Specifically,
> * foundStates flag is set to TRUE before the for loop.
> * In the for loop we check if any replica on this node is not in the DOWN state. If yes,
then foundStates = FALSE
> * If foundStates == TRUE then we break out of the loop and return.
> The problem here is that once foundStates is set to FALSE, it is never reset to TRUE.
Hence we end up spending the whole 60 secs iterating over the collections even though all
the replicas are marked as DOWN in later iterations.



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