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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-7408) Let SolrCore be the only thing which registers/unregisters a config directory listener
Date Sun, 19 Apr 2015 08:04:59 GMT

    [ https://issues.apache.org/jira/browse/SOLR-7408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14501737#comment-14501737
] 

Shai Erera commented on SOLR-7408:
----------------------------------

bq. Should we start ref counting the ZK watches?

The confDir listeners are per SolrCore instance, so I don't think we should ref-count them.
Each SolrCore will add/remove its own listener.

> Let SolrCore be the only thing which registers/unregisters a config directory listener
> --------------------------------------------------------------------------------------
>
>                 Key: SOLR-7408
>                 URL: https://issues.apache.org/jira/browse/SOLR-7408
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>            Reporter: Shai Erera
>            Assignee: Shai Erera
>         Attachments: SOLR-7408.patch, SOLR-7408.patch
>
>
> As reported here: http://markmail.org/message/ynkm2axkdprppgef, there is a race condition
which results in an exception when creating multiple collections over the same config set.
I was able to reproduce it in a test, although I am only able to reproduce if I put break
points and manually simulate the problematic context switches.



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