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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1144) replication hang
Date Fri, 02 Jul 2010 14:24:58 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884690#action_12884690
] 

Yonik Seeley commented on SOLR-1144:
------------------------------------

Thanks for the stack traces Toby!

Interesting... seems like the commit in the slave blocked...
{code}
	at org.apache.solr.common.util.ConcurrentLRUCache.getLatestAccessedItems(ConcurrentLRUCache.java:276)
{code}

So perhaps another thread locked, but didn't unlock the lock?

SOLR-1538 did fix something that could possibly lead to a deadlock, but it's super unlikely
(a very small object allocation would have to fail at just the right spot).  Still, if this
is easy enough to reproduce, could you try Solr 1.4.1 and see if it's fixed?  (and if it hangs
again, be sure to get stack traces... they are super helpful!)

> replication hang
> ----------------
>
>                 Key: SOLR-1144
>                 URL: https://issues.apache.org/jira/browse/SOLR-1144
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Yonik Seeley
>            Assignee: Noble Paul
>             Fix For: 1.4
>
>         Attachments: stacktrace-master.txt, stacktrace-slave-1.txt, stacktrace-slave-2.txt
>
>
> It seems that replication can sometimes hang.
> http://www.lucidimagination.com/search/document/403305a3fda18599

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