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Date: Thu, 7 Oct 2010 09:50:42 -0400 (EDT)
From: "Jeff Genender (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Commented: (AMQ-2736) KahaDB doesn't clean up old files
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    [ https://issues.apache.org/activemq/browse/AMQ-2736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=62431#action_62431 ] 

Jeff Genender commented on AMQ-2736:
------------------------------------

I ran the attached example and was able to reproduce it and indeed appears to endlessly grow.  I did a thread dump during the condition and there appears to be a possible locking problem with multiple "KahaDB Scheduler" threads.

As an experiment I killed one of the KahaDB Schedulers and it seemed to clean up.  I ran the example several times and it seems to clean up.  So this *may* be the culprit.

So please try this as a work around...

In the broker configuration set schedulerSupport="false" and see if the files clean up.  This may help until we identify the waits on multiple schedulers.

> KahaDB doesn't clean up old files
> ---------------------------------
>
>                 Key: AMQ-2736
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2736
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.3.2
>            Reporter: Adrian Trenaman
>            Priority: Critical
>         Attachments: AMQ-2736.zip
>
>
> Over time, we're seeing that kahadb doesn't clean up old journal files. As a result, we eventually run out of disk space, or rather, we hit our usage limits and our producers are slowed down by the producer flow control mechanism. Others have experienced this problem too (for example, see http://mail-archives.apache.org/mod_mbox/activemq-users/201002.mbox/%3C27502591.post@talk.nabble.com%3E)
> For now, we're moving back to the old amqPersistenceStore. 

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