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From "Philippe Mouawad (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-2397) Strange behaviour of Store Percent Usage and associated Memory Usage controls : Abnormal SystemUsage memory limit reached
Date Thu, 17 Sep 2009 17:21:12 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-2397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=54320#action_54320
] 

Philippe Mouawad commented on AMQ-2397:
---------------------------------------

Investigating a little more , "Store percent used" behaviour seems ok.
As I understand the size may vary in the following cases:
- CleanupTask run
- storage of a new message that induces file creation (when file is unused for example ...)

Variations depend on periodicCleanupTask execution which merges files.
Maybe a little note in docs would be helpful.

So bug is more related to <loggingBrokerPlugin>

Is it a normal that reference store size is taken into account in the size of  "Store percent
used" beside the normal Journal ?

Philippe
www.ubik-ingenierie.com

> Strange behaviour of Store Percent Usage  and associated Memory Usage controls : Abnormal
SystemUsage memory limit reached
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-2397
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2397
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, Message Store
>         Environment: JDK 5 1.5.0_14 / Windows XP / Linux
>            Reporter: Philippe Mouawad
>         Attachments: activemq.xml, activemq.zip, activemq520-bug.pdf
>
>
> I attached the full scenario as a PDF to reproduce the issue.
> In the attached configuration notice the following:
> - org.apache.activemq.store.amq.AMQPersistenceAdapter is declared as a bean to allow
Memory usage control on store
> - Advisory messages are activated
> - sendFailIfNoSpace is set to true 
> - loggingBrokerPlugin is activated
> Since I have a listener that consumes messages I don't understand why although AMQ indicated
0 pending message:
> - Store percent used  continuously increase
> - Memory limit is reached while it was at 0
> See attached files
> Philippe 
> www.ubik-ingenierie.com

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