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From "Christian Posta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APLO-257) Better memory usage (avoid Java OOM exceptions)
Date Wed, 12 Sep 2012 13:28:07 GMT

    [ https://issues.apache.org/jira/browse/APLO-257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13453982#comment-13453982
] 

Christian Posta commented on APLO-257:
--------------------------------------

Lionel,
Is this something that happens regularly?
Any other hints (machine specs, etc) for how to create this?
I've been trying and cannot recreate it yet (using the stomp benchmark from APLO-176)
                
> Better memory usage (avoid Java OOM exceptions)
> -----------------------------------------------
>
>                 Key: APLO-257
>                 URL: https://issues.apache.org/jira/browse/APLO-257
>             Project: ActiveMQ Apollo
>          Issue Type: Improvement
>         Environment: apollo-99-trunk-20120902.143447-110
>            Reporter: Lionel Cons
>
> When running a stomp-benchmark based stress test against Apollo, it generated several
OOM exceptions like:
> 2012-09-03 23:51:45,275 | WARN  | handle failed | 
> java.lang.OutOfMemoryError: Java heap space
> 2012-09-03 23:52:02,428 | WARN  |  | 
> java.lang.OutOfMemoryError: Java heap space
> 2012-09-03 23:52:01,372 | WARN  | Error for /broker | 
> java.lang.OutOfMemoryError: Java heap space
> 2012-09-03 23:51:55,554 | WARN  | Problem scavenging sessions | 
> java.lang.OutOfMemoryError: Java heap space
> The JVM already had 8GB of heap. FWIW, here are the options used: "-server -Xmx8192m
-Xms4096m -XX:-UseBiasedLocking".
> Would it be possible for Apollo to detect when its getting close to the JVM limits and
adjust its memory usage accordingly (reducing buffers, swapping messages to disk...)?

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