[jira] [Closed] (JAMES-3026) OpenJPA memory leak

["Benoit Tellier (Jira)" <se...@james.apache.org>]

     [ https://issues.apache.org/jira/browse/JAMES-3026?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoit Tellier closed JAMES-3026.
---------------------------------
    Fix Version/s: 3.5.0
       Resolution: Fixed

> OpenJPA memory leak
> -------------------
>
>                 Key: JAMES-3026
>                 URL: https://issues.apache.org/jira/browse/JAMES-3026
>             Project: James Server
>          Issue Type: Bug
>          Components: jpa
>    Affects Versions: 3.4.0
>            Reporter: Simon Levesque
>            Priority: Major
>             Fix For: 3.5.0
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Initially, I got this error after running for about 1.5 days:
> {noformat}
> 21:53:38.455 [smtpserver-executor-82] ERROR o.a.j.p.n.BasicChannelUpstreamHandler - Unable to process request
>  java.lang.OutOfMemoryError: GC overhead limit exceeded{noformat}
> h1. Try #1
> I added more memory with "-Xmx", but that only took a bit more hours to get out of memory.
> h1. Try #2
> I checked the heap map and found:
> {noformat}
> 38,405 instances of "org.apache.openjpa.kernel.FinalizingBrokerImpl", loaded by "sun.misc.Launcher$AppClassLoader @ 0x6c041ee08" occupy 1,198,987,104 (91.22%) bytes. These instances are referenced from one instance of "java.util.concurrent.ConcurrentHashMap$Node[]", loaded by "<system class loader>"
> Keywords
>  sun.misc.Launcher$AppClassLoader @ 0x6c041ee08
>  java.util.concurrent.ConcurrentHashMap$Node[]
>  org.apache.openjpa.kernel.FinalizingBrokerImpl
> {noformat}
>  
>  Which lead me to this article [http://chathuriwimalasena.blogspot.com/2014/06/best-practices-when-using-apache.html] . 
> In summary, before closing any connection, we should check if it contains an active transaction and roll it back.



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