[jira] Commented: (GERONIMO-3343) Out Of Memory Error when deploying and undeploying applications

["Kevan Miller (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GERONIMO-3343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12515003 ] 

Kevan Miller commented on GERONIMO-3343:
----------------------------------------

This problem was discussed previously in GERONIMO-3305. 

There may be more problems, but I would simplify the above operations. Simply deploy/undeploy DT. You'll see a ClassLoader memory leak caused by OpenJPA. Likely that Matt's additional steps are just speeding up the memory leak.

I've had discussions about the problem on OpenJPA's dev list. A Jira was created for the problem -- https://issues.apache.org/jira/browse/OPENJPA-285. I don't think the patch attached to the issue will fix the problem. 

I had my own attempt to fix the issue. However, ran into one final problem. I don't currently see a way around the problem -- other than introducing an OpenJPA-proprietary interface to inform OpenJPA of ClassLoader lifecycle events (in particular when a ClassLoader is going away...).

I've been distracted for a bit on other issues. I'll dig up where I've gotten to...

> Out Of Memory Error when deploying and undeploying applications
> ---------------------------------------------------------------
>
>                 Key: GERONIMO-3343
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-3343
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>            Reporter: Matt Hogstrom
>             Fix For: 2.0
>
>
> Using DayTrader 2.0 if you deploy the app.
> Create the tables and populate them
> Log in and do a few trans
> Undeploy the app
> Deploy the app
> We get an out of memory error in permgen space.
> Here is the app and plan used to re-create this problem:  http://people.apache.org/~hogstrom/daytrader-2.0-SNAPSHOT/

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