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http://issues.apache.org/jira/browse/GERONIMO-1177?page=comments#action_12357726
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David Jencks commented on GERONIMO-1177:
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Jeff, you missed the new files
Adding         
modules/common/src/java/org/apache/geronimo/common/GeronimoEnvironment.java
Adding         
modules/common/src/test/org/apache/geronimo/common/GeronimoEnvironmentTest.java
Transmitting file data ..
Committed revision 344443.

> URLJarFile memory leak
> ----------------------
>
>          Key: GERONIMO-1177
>          URL: http://issues.apache.org/jira/browse/GERONIMO-1177
>      Project: Geronimo
>         Type: Bug
>   Components: common
>     Versions: 1.0-M5
>  Environment: Win XP/ JDK 1.4.2
>     Reporter: Kevan Miller
>     Assignee: Jeff Genender
>      Fix For: 1.0
>  Attachments: urljarfile.patch
>
> There is a Sun bug which is causing a memory leak of URLJarFile instances in 
> Geronimo. The problem is caused by 
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4167874 -- 
> sun.net.www.protocol.jar.JarFileFactory will hold onto strong references to 
> all URLJarFile instances. So URLJarFiles can never be GCed. This means that 
> for every deploy/undeploy of an application, you'll leak URLJarFiles.
> The problem can be avoided by calling 
> URLConnection.setDefaultUseCaches(false); This will turn off the caching in 
> JarFileFactory. 
> I have a fix which adds a GeronimoEnvironment class that can be used to 
> perform common environment setup for server, client, and deployer processes. 
> GeronimoEnvironment.init(); is invoked as appropriate from these three 
> process environments. init() currently only sets DefaultUseCaches to false. 
> There may be other functions which we could move there, but I didn't 
> investigate too deeply...
> Note that setDefaultUseCaches(false) is a "global" setting. So it affects the 
> entire runtime. URLConnection.setUseCaches(false) does not fix the problem.
> I'll post my patch, shortly...

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