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From "David Jencks (JIRA)" <...@geronimo.apache.org>
Subject [jira] Commented: (GERONIMO-1177) URLJarFile memory leak
Date Tue, 15 Nov 2005 21:16:28 GMT
    [ http://issues.apache.org/jira/browse/GERONIMO-1177?page=comments#action_12357726 ] 

David Jencks commented on GERONIMO-1177:
----------------------------------------

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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