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https://issues.apache.org/jira/browse/AXIS-2674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Veithen updated AXIS-2674:
----------------------------------
Labels: classloader-leak (was: )
> MethodCache does not clean properly, leading to classloader leaking
> -------------------------------------------------------------------
>
> Key: AXIS-2674
> URL: https://issues.apache.org/jira/browse/AXIS-2674
> Project: Axis
> Issue Type: Bug
> Components: Basic Architecture
> Affects Versions: 1.3, 1.4
> Reporter: David Delbecq
> Priority: Critical
> Labels: classloader-leak
>
> In org.apache.axis.utils.cache.MethodCache, the cache is handled using
> ThreadLocals. That mean each Thread calling MethodCache has it's own cache.
> However, the method
> public void clearCache() {
> Map map = (Map) cache.get();
> if (map != null) {
> map.clear();
> }
> }
> This only reset the cache of current Thread. Other Thread's cache are left
> untouched. This is a problem in an environment like tomcat, where the
> clearCache() will be called by one Thread at webapp undeploy while the caches
> have been created for various calling Http-Thread. Those HttpThread now
> contains via ThreadLocal implicit reference to content of cache, which
> contains references to classes which themself contains natural reference to
> their classloader. As such, unless you discard all Http Threads, it's
> impossible to garbage collect content of caches and as such the webapp
> classloader that is referenced by them is not garbage collected. This result
> in whole webapplication not garbage collected at undeploy.
> Possible solutions to clean whole cache:
> 1)
> public void clearCache() {
> cache = null;
> }
> 2)
> public void clearCache() {
> cache = new ThreadLocal();
> }
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