[jboss-jira] [JBoss JIRA] (AS7-3736) javax.el.BeanELResolver.properties keeps references to undeployed classes (Class Loader leak)
Philippe Guinot created AS7-3736:
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Summary: javax.el.BeanELResolver.properties keeps references to undeployed
classes (Class Loader leak)
Key: AS7-3736
URL: https://issues.jboss.org/browse/AS7-3736
Project: Application Server 7
Issue Type: Bug
Components: EE
Affects Versions: 7.1.0.CR1b
Environment: Seam 2.2.2 application
Reporter: Philippe Guinot
Assignee: David Lloyd
This is another Class Loader leak memory issue. When class are loaded into the properties
map, they don't get unloaded at undeploy. This cause the whole application's class
loader not being garbage collected and so will result in OutOfMemoryError: PermGen space
after a few deployments.
The solution would be to call the purgeBeanClasses method at undeploy with each of the
class loader of all sub-modules of the application.
For the moment, the work around I've done was to change
{code}private static final ConcurrentHashMap<Class, BeanProperties> properties =
new ConcurrentHashMap<Class, BeanProperties>(CACHE_SIZE);
{code}to{code}
private static final Map<Class<?>, SoftReference<BeanProperties>>
properties =
Collections.synchronizedMap(new WeakHashMap<Class<?>,
SoftReference<BeanProperties>>(CACHE_SIZE));
{code}
But I'm not really sure if that's a good idea to replace the ConcurrentHashMap
with a SynchronizedMap and I had to change
{code}properties.putIfAbsent(baseClass, bps);{code}
By{code}
synchronized(properties) {
if (!properties.containsKey(baseClass))
properties.put(baseClass, new SoftReference<BeanProperties>(bps));
}
{code}
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