[jboss-jira] [JBoss JIRA] Created: (JBAS-9397) Memory leak in EJB3.1 no interface view for stateful beans

[Jürgen Koras (JIRA)]

Memory leak in EJB3.1 no interface view for stateful beans
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                 Key: JBAS-9397
                 URL: https://issues.jboss.org/browse/JBAS-9397
             Project: Legacy JBoss Application Server 6 
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: EJB
    Affects Versions: 6.0.0.Final
         Environment: All platforms
            Reporter: Jürgen Koras
            Assignee: Carlo de Wolf
            Priority: Critical


Using a stateful no-interface bean causes a memory leak in PermGen space. This can easily be reproduced by creating and removing such a bean. On my machine it fails after 22500 instances.

The problem is that for each instance of a bean a new Proxy-class is generated.

This is done using javassist framework in the class org.jboss.ejb3.proxy.javassist.JavassistProxyFactory in method createProxy(Class[], InvocationHandler). Here the depreciated javassist method (instance).setHandler(...) is used. Due to documentation (http://www.csg.is.titech.ac.jp/~chiba/javassist/html/javassist/util/proxy/ProxyFactory.html) this call deactivates the cache!

The solution is simply to remove that call and pass the handler right in the (instance).create(...) method.

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