Update: When I set debug = true in jboss-log4j.xml configuration file I got this return in line: Adding appender named ... Hope this would help. log4j: Adding appender named [ASYNC] to category [root]. Exception in thread "Session pool worker" java.lang.NullPointerException at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassLoader.java:623) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:467) at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:408) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at com.documentum.fc.client.impl.session.Session.disconnect(Session.java:237) at com.documentum.fc.client.impl.session.SessionPool.disconnectSessions(SessionPool.java:111) at com.documentum.fc.client.impl.session.SessionPool.flush(SessionPool.java:134) at com.documentum.fc.client.impl.session.SessionPool.flushAllPools(SessionPool.java:190) at com.documentum.fc.client.impl.session.SessionPool$ExpirationThread.run(SessionPool.java:246) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4196851#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...