Hello,
I am experiencing a similar issue with JBoss 4.2.3 and JBossWS 3.1.0. By upgrading the JBossWS to 3.1.1 was fixing the leak but introduced a side effect with null pointer under load.
Does anyone have a proper receipe for those issues without the change of JBoss AS 4.2.3 ?
For more details please refer the below thread: http://community.jboss.org/thread/171831