JBoss crushes with OutOfMemory error when running with XA transactions that span more than one JBoss instance. The XA transaction originates in a stand alone client that starts an user transaction and then makes a call to a bean (SLSB) which in turn calls two entity beans, first entity bean is located in the same instance of JB and second entity bean is located on a remote instance of JB.
This error happens after about 4500 transactions have been performed.