I got the below stack trace and could not get what lead to this issue.

INFO | jvm 1 | 2014/11/11 15:05:59 | Caused by: java.lang.NullPointerException
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.invocation.MarshallingInvokerInterceptor.invoke(MarshallingInvokerInterceptor.java:63)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.proxy.ejb.SecurityContextInterceptor.invoke(SecurityContextInterceptor.java:64)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:68)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:112)
INFO | jvm 1 | 2014/11/11 15:05:59 | at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:101)
INFO | jvm 1 | 2014/11/11 15:05:59 | at com.sun.proxy.$Proxy67.remove(Unknown Source)