Failures to connect to HornetQ Human Task Server after upgrading to BRMS 5.3.1

Issue

• After upgrading to JBoss Enterprise BRMS 5.3.1 the connection to Task Server is no longer working, and throwing the following exception:

[main] ERROR service.hornetq.HornetQTaskClientConnector.connect  - Unable to connect to server using configuration org-hornetq-core-remoting-impl-netty-NettyConnectorFactory?port=5446&host=127-0-0-1
java.lang.NullPointerException
    at org.jbpm.task.service.hornetq.HornetQTaskClientConnector.write(HornetQTaskClientConnector.java:170)
    at org.jbpm.task.service.TaskClient.registerForEvent(TaskClient.java:576)
    at org.jbpm.task.service.hornetq.CommandBasedHornetQWSHumanTaskHandler.connect(CommandBasedHornetQWSHumanTaskHandler.java:101)
    at com.sample.ProcessMain.linkTaskHandler(ProcessMain.java:125)
    at com.sample.ProcessMain.main(ProcessMain.java:61)