NullPointerException during HornetQ shutdown

Issue

• We are seeing the following NullPointerException at shutdown:

WARN  [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC000004: Failure during stop of service jboss.messaging.default: java.lang.RuntimeException: JBAS011643: Failed to shutdown HornetQ server
        at org.jboss.as.messaging.HornetQService.stop(HornetQService.java:303)
        at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:2088) [jboss-msc-1.1.5.Final-redhat-1.jar:1.1.5.Final-redhat-1]
        at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:2049) [jboss-msc-1.1.5.Final-redhat-1.jar:1.1.5.Final-redhat-1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
        at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]
Caused by: java.lang.NullPointerException
        at org.jboss.as.messaging.HornetQService.stop(HornetQService.java:294)
....