NPE in mod_cluster stopping

2017-01-11 08:29:19,989 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-3) WFLYUT0004: Undertow 1.4.8.Final-redhat-1 stopping
2017-01-11 08:29:20,108 ERROR [org.jboss.mod_cluster.undertow] (UndertowEventHandlerAdapter - 1) null: java.lang.NullPointerException
	at org.jboss.modcluster.ModClusterService.connectionEstablished(ModClusterService.java:305)
	at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:392)
	at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:365)
	at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:454)
	at org.wildfly.mod_cluster.undertow.UndertowEventHandlerAdapter.run(UndertowEventHandlerAdapter.java:179)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
	at org.jboss.threads.JBossThread.run(JBossThread.java:320)