Configuring session cookie config except for cookie name yields NPE in mod_cluster when registering with the proxy

/subsystem=undertow/servlet-container=default/setting=session-cookie:add(http-only=true)

2016-08-01 14:42:20,623 ERROR [org.jboss.modcluster] (UndertowEventHandlerAdapter - 1) MODCLUSTER000042: Error MEM sending STATUS command to apache-server/10.0.0.1:6666, configuration will be reset: MEM: Can't read node
2016-08-01 14:42:30,626 ERROR [org.jboss.mod_cluster.undertow] (UndertowEventHandlerAdapter - 1) null: java.lang.NullPointerException
    at org.jboss.modcluster.mcmp.impl.DefaultMCMPRequestFactory.createConfigRequest(DefaultMCMPRequestFactory.java:128)
    at org.jboss.modcluster.mcmp.impl.ResetRequestSourceImpl.getResetRequests(ResetRequestSourceImpl.java:89)
    at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:399)
    at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:365)
    at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:457)
    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)