JBoss host controller stalled by stop operation

Issue

• We issue a server stop. If the server shutdown stalls, we then try to kill the server, but the kill command appears to be blocked as well then. Thread dumps show the host controller waiting in the following state:

[Host Controller] "Host Controller Service Threads - 164434" prio=10 tid=0x00007fa560142800 nid=0x5e14 in Object.wait() [0x00007fa55f5f2000]
[Host Controller]    java.lang.Thread.State: WAITING (on object monitor)
[Host Controller]   at java.lang.Object.wait(Native Method)
[Host Controller]   - waiting on <0x00000000e38b1668> (a org.jboss.as.host.controller.ManagedServer)
[Host Controller]   at java.lang.Object.wait(Object.java:503)
[Host Controller]   at org.jboss.as.host.controller.ManagedServer.awaitState(ManagedServer.java:334)
[Host Controller]   - locked <0x00000000e38b1668> (a org.jboss.as.host.controller.ManagedServer)
[Host Controller]   at org.jboss.as.host.controller.ServerInventoryImpl.stopServer(ServerInventoryImpl.java:254)