JBoss shutdown stalls in JmsServerSessionPool.teardownSessions

Issue

• JBoss fails to shutdown completely. Thread dumps show the JBoss Shutdown Hook thread stalled like so in JmsServerSessionPool.teardownSessions:

  "JBoss Shutdown Hook" daemon prio=6 tid=0x000000001d07f800 nid=0x20e0 in Object.wait() [0x000000003d3aa000]
     java.lang.Thread.State: WAITING (on object monitor)
      at java.lang.Object.wait(Native Method)
      - waiting on <0x0000000690321a10> (a java.util.ArrayList)
      at java.lang.Object.wait(Object.java:485)
      at org.jboss.resource.adapter.jms.inflow.JmsServerSessionPool.teardownSessions(JmsServerSessionPool.java:256)
      - locked <0x0000000690321a10> (a java.util.ArrayList)
      at org.jboss.resource.adapter.jms.inflow.JmsServerSessionPool.stop(JmsServerSessionPool.java:98)
      at org.jboss.resource.adapter.jms.inflow.JmsActivation.teardownSessionPool(JmsActivation.java:687)
      at org.jboss.resource.adapter.jms.inflow.JmsActivation.teardown(JmsActivation.java:375)
      at org.jboss.resource.adapter.jms.inflow.JmsActivation.stop(JmsActivation.java:255)
      at org.jboss.resource.adapter.jms.JmsResourceAdapter.endpointDeactivation(JmsResourceAdapter.java:79)
      at org.jboss.resource.deployers.RARDeployment.endpointDeactivation(RARDeployment.java:346)