JBoss shutdown hangs in JIoEndpoint.unlockAccept

Issue

• JBoss stalls in JIoEndpoint.unlockAccept when trying to pause a JBossWeb connector during shutdown:

"JBoss Shutdown Hook" daemon prio=10 tid=0x000000005ed8b000 nid=0x77e2 runnable [0x0000000047cfc000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
    - locked <0x00000007fc136c90> (a java.net.SocksSocketImpl)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:211)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at java.net.Socket.connect(Socket.java:478)
    at java.net.Socket. (Socket.java:375)
    at java.net.Socket. (Socket.java:218)
    at org.apache.tomcat.util.net.JIoEndpoint.unlockAccept(JIoEndpoint.java:595)
    at org.apache.tomcat.util.net.JIoEndpoint.pause(JIoEndpoint.java:548)
    at org.apache.coyote.http11.Http11Protocol.pause(Http11Protocol.java:213)