11:53:25,993 ERROR [org.jgroups.protocols.UDP] (OOB-13,shared=udp) failed handling incoming message: java.lang.NullPointerException
	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) [rt.jar:1.6.0_45]
	at org.jgroups.protocols.UNICAST2.up(UNICAST2.java:432)
	at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:645)
	at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:147)
	at org.jgroups.protocols.FD.up(FD.java:253)
	at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:288)
	at org.jgroups.protocols.MERGE3.up(MERGE3.java:290)
	at org.jgroups.protocols.Discovery.up(Discovery.java:359)
	at org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2610)
	at org.jgroups.protocols.TP.passMessageUp(TP.java:1263)
	at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1825)
	at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1798)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [rt.jar:1.6.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [rt.jar:1.6.0_45]
	at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_45]