Full thread dump Java HotSpot(TM) 64-Bit Server VM (1.5.0_13-b05 mixed mode):

[[ Thread processing a STATE_REQ message in STATE_TRANSFER that has
come back down the protocol stack to lock the barrier.  It is waiting
for the in_flight_threads to clear. ]]

"Incoming" prio=1 tid=0x000000004ed08930 nid=0x207 waiting on condition [0x0000000041a26000..0x0000000041a27b80]
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:118)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1841)
	at org.jgroups.protocols.BARRIER.closeBarrier(BARRIER.java:158)
	at org.jgroups.protocols.BARRIER.down(BARRIER.java:91)
	at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:639)
	at org.jgroups.protocols.UNICAST.down(UNICAST.java:437)
	at org.jgroups.protocols.pbcast.STABLE.down(STABLE.java:317)
	at org.jgroups.protocols.FRAG2.down(FRAG2.java:175)
	at org.jgroups.protocols.VIEW_SYNC.down(VIEW_SYNC.java:173)
	at org.jgroups.protocols.pbcast.GMS.down(GMS.java:838)
	at org.jgroups.protocols.FC.down(FC.java:370)
	at org.jgroups.protocols.pbcast.STATE_TRANSFER.handleStateReq(STATE_TRANSFER.java:371)
	- locked <0x00002aaab714b780> (a java.util.HashMap)
	at org.jgroups.protocols.pbcast.STATE_TRANSFER.up(STATE_TRANSFER.java:117)
	at org.jgroups.protocols.FC.up(FC.java:408)
	at org.jgroups.protocols.pbcast.GMS.up(GMS.java:767)
	at org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:161)
	at org.jgroups.protocols.FRAG2.up(FRAG2.java:205)
	at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
	at org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:579)
	at org.jgroups.protocols.UNICAST.up(UNICAST.java:250)
	at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:714)
	at org.jgroups.protocols.BARRIER.up(BARRIER.java:122)
	at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167)
	at org.jgroups.protocols.FD.up(FD.java:322)
	at org.jgroups.protocols.MERGE3.up(MERGE3.java:126)
	at org.jgroups.protocols.Discovery.up(Discovery.java:246)
	at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1535)
	at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1479)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)

[[ Thread processing another STATE_REQ message in STATE_TRANSFER that
is waiting for the above thread to release its lock on the
state_requesters HashMap.  They are in the in_flight_threads set
causing a deadlock with the top thread. ]]

"Incoming" prio=1 tid=0x0000000050259e40 nid=0x206 waiting for monitor entry [0x0000000045a67000..0x0000000045a67c00]
	at org.jgroups.protocols.pbcast.STATE_TRANSFER.handleStateReq(STATE_TRANSFER.java:358)
	- waiting to lock <0x00002aaab714b780> (a java.util.HashMap)
	at org.jgroups.protocols.pbcast.STATE_TRANSFER.up(STATE_TRANSFER.java:117)
	at org.jgroups.protocols.FC.up(FC.java:408)
	at org.jgroups.protocols.pbcast.GMS.up(GMS.java:767)
	at org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:161)
	at org.jgroups.protocols.FRAG2.up(FRAG2.java:205)
	at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
	at org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:579)
	at org.jgroups.protocols.UNICAST.up(UNICAST.java:250)
	at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:714)
	at org.jgroups.protocols.BARRIER.up(BARRIER.java:122)
	at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167)
	at org.jgroups.protocols.FD.up(FD.java:322)
	at org.jgroups.protocols.MERGE3.up(MERGE3.java:126)
	at org.jgroups.protocols.Discovery.up(Discovery.java:246)
	at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1535)
	at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1479)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)

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[[ 8 OOB, 2 Incoming, 1 UDP mcast, 1 UDP ucast all waiting for the
barrier to open.  They are in the in_flight_threads set causing a
deadlock with the top thread. ]]

"OOB" prio=1 tid=0x000000004f05d100 nid=0x1de waiting on condition [0x000000004626f000..0x000000004626fd80]
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:118)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1841)
	at org.jgroups.protocols.BARRIER.up(BARRIER.java:110)
	at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167)
	at org.jgroups.protocols.FD.up(FD.java:322)
	at org.jgroups.protocols.MERGE3.up(MERGE3.java:126)
	at org.jgroups.protocols.Discovery.up(Discovery.java:246)
	at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1535)
	at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1484)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)

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