Found one Java-level deadlock:
=============================
"ConnectionTable.Connection.Receiver [10.68.28.33:7800 - 10.68.0.33:41796]":
waiting to lock monitor 0x080ca6dc (object 0xdec9a0c8, a org.jgroups.stack.NakReceiverWindow),
which is held by "Incoming Thread,perf,10.68.28.33:7800"
"Incoming Thread,perf,10.68.28.33:7800":
waiting to lock monitor 0x080ca3dc (object 0xdeb9f9e8, a java.lang.Object),
which is held by "ConnectionTable.Connection.Receiver [10.68.28.33:7800 - 10.68.0.33:41796]"

Java stack information for the threads listed above:
===================================================
"ConnectionTable.Connection.Receiver [10.68.28.33:7800 - 10.68.0.33:41796]":
at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:714)

• waiting to lock <0xdec9a0c8> (a org.jgroups.stack.NakReceiverWindow)
  at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:549)
  at org.jgroups.protocols.pbcast.NAKACK.handleXmitRsp(NAKACK.java:962)
  at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:565)
  at org.jgroups.protocols.BARRIER.up(BARRIER.java:119)
  at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:154)
  at org.jgroups.protocols.FD.up(FD.java:328)
  at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:301)
  at org.jgroups.protocols.MERGE2.up(MERGE2.java:145)
  at org.jgroups.protocols.Discovery.up(Discovery.java:224)
  at org.jgroups.protocols.MPING.up(MPING.java:151)
  at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1536)
  at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1485)
  at java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy.rejectedExecution(ThreadPoolExecutor.java:1455)
  at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:384)
  at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:867)
  at org.jgroups.protocols.TP.dispatchToThreadPool(TP.java:1050)
  at org.jgroups.protocols.TP.receive(TP.java:1021)
  at org.jgroups.protocols.BasicTCP.receive(BasicTCP.java:233)
  at org.jgroups.blocks.BasicConnectionTable.receive(BasicConnectionTable.java:163)
• locked <0xdeb9f9e8> (a java.lang.Object)
  at org.jgroups.blocks.BasicConnectionTable$Connection.run(BasicConnectionTable.java:593)
  at java.lang.Thread.run(Thread.java:595)
  "Incoming Thread,perf,10.68.28.33:7800":
  at org.jgroups.blocks.BasicConnectionTable.receive(BasicConnectionTable.java:163)
• waiting to lock <0xdeb9f9e8> (a java.lang.Object)
  at org.jgroups.blocks.BasicConnectionTable.send(BasicConnectionTable.java:230)
  at org.jgroups.protocols.TCP.send(TCP.java:54)
  at org.jgroups.protocols.BasicTCP.sendToSingleMember(BasicTCP.java:194)
  at org.jgroups.protocols.BasicTCP.sendToAllMembers(BasicTCP.java:179)
  at org.jgroups.protocols.TP.doSend(TP.java:1189)
  at org.jgroups.protocols.TP.send(TP.java:1179)
  at org.jgroups.protocols.TP.down(TP.java:953)
  at org.jgroups.protocols.Discovery.down(Discovery.java:325)
  at org.jgroups.protocols.MERGE2.down(MERGE2.java:184)
  at org.jgroups.protocols.FD_SOCK.down(FD_SOCK.java:406)
  at org.jgroups.protocols.FD.down(FD.java:363)
  at org.jgroups.stack.Protocol.down(Protocol.java:252)
  at org.jgroups.protocols.BARRIER.down(BARRIER.java:94)
  at org.jgroups.protocols.pbcast.NAKACK.send(NAKACK.java:651)
  at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:441)
  at org.jgroups.protocols.pbcast.STABLE.sendStableMessage(STABLE.java:628)
  at org.jgroups.protocols.pbcast.STABLE.handleRegularMessage(STABLE.java:281)
  at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:223)
  at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:723)
• locked <0xdec9a0c8> (a org.jgroups.stack.NakReceiverWindow)
  at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:549)
  at org.jgroups.protocols.pbcast.NAKACK.handleXmitRsp(NAKACK.java:962)
  at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:565)
  at org.jgroups.protocols.BARRIER.up(BARRIER.java:119)
  at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:154)
  at org.jgroups.protocols.FD.up(FD.java:328)
  at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:301)
  at org.jgroups.protocols.MERGE2.up(MERGE2.java:145)
  at org.jgroups.protocols.Discovery.up(Discovery.java:224)
  at org.jgroups.protocols.MPING.up(MPING.java:151)
  at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1536)
  at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1485)
  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)

Found 1 deadlock.