[jboss-jira] [JBoss JIRA] Commented: (JGRP-532) TCP: hangs without FC

[Bela Ban (JIRA)]

    [ http://jira.jboss.com/jira/browse/JGRP-532?page=comments#action_12365524 ] 
            
Bela Ban commented on JGRP-532:
-------------------------------

We need to revert the rejection level to "run", otherwise performance is worse. The stack trace below shows that STABLE needs to release the lock on NakReceiverWindow before passing down the message, which would prevent the deadlock. This is related to 535.

"Incoming Thread,perf,192.168.0.5:7801" daemon prio=10 tid=0x00002aaacba7ac00 nid=0x24b6 waiting on condition [0x0000000040aa9000..0x0000000040aa9d10]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00002aaab4046dd8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1889)
        at java.util.concurrent.LinkedBlockingQueue.put(LinkedBlockingQueue.java:254)
        at org.jgroups.blocks.BasicConnectionTable$Connection.send(BasicConnectionTable.java:433)
        at org.jgroups.blocks.BasicConnectionTable.send(BasicConnectionTable.java:243)
        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:1187)
        at org.jgroups.protocols.TP.send(TP.java:1177)
        at org.jgroups.protocols.TP.down(TP.java:944)
        at org.jgroups.protocols.Discovery.down(Discovery.java:321)
        at org.jgroups.protocols.MERGE2.down(MERGE2.java:184)
        at org.jgroups.protocols.FD_SOCK.down(FD_SOCK.java:403)
        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:97)
        at org.jgroups.protocols.pbcast.NAKACK.send(NAKACK.java:648)
        at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:438)
        at org.jgroups.protocols.UNICAST.down(UNICAST.java:430)
        at org.jgroups.protocols.pbcast.STABLE.sendStableMessage(STABLE.java:640)
        at org.jgroups.protocols.pbcast.STABLE.handleRegularMessage(STABLE.java:286)
        at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:233)
        at org.jgroups.protocols.UNICAST.up(UNICAST.java:263)
        at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:720)
        - locked <0x00002aaab404afc0> (a org.jgroups.stack.NakReceiverWindow)
        at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:546)
        at org.jgroups.protocols.BARRIER.up(BARRIER.java:122)
        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:298)
        at org.jgroups.protocols.MERGE2.up(MERGE2.java:145)
        at org.jgroups.protocols.Discovery.up(Discovery.java:220)
        at org.jgroups.protocols.MPING.up(MPING.java:151)
        at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1542)
        at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1491)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)



> TCP: hangs without FC
> ---------------------
>
>                 Key: JGRP-532
>                 URL: http://jira.jboss.com/jira/browse/JGRP-532
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.5
>
>         Attachments: config.txt, tcp.xml, tmp.txt
>
>
> Usually, FC is enabled, but when FC is not present, perf.Test with 2 senders and the attached tcp.xml/config.txt hangs. Stack trace attached too.

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