[jboss-jira] [JBoss JIRA] Updated: (JGRP-979) TCP DataOutputStream.flush() hang

[Bulat Nigmatullin (JIRA)]

     [ https://jira.jboss.org/jira/browse/JGRP-979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bulat Nigmatullin updated JGRP-979:
-----------------------------------

    Attachment: nohup_2_node_cluster.tar.gz


2 node cluster. Both logs contains 6 thread dumps on different stage of server work.
1) Cluster just started
2) Test users connecting to cluster
3) Users stay connected to server
4) Users disconnected, cluster hangs up
5) Few minutes later
6) Even more minutes later

> TCP DataOutputStream.flush() hang
> ---------------------------------
>
>                 Key: JGRP-979
>                 URL: https://jira.jboss.org/jira/browse/JGRP-979
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.6.10.merge
>         Environment: Ubuntu Server Linux:
> $ uname -a
> Linux jabber04 2.6.27-11-generic #1 SMP Thu Jan 29 19:28:32 UTC 2009 x86_64 GNU/Linux
> $ java -version
> java version "1.6.0_10"
> Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
> Java HotSpot(TM) 64-Bit Server VM (build 11.0-b15, mixed mode)
>            Reporter: Bulat Nigmatullin
>            Assignee: Bela Ban
>             Fix For: 2.8
>
>         Attachments: flush-tcp.xml, nohup.out, nohup1.out, nohup_2_node_cluster.tar.gz
>
>
> JGroups cluster consist of 2 nodes. It uses 2 JChannel: one for config purposes, another for data transfer. Sometimes randomly servers hangs up trying to send message to cluster. I think the main reason is this:
> "Timer-3,tcp,81.19.94.71:7800" daemon prio=10 tid=0x00007f155c7a1400 nid=0x3eec runnable [0x0000000042f92000..0x0000000042f92c80]
>    java.lang.Thread.State: RUNNABLE
> 	at java.net.SocketOutputStream.socketWrite0(Native Method)
> 	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
> 	at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
> 	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> 	at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> 	- locked <0x00007f15688678f0> (a java.io.BufferedOutputStream)
> 	at java.io.DataOutputStream.flush(DataOutputStream.java:123)
> 	at org.jgroups.blocks.BasicConnectionTable$Connection.doSend(BasicConnectionTable.java:546)
> 	at org.jgroups.blocks.BasicConnectionTable$Connection._send(BasicConnectionTable.java:522)
> 	at org.jgroups.blocks.BasicConnectionTable$Connection.send(BasicConnectionTable.java:506)
> 	at org.jgroups.blocks.BasicConnectionTable.send(BasicConnectionTable.java:322)
> 	at org.jgroups.protocols.TCP.send(TCP.java:55)
> 	at org.jgroups.protocols.BasicTCP.sendToSingleMember(BasicTCP.java:219)
> 	at org.jgroups.protocols.BasicTCP.sendToAllMembers(BasicTCP.java:204)
> 	at org.jgroups.protocols.TP.doSend(TP.java:1486)
> 	at org.jgroups.protocols.TP.access$2500(TP.java:49)
> 	at org.jgroups.protocols.TP$Bundler.sendBundledMessages(TP.java:2059)
> 	at org.jgroups.protocols.TP$Bundler.access$2900(TP.java:1951)
> 	at org.jgroups.protocols.TP$Bundler$BundlingTimer.run(TP.java:2088)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> 	at java.lang.Thread.run(Thread.java:636)
> I've done few thread dumps during 30 minutes and this thread was in this state in every dump. 
> See full thread dump in attachment.
> P.S. In log file OpenJDK used, but switch to Sun JDK result in the same errors.
> $ java -version
> java version "1.6.0_0"
> IcedTea6 1.3.1 (6b12-0ubuntu6.4) Runtime Environment (build 1.6.0_0-b12)
> OpenJDK 64-Bit Server VM (build 1.6.0_0-b12, mixed mode)

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