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Re: [xmlblaster] dead lock

Xavier Roques wrote: 

Hi David,



When the dead lock occurred, I have one server with 144 connected clients.



All my clients are configured in fail safe mode and all the messages are stored in RAM, the configuration of all my agents is:

#server configuration

dispatch/callback/retries=0

--> 0 no retry: XmlBlaster will clean up the session if the client does not respond to the callback ping
if you need fail safe behaviour you should set dispatch/callback/retries=-1

regards
Marcel


dispatch/callback/delay=2000

dispatch/callback/pingInterval=2000

dispatch/callback/plugin/socket_ssl/multiThreaded=false

#client configuration

pingInterval=2000

retries=-1

delay=2000



The problem occurred after having restarted 30 of the agents running on the same box.



I hope it may help,



Xavier.





*From:* owner-xmlblaster at server.xmlBlaster.org [mailto:owner-xmlblaster at server.xmlBlaster.org] *On Behalf Of *David Robison
*Sent:* mercredi 26 septembre 2007 14:46
*To:* xmlblaster at server.xmlBlaster.org
*Subject:* Re: [xmlblaster] dead lock



Can you tell me a little more about the conditions that caused the dead lock? We are experiencing a problem that may be related (although it may be just my wacky code). Any additional information would be helpful.

David Robison

------------------------------------------------------------------------

*From:* Marcel Ruff [mailto:mr at marcelruff.info]
*To:* xmlblaster at server.xmlBlaster.org
*Sent:* Wed, 26 Sep 2007 07:03:15 -0400
*Subject:* Re: [xmlblaster] dead lock

Hi Xavier,

the dead lock is now fixed, the code is available with svn.

thanks for reporting,
Marcel


Xavier Roques wrote:
> Hi,
>
> I'm using Xmlblaster 1.6.
>
> I restarted, some connected clients and unfortunately one of my client
> never connects back :(
>
> Even if I restart several times this client, it never successes to
> connect.
>
> That's why I dumped the threads' stack on the server side and I found
> the following dead lock (see below)
>
> Is there a way to avoid it ?
>
> Thanks,
>
> Xavier.
>
>
> "XmlBlaster.ssl_socket.SSL.tcpListener-alouettebench17-agent":
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.getConnectionStatusListener
> s(DispatchManager.java:206)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - waiting to lock
> <0xdb74d9c0> (a org.xmlBlaster.util.dispatch.DispatchManager)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.toAlive(DispatchManager.jav
> a:293)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - locked <0xdb7a0930> (a
> java.lang.Object)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.updateState(Disp
> atchConnectionsHandler.java:332)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - locked <0xdb7a0f28> (a
> java.util.ArrayList)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.toAlive(Dispatch
> ConnectionsHandler.java:302)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnection.handleTransition(Dispatc
> hConnection.java:575)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - locked <0xdb7b2838> (a
> org.xmlBlaster.engine.dispatch.CbDispatchConnection)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnection.initialize(DispatchConne
> ction.java:132)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.initialize(Dispa
> tchConnectionsHandler.java:179)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - locked <0xdb7a0f28> (a
> java.util.ArrayList)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.updateProperty(DispatchMana
> ger.java:160)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.authentication.SessionInfo.updateConnectQos(SessionInfo.j
> ava:513)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.authentication.Authenticate.connect(Authenticate.java:276
> )
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.authentication.AuthenticateProtector.connect(Authenticate
> Protector.java:74)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.authentication.AuthenticateProtector.connect(Authenticate
> Protector.java:62)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.protocol.socket.HandleClient.handleMessage(HandleClient.j
> ava:266)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.protocol.socket.HandleClient$1.run(HandleClient.java:379)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker
> .runTask(ThreadPoolExecutor.java:665)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker
> .run(ThreadPoolExecutor.java:690)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> java.lang.Thread.run(Thread.java:619)
> INFO | jvm 1 | 2007/09/25 11:31:29 | "XmlBlaster.PingTimer":
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.shutdown(Dispatc
> hConnectionsHandler.java:486)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - waiting to lock
> <0xdb7a0f28> (a java.util.ArrayList)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.shutdown(DispatchManager.ja
> va:954)
> INFO | jvm 1 | 2007/09/25 11:31:29 | - locked <0xdb74d9c0> (a
> org.xmlBlaster.util.dispatch.DispatchManager)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.givingUpDelivery(DispatchMa
> nager.java:364)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchManager.toDead(DispatchManager.java
> :356)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.updateState(Disp
> atchConnectionsHandler.java:348)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnectionsHandler.toDead(DispatchC
> onnectionsHandler.java:315)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnection.handleTransition(Dispatc
> hConnection.java:632)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnection.ping(DispatchConnection.
> java:359)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.dispatch.DispatchConnection.timeout(DispatchConnecti
> on.java:423)
> INFO | jvm 1 | 2007/09/25 11:31:29 | at
> org.xmlBlaster.util.Timeout.run(Timeout.java:189)
>
>
>
>


--
Marcel Ruff
http://www.xmlBlaster.org



--
Marcel Ruff
http://www.xmlBlaster.org