Re: [xmlblaster] dead lock

[Marcel Ruff <mr at marcelruff.info>]

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 ?
>   
Yes, this is a dead lock,
i have coded now a lock free variant but i need some more testing if the
auto-disconnect (from ping timer) and reconnect (from your client)
simultaneously have other impacts ...
I'll send a followup as soon as the fix is committed,

Marcel
> 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