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RE: [xmlblaster] dead lock

To: <xmlblaster at server.xmlBlaster.org>
Subject: RE: [xmlblaster] dead lock
From: "Xavier Roques" <xRoques at infovista.com>
Date: Thu, 27 Sep 2007 11:57:40 +0200
In-reply-to: <46FA906C.9050601 at marcelruff.info>
References: 46FA3C73.3040605 at marcelruff.info <20070926124615.af31f4b0 at mail.openroadsconsulting.com> <0329C0D74DD1D64F98E6C6B43B5C7810031F9EDF at frlulms01.iv.local> <46FA906C.9050601 at marcelruff.info>
Reply-to: xmlblaster at server.xmlBlaster.org
Sender: owner-xmlblaster at server.xmlBlaster.org
Thread-index: AcgAX7NWqorcCbl0Q4yOZdcfECq3BgAeqZ2g
Thread-topic: [xmlblaster] dead lock

In my configuration, I want that the clients always try to connect back
to the Server so
the clients retries is set to -1.

But I want to be informed as soon as a client is disconnected.
That's why my configuration is 
dispatch/callback/retries=0
Otherwise I'm not informed when a client is abnormally disconnected.

So, I have a question, is there a way to know that a client has been
normally disconnected or not ?

Xavier.

> -----Original Message-----
> From: owner-xmlblaster at server.xmlBlaster.org [mailto:owner-
> xmlblaster at server.xmlBlaster.org] On Behalf Of Marcel Ruff
> Sent: mercredi 26 septembre 2007 19:02
> To: xmlblaster at server.xmlBlaster.org
> Subject: 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

Follow-Ups:
- Re: [xmlblaster] dead lock
  - From: Marcel Ruff <mr at marcelruff.info>

References:
- Re: [xmlblaster] dead lock
  - From: "David Robison" <drrobison at openroadsconsulting.com>
- RE: [xmlblaster] dead lock
  - From: "Xavier Roques" <xRoques at infovista.com>
- Re: [xmlblaster] dead lock
  - From: Marcel Ruff <mr at marcelruff.info>

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