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From Gary Tully <gary.tu...@gmail.com>
Subject Re: Many many "java.lang.Object cannot be cast to org.apache.activemq.command.Command"
Date Tue, 12 May 2009 17:18:30 GMT
Hi Benoit,
I just committed a change (r773986)  that will output the object that
cannot be cast to a Command which should help track this down. This
change will be in tonight's snapshot if that is of help to you.



2009/5/12 Benoitx <benoitx@yahoo.com>:
>
> Hi
>
> We seem to receive an awful lot of "Object cannot be cast to Command"
> exceptions, basically every minute or so.
>
> It seems to be chaotic on Ubuntu 8.10 32b and a bit less frequent on XP or
> so..
>
> This still happens even with 5.3-SNAPSHOT (April 17)
>
> What is the root cause of this?
>
> Any suggestion would be greatly appreciated...
>
> 1/ What is the root cause of that problem?
> 2/ Is there a patch?
> 3/ If the app was not logging an ERROR for each of those... would it work
> when all apps are running?
>
> Thanks!
>
> Benoit
>
> 2009-04-23 13:03:53,776 INFO  [network.DiscoveryNetworkConnector#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@139d891:)
> Establishing network connection from vm://appendium-jboss-server to
> tcp://localhost:27000
> 2009-04-23 13:03:53,778 DEBUG [tcp.TcpTransport#?] (Simple Discovery Agent:
> java.util.concurrent.ThreadPoolExecutor$Worker@139d891:) Stopping transport
> tcp://null:0
> 2009-04-23 13:03:53,779 DEBUG [broker.TransportConnection#?] (ActiveMQ
> Transport Initiator: vm://appendium-jboss-server#18:) stop() called in the
> middle of start(). Delaying...
> 2009-04-23 13:03:53,792 WARN  [network.DiscoveryNetworkConnector#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@139d891:)
> Could not start network bridge between: vm://appendium-jboss-server and:
> tcp://localhost:27000 due to: java.net.ConnectException: Connection refused
> 2009-04-23 13:03:53,792 DEBUG [network.DiscoveryNetworkConnector#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@139d891:)
> Start failure exception: java.net.ConnectException: Connection refused
> java.net.ConnectException: Connection refused
>        at java.net.PlainSocketImpl.socketConnect(Native Method)
>        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
>        at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
>        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
>        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
>        at java.net.Socket.connect(Socket.java:519)
>        at
> org.apache.activemq.transport.tcp.TcpTransport.connect(TcpTransport.java:435)
>        at
> org.apache.activemq.transport.tcp.TcpTransport.doStart(TcpTransport.java:401)
>        at
> org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:53)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.network.DemandForwardingBridgeSupport.start(DemandForwardingBridgeSupport.java:225)
>        at
> org.apache.activemq.network.DiscoveryNetworkConnector.onServiceAdd(DiscoveryNetworkConnector.java:114)
>        at
> org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent$1.run(SimpleDiscoveryAgent.java:165)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>        at java.lang.Thread.run(Thread.java:619)
> 2009-04-23 13:03:53,792 DEBUG [network.DemandForwardingBridge#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@139d891:)
> stopping appendium-jboss-server bridge to Unknown is disposed already ?
> false
> 2009-04-23 13:03:53,793 DEBUG [network.DemandForwardingBridge#?]
> (NetworkBridge:) Caught exception sending shutdown
> org.apache.activemq.transport.TransportDisposedIOException: Transport
> disposed.
>        at
> org.apache.activemq.transport.vm.VMTransport.oneway(VMTransport.java:74)
>        at
> org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:40)
>        at
> org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:60)
>        at
> org.apache.activemq.network.DemandForwardingBridgeSupport$5.run(DemandForwardingBridgeSupport.java:371)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>        at java.lang.Thread.run(Thread.java:619)
> 2009-04-23 13:03:53,795 INFO  [network.DemandForwardingBridge#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@139d891:)
> appendium-jboss-server bridge to Unknown stopped
> 2009-04-23 13:03:53,793 DEBUG [broker.TransportConnection#?] (ActiveMQ
> Transport Initiator: vm://appendium-jboss-server#18:) Calling the delayed
> stop()
> 2009-04-23 13:03:53,797 DEBUG [simple.SimpleDiscoveryAgent#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@32cd7f:)
> Failure occured soon after the discovery event was generated.  It will be
> clasified as a connection failure:
> org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent$SimpleDiscoveryEvent@122e0b3
> 2009-04-23 13:03:53,824 DEBUG [simple.SimpleDiscoveryAgent#?] (Simple
> Discovery Agent: java.util.concurrent.ThreadPoolExecutor$Worker@32cd7f:)
> Waiting 30000 ms before attepting to reconnect.
> 2009-04-23 13:03:53,824 DEBUG [broker.TransportConnection#?] (ActiveMQ
> Transport Stopper: vm://appendium-jboss-server#18:) Stopping connection:
> vm://appendium-jboss-server#18
> 2009-04-23 13:03:53,859 DEBUG [broker.TransportConnection#?] (ActiveMQ
> Transport Stopper: vm://appendium-jboss-server#18:) Stopped transport:
> vm://appendium-jboss-server#18
> 2009-04-23 13:03:53,862 DEBUG [broker.TransportConnection#?] (ActiveMQ
> Transport Stopper: vm://appendium-jboss-server#18:) Connection Stopped:
> vm://appendium-jboss-server#18
> 2009-04-23 13:03:53,863 ERROR [broker.TransportConnector#?] (ActiveMQ
> Transport Initiator: vm://appendium-jboss-server#18:) Could not accept
> connection : java.lang.Object cannot be cast to
> org.apache.activemq.command.Command
> 2009-04-23 13:03:53,863 DEBUG [broker.TransportConnector#?] (ActiveMQ
> Transport Initiator: vm://appendium-jboss-server#18:) Reason:
> java.lang.Object cannot be cast to org.apache.activemq.command.Command
> java.lang.ClassCastException: java.lang.Object cannot be cast to
> org.apache.activemq.command.Command
>        at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:89)
>        at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68)
>        at
> org.apache.activemq.transport.vm.VMTransport.start(VMTransport.java:126)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>        at
> org.apache.activemq.broker.TransportConnection.start(TransportConnection.java:880)
>        at
> org.apache.activemq.broker.TransportConnector$1$1.run(TransportConnector.java:213)
>
>
>
>
> -----
> Thanks & Regards,
>
> Benoit
>
> http://www.Appendium.com   http://objectlab.blogspot.com
>
> --
> View this message in context: http://www.nabble.com/Many-many-%22java.lang.Object-cannot-be-cast-to-org.apache.activemq.command.Command%22-tp23504988p23504988.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>



-- 
http://blog.garytully.com

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