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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Async error occurred: java.lang.NullPoint erException
Date Mon, 12 Feb 2007 12:57:21 GMT
Unfortunately this is looking suspiciously like an inter-version
interop problem - its looking like the Client's ConnectionInfo does
not appear to have a ConnectionId when the broker reads it.
Unfortunately it looks from this log like 4.0.1 and 4.1 do not
interoperate :(


On 2/12/07, Thomas Swindells <tswindells@ndsuk.com> wrote:
>
> Appologies if this has already been recorded in a defect somewhere.
>
> I am running an ActiveMQ 4.1 broker. Another team have developed a client
> based upon ActiveMQ 4.0.1. They are running it within Tomcat and were having
> probems with their service starting as it was failing to connect to my
> broker. When configured to use their broker it does work.
>
> I've turned on the debug output and it appears to be due to the 4.1 broker
> generating a null pointer exception. Obviously I'm going to get them to
> upgrade but it would appear that there is some issue which needs looking
> into.
>
> Thanks,
> Thomas
>
> DEBUG WireFormatNegotiator           - Sending: WireFormatInfo { version=2,
> properties={TightEncodingEnabled=true, CacheSize=1024,
> TcpNoDelayEnabled=true, SizePrefixDisabled=false, StackTraceEnabled=true,
> MaxInactivityDuration=30000, CacheEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
> DEBUG WireFormatNegotiator           - Received WireFormat: WireFormatInfo {
> version=1, properties={StackTraceEnabled=true, TightEncodingEnabled=true,
> TcpNoDelayEnabled=true, SizePrefixDisabled=false,
> MaxInactivityDuration=30000, CacheEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
> DEBUG WireFormatNegotiator           - tcp:///172.18.200.204:1662 before
> negotiation: OpenWireFormat{version=2, cacheEnabled=false,
> stackTraceEnabled=false, tightEncodingEnabled=false,
> sizePrefixDisabled=false}
> DEBUG WireFormatNegotiator           - tcp:///172.18.200.204:1662 after
> negotiation: OpenWireFormat{version=1, cacheEnabled=true,
> stackTraceEnabled=true, tightEncodingEnabled=true, sizePrefixDisabled=false}
> DEBUG Service                        - Async error occurred:
> java.lang.NullPointerException
> java.lang.NullPointerException
>         at
> edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap.hash(ConcurrentHashMap.java:160)
>         at
> edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:767)
>         at
> org.apache.activemq.broker.TransportConnection.processAddConnection(TransportConnection.java:651)
>         at
> org.apache.activemq.broker.jmx.ManagedTransportConnection.processAddConnection(ManagedTransportConnection.java:86)
>         at
> org.apache.activemq.command.ConnectionInfo.visit(ConnectionInfo.java:121)
>         at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:284)
>         at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:177)
>         at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:65)
>         at
> org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:133)
>         at
> org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:122)
>         at
> org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84)
>         at
> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:137)
>         at java.lang.Thread.run(Unknown Source)
> DEBUG Transport                      - Transport failed:
> java.io.IOException: Unknown data type: 68
> java.io.IOException: Unknown data type: 68
>         at
> org.apache.activemq.openwire.OpenWireFormat.doUnmarshal(OpenWireFormat.java:342)
>         at
> org.apache.activemq.openwire.OpenWireFormat.unmarshal(OpenWireFormat.java:273)
>         at
> org.apache.activemq.transport.tcp.TcpTransport.readCommand(TcpTransport.java:156)
>         at
> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:136)
>         at java.lang.Thread.run(Unknown Source)
> DEBUG TransportConnection            - Stopping connection:
> /172.18.200.204:1662
> DEBUG TransportConnection            - Stopped connection:
> /172.18.200.204:1662
> --
> View this message in context: http://www.nabble.com/Async-error-occurred%3A-java.lang.NullPoint--erException-tf3213417s2354.html#a8923656
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 

James
-------
http://radio.weblogs.com/0112098/

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