activemq-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ramit Arora <ramit.ar...@gmail.com>
Subject Null Pointer Exception on broker
Date Fri, 14 Mar 2008 19:28:12 GMT

Hi,
I am testing ActiveMQ 5.0 using a Perl Publisher (using Net::Stomp) & Java
Subscribers (Openwire). It works well when the number of subscribers is low
(1 or 2) but when I increase the number of subscribers to around 10, I face
the following problem:

A subscriber shows the following stack trace
Exception in thread "ActiveMQ Transport:
tcp://xx.yy.zz.com/nnn.nn.nnn.nn:61616" java.lang.ClassCastException:
org.apache.activemq.command.BrokerId can not be cast to
org.apache.activemq.command.ConsumerId
        at
org.apache.activemq.openwire.v3.MessageMarshaller.tightUnmarshal(MessageMarshaller.java:71)
        at
org.apache.activemq.openwire.v3.ActiveMQMessageMarshaller.tightUnmarshal(ActiveMQMessageMarshaller.java:67)
        at
org.apache.activemq.openwire.v3.ActiveMQTextMessageMarshaller.tightUnmarshal(ActiveMQTextMessageMarshaller.java:67)
        at
org.apache.activemq.openwire.OpenWireFormat.tightUnmarshalNestedObject(OpenWireFormat.java:452)
        at
org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightUnmarsalNestedObject(BaseDataStreamMarshaller.java:127)
        at
org.apache.activemq.openwire.v3.MessageDispatchMarshaller.tightUnmarshal(MessageDispatchMarshaller.java:72)
        at
org.apache.activemq.openwire.OpenWireFormat.doUnmarshal(OpenWireFormat.java:361)
        at
org.apache.activemq.openwire.OpenWireFormat.unmarshal(OpenWireFormat.java:275)
        at
org.apache.activemq.transport.tcp.TcpTransport.readCommand(TcpTransport.java:192)
        at
org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:184)
        at
org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java: 172)
        at java.lang.Thread.run(Thread.java:619)

The broker shows the following stack trace:
Exception in thread "ActiveMQ Connection Dispatcher: /nnn.nn.nn.nn:39997"
java.lang.NullPointerException
        at java.lang.System.arraycopy(Native Method)
        at
org.apache.activemq.transport.tcp.TcpBufferedOutputStream.write(TcpBufferedOutputStream.java:89)
        at java.io.DataOutputStream.write(DataOutputStream.java:90)
        at
org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightMarshalByteSequence2(BaseDataStreamMarshaller.java:433)
        at
org.apache.activemq.openwire.v3.MessageMarshaller.tightMarshal2(MessageMarshaller.java:173)
        at
org.apache.activemq.openwire.v3.ActiveMQMessageMarshaller.tightMarshal2(ActiveMQMessageMarshaller.java:90)
        at
org.apache.activemq.openwire.v3.ActiveMQTextMessageMarshaller.tightMarshal2(ActiveMQTextMessageMarshaller.java:90)
        at
org.apache.activemq.openwire.OpenWireFormat.tightMarshalNestedObject2(OpenWireFormat.java:423)
        at
org.apache.activemq.openwire.v3.BaseDataStreamMarshaller.tightMarshalNestedObject2(BaseDataStreamMarshaller.java:137)
        at
org.apache.activemq.openwire.v3.MessageDispatchMarshaller.tightMarshal2(MessageDispatchMarshaller.java:106)
        at
org.apache.activemq.openwire.OpenWireFormat.marshal(OpenWireFormat.java:238)
        at
org.apache.activemq.transport.tcp.TcpTransport.oneway(TcpTransport.java:153)
        at
org.apache.activemq.transport.InactivityMonitor.oneway(InactivityMonitor.java:157)
        at
org.apache.activemq.transport.TransportFilter.oneway(TransportFilter.java:82)
        at
org.apache.activemq.transport.WireFormatNegotiator.oneway(WireFormatNegotiator.java:91)
        at
org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:40)
        at
org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1151)
        at
org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:766)
        at
org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:801)
        at
org.apache.activemq.thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:98)
        at
org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:36)

The broker & the subscriber keep running after this, but the broker does not
deliver messages to that subscriber. Other subscribers work fine. This
problem is repeatedly occuring. I am using SunOS 5.10 on a machine with 8
processors & 32 GB of RAM.
Please help!

TIA,
Ramit

 
-- 
View this message in context: http://www.nabble.com/Null-Pointer-Exception-on-broker-tp16048936s2354p16048936.html
Sent from the ActiveMQ - User mailing list archive at Nabble.com.


Mime
View raw message