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From "Swaroop Rath (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-3251) NoClassDefFoundError while integrating with WSO2
Date Mon, 09 May 2011 16:59:03 GMT
NoClassDefFoundError while integrating with WSO2
------------------------------------------------

                 Key: QPID-3251
                 URL: https://issues.apache.org/jira/browse/QPID-3251
             Project: Qpid
          Issue Type: Bug
          Components: Java Client, Java Common
    Affects Versions: 0.10
         Environment: Windows XP, Intel Core I5, 4 GB Ram
            Reporter: Swaroop Rath


Hi 

 Common classes related to Apache framework are packed in qpid-common-0.10.jar. WSO2-ESB is
an enterprise service bus built on top of Apache framework. So it shares apache common classes.

       While integrating QPid and WSO2, we had to copy Qpid client classes into WSO2 Server
classpath. On WSO2 This resulted in "NoClassDefFoundError" error. I checked that "AMQCodecFactory"
does indeed exist in "qpid-common-0.10.jar". We suspect that the problem is due to classes
(common to Apache common) being replicated. WSO2 has built a custom qpid-common-merger.jar
to fix this problem in earlier releases. Link -  http://people.apache.org/~lahiru/qpid-common-merged-0.6.jar
This is described in http://wso2.org/library/knowledge-base/2010/11/wso2-esb-apache-qpid-setup-guide.


 We suggest decomposing qpid-common-0.10.jar into smaller and more coherent packages. This
would enable users to select specific jars while integrating with other Apache applications.
This will eliminate the need of dismantling qpid-common-x.x.jar and building a qpid-common-merged-x.x.jar.

WSO2 defect link - 
https://wso2.org/jira/browse/ESBJAVA-770 

WSO2 Server start up exception stack trace - 

[2011-05-06 10:59:44,475] ERROR - NativeWorkerPool Uncaught exception
java.lang.NoClassDefFoundError: org/apache/qpid/codec/AMQCodecFactory
        at org.apache.qpid.client.protocol.AMQProtocolHandler.<init>(AMQProtocol
Handler.java:191)
        at org.apache.qpid.client.AMQConnection.<init>(AMQConnection.java:382)
        at org.apache.qpid.client.AMQConnectionFactory.createConnection(AMQConne
ctionFactory.java:276)
        at org.apache.axis2.transport.jms.JMSUtils.createConnection(JMSUtils.jav
a:579)
        at org.apache.axis2.transport.jms.ServiceTaskManager$MessageListenerTask
.createConnection(ServiceTaskManager.java:803)
        at org.apache.axis2.transport.jms.ServiceTaskManager$MessageListenerTask
.getConnection(ServiceTaskManager.java:688)
        at org.apache.axis2.transport.jms.ServiceTaskManager$MessageListenerTask
.receiveMessage(ServiceTaskManager.java:487)
        at org.apache.axis2.transport.jms.ServiceTaskManager$MessageListenerTask
.run(ServiceTaskManager.java:412)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(Native
WorkerPool.java:58)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor


Thanks
Swaroop Rath


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