[QPID-3251] NoClassDefFoundError while integrating with WSO2

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Later
• Affects Version/s: 0.10
• Fix Version/s: JIRA Cleanup
• Component/s: Java Common, JMS AMQP 0-x
• Labels: packaging

Environment

Windows XP, Intel Core I5, 4 GB Ram

• Assignee: Unassigned
• Reporter: Swaroop Rath
• Created: 09/May/11 16:58
• Updated: 05/Sep/11 21:45
• Resolved: 05/Sep/11 21:45

Description

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