Getting error while transferring Data/response from HTTP to UDP protocol through Axis2 webservice in WSO2 ESB - udp

Question

I am new to WSO2 ESB and stuck with one problem of Transport level information does not match with SOAP Message namespace URI.
Actually i want to transfer request/message through UDP transport, for that i have created a Proxy service which transfers request to actual web service through UDP transport.
it seems like :
<proxy xmlns="http://ws.apache.org/ns/synapse" name="example1"
transports="https http udp"
startOnLoad="true"
trace="disable">
<target>
<inSequence>
<log level="full"/>
<send>
<endpoint>
<address uri="udp://192.168.6.200:3333/services/xyzService?contentType=application/soap+xml">
<enableAddressing separateListener="true"/>
</address>
</endpoint>
</send>
</inSequence>
<outSequence>
<log level="full" />
<send/>
</outSequence>
</target>
<publishWSDL uri="file:repository/WSO2-ws/ABC.wsdl"/>
</proxy>
Other Service get message/request through UDP and transfer to actual WebService.
it seems like:
<proxy xmlns="http://ws.apache.org/ns/synapse" name="example2" transports="udp"
startOnLoad="true"
trace="disable">
<target>
<endpoint>
<address uri="http://192.168.6.200:8280/services/abc-demo"/>
</endpoint>
<outSequence>
<log level="full"/>
<send />
</outSequence>
</target>
</proxy>
while transferring the Response back to UDP from actual WebService its thrown error like :
[2013-11-26 15:06:47,375] ERROR - ProcessPacketTask Error during processing of datagram:
org.apache.axiom.soap.SOAPProcessingException: Transport level information does not match with SOAP Message namespace URI
at org.apache.axis2.builder.BuilderUtil.validateSOAPVersion(BuilderUtil.java:745)
at org.apache.axis2.builder.SOAPBuilder.processDocument(SOAPBuilder.java:58)
at org.apache.axis2.transport.TransportUtils.createDocumentElement(TransportUtils.java:180)
at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:146)
at org.apache.axis2.transport.base.datagram.ProcessPacketTask.run(ProcessPacketTask.java:63)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
I haven't any idea why it's happened ??
Please suggest me if am doing in wrong way or some configuration are not done properly.
Any help is greatly appreciated.
I look forward to hearing from you soon.

Answer 1

Follow this sample which shows switching between UDP and HTTP.
As mentioned in there, you need to add the UDP listener and sender configuration to <ESB_HOME>/repository/conf/axis2/axis2.xml file.
<transportReceiver name="udp" class="org.apache.axis2.transport.udp.UDPListener"/>
<transportSender name="udp" class="org.apache.axis2.transport.udp.UDPSender"/>
And specify the UDP listening port and content type in the proxy service.
<parameter name="transport.udp.port">9999</parameter>
<parameter name="transport.udp.contentType">text/xml</parameter>