To enable the UDP transport for samples, simple open the file repository/conf/axis2.xml in a text editor and add the following transport configurations. UDP transport component is shipped with WSO2 ESB by default.
<transportReceiver name="udp"/> <transportSender name="udp"/>
If you wish to use the sample Axis2 client to send UDP messages, you have to uncomment the UDP transport sender configuration in the samples/axis2Client/client_repo/conf/axis2.xml file.