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https://issues.apache.org/jira/browse/AXIS2-4722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870379#action_12870379
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Amila Chinthaka Suriarachchi commented on AXIS2-4722:
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This is what I am thinking.
If you have enable udp transport globally what you going to display in the wsdl
endpoint? you may display tcp://host:port/servicePath. isn't this a hack? here
we have we have define some thing to work with our axis2 dispatchers. (both
Addressing and soap body based dispatchers assume this)
on the other hand thinking in wsdl way always an endpoint is associated with a
service. So service dispatching should happen with the transport properties.
I am not clear about your first point. There are transport which has an
explicit back channel (eg. http, tcp, udp) with which you can do asynchronous
without any problem. But for smtp, jms there are no such back channels so you
need to use some other transport specific mechanism or addressing.
> NPE Thrown When Enabling the UDP Listener Globally
> --------------------------------------------------
>
> Key: AXIS2-4722
> URL: https://issues.apache.org/jira/browse/AXIS2-4722
> Project: Axis2
> Issue Type: Bug
> Components: transports
> Reporter: Hiranya Jayathilaka
> Fix For: 1.6
>
> Attachments: AXIS2-4722-update1.patch, AXIS2-4722.patch
>
>
> Steps to reproduce:
> 1. Enable the UDP listener in the axis2.xml by adding the following entry:
> <transportReceiver name="udp"
> class="org.apache.axis2.transport.udp.UDPListener">
> <parameter name="transport.udp.port">9999</parameter>
> <parameter name="transport.udp.contentType">text/xml</parameter>
> </transportReceiver>
> 2. Start the server and following NPE will be thrown:
> 2010-05-20 16:02:43,890 [-] [main] ERROR ListenerManager Couldn't initialize
> the udptransport listener
> java.lang.NullPointerException
> at
> org.apache.axis2.transport.base.datagram.AbstractDatagramTransportListener.startEndpoint(AbstractDatagramTransportListener.java:75)
> at
> org.apache.axis2.transport.base.datagram.AbstractDatagramTransportListener.startEndpoint(AbstractDatagramTransportListener.java:31)
> at
> org.apache.axis2.transport.base.AbstractTransportListenerEx.init(AbstractTransportListenerEx.java:58)
> at
> org.apache.axis2.transport.base.datagram.AbstractDatagramTransportListener.init(AbstractDatagramTransportListener.java:41)
> at org.apache.axis2.engine.ListenerManager.init(ListenerManager.java:83)
> at
> samples.util.SampleAxis2ServerManager.start(SampleAxis2ServerManager.java:110)
> at samples.util.SampleAxis2Server.startServer(SampleAxis2Server.java:61)
> at samples.util.SampleAxis2Server.main(SampleAxis2Server.java:40)
> I was able to reproduce this issue with Synapse and the sample Axis2 server
> that comes with Synapse. I will soon attach a patch.
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