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Date: Sun, 23 May 2010 07:37:17 -0400 (EDT)
From: "Andreas Veithen (JIRA)" <jira@apache.org>
To: java-dev@axis.apache.org
Subject: [jira] Issue Comment Edited: (AXIS2-4722) NPE Thrown When Enabling
 the UDP Listener Globally
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    [ https://issues.apache.org/jira/browse/AXIS2-4722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870390#action_12870390 ] 

Andreas Veithen edited comment on AXIS2-4722 at 5/23/10 7:35 AM:
-----------------------------------------------------------------

> Don't we already do this with HTTP transports?

Yes and no. There is one important difference. In HTTP, the information is exchanged at the transport protocol level (in the HTTP request line). For UDP and TCP (as implemented in Axis2) the servicePath information is not exchanged at the transport protocol level, but at the SOAP level (assuming that WS-Addressing is enabled).

      was (Author: veithen):
    > Don't we already do this with HTTP transports?

Yes and no. There is one important difference. In HTTP, the transformation is exchanged at the transport protocol level (in the HTTP request line). For UDP and TCP (as implemented in Axis2) the servicePath information is not exchanged at the transport protocol level, but at the SOAP level (assuming that WS-Addressing is enabled).
  
> 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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