Troubleshooting for built-in modules

This article present possible problems and their solution for built-in modules.

UA application

I tried to use two User Applications, but it does not work

If you have the following exception:

      BindException in new DatagramSocket ...

You may have specified your User applications in the applications configuration file with:

      <application name="UA" >
         <module name="UA1" >
            <moduleProperty key="uaImpl"           value="lib/build/UA.jar" />
            <moduleProperty key="uaPath"           value="ua.myUA1" />
            <moduleProperty key="a661Config"       value="a661_properties.xml" />
            <moduleProperty key="includeServer"    value="false" />
         </module>
         <module name="UA12" >
            <moduleProperty key="uaImpl"           value="lib/build/UA.jar" />
            <moduleProperty key="uaPath"           value="ua.myUA2" />
            <moduleProperty key="a661Config"       value="a661_properties.xml" />
            <moduleProperty key="includeServer"    value="false" />
         </module>
      </application>

This will not work properly because you will try to connect twice to the server with the same inbound and outbound connection. You should rather use the uaConfig property. For example:

      <properties>
         <application name="uaappli" >
            <module name="uaappli" >
               <moduleProperty key="uaConfig"       value="uaConfig.xml"  />
               <moduleProperty key="a661Config"     value="a661_properties.xml" />
               <moduleProperty key="includeServer"  value="false" />
            </module>
         </application>
      </properties>

And for the uaConfig.xml file:

      <uas>
         <ua url="UATutorial.jar" path="org.da.protoframework.uaappli.UA1" defaultSubscribeService="published">
            <layers>
               <layer appliID="1" layerID="1" />
            </layers>
            <subscribe service="published" >
               <entryPoint method="subscribe" />
            </subscribe>
         </ua>
         <ua url="UATutorial.jar" path="org.da.protoframework.uaappli.UA2">
            <layers>
               <layer appliID="1" layerID="2" />
            </layers>
         </ua>
      </uas>

ExternalComm

Some of the buffers received from the network do not have the correct content

In the general case, you don't need to do anything specific about the queue management. If you receive a lot of buffers from the network at a rapid pace, you may see several services with the wrong values because they will be updated by the module before they could be sent.

In that case, you will need to configure the module properties to be sure that:

• You don't miss any buffer coming from the network
• You keep the content of the services even if you have a lot of buffers for the same service in a short time