WCF XmlWriterTraceListener does not log message - wcf

Question

I've got an IIS application that host SOAP endpoints that I am trying to add logging to for debugging purposes. The calls are executed and processed, but the message contents are in question. I need to verify the contents before any processing is done.
I've located the web.config file and added logging as follows
<system.serviceModel>
<diagnostics performanceCounters="ServiceOnly">
<messageLogging
logEntireMessage="true"
logMalformedMessages="true"
logMessagesAtServiceLevel="true"
logMessagesAtTransportLevel="false"
maxMessagesToLog="300000"
maxSizeOfMessageToLog="65535000"/>
</diagnostics>
</system.serviceModel>
And
<system.diagnostics>
<sources>
<source name="System.ServiceModel.MessageLogging" switchValue="Verbose">
<listeners>
<add name="MyCustomLogging"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData="C:\Temp\MyCustomLogging.svclog" />
</listeners>
</source>
</sources>
</system.diagnostics>
The logging works fine when I test it with smaller messages (< 2 KB) - screenshot from Service Trace Viewer
But when the real integration is triggered, the messages sent across are much lager, around 250KB each. And those are not logged. I just get an empty MessageLogTraceRecord element in my trace - screenshot from Service Trace Viewer
The size might not be the real problem, but that is the only thing I can think of. The real messages are sent by a third party and I don't have access to their system, nor do I know what they are using to send the messages. But the messages are successfully received by our application and processed, so they do make it over.
Any pointers/thoughts would be appreciated!

Answer 1

Found the answer.
I needed to add
<endToEndTracing propagateActivity="true" activityTracing="true" messageFlowTracing="true" />
in the diagnostics tag, underneath the messageLogging tag, like this
<diagnostics performanceCounters="ServiceOnly">
<messageLogging
logEntireMessage="true"
logMalformedMessages="true"
logMessagesAtServiceLevel="true"
logMessagesAtTransportLevel="true"
maxMessagesToLog="300000"
maxSizeOfMessageToLog="65535000"/>
<endToEndTracing propagateActivity="true" activityTracing="true" messageFlowTracing="true" />
</diagnostics>