Hello David,
I think that an answer was provided over ticket, but I'm putting back here the answer if it can help someone else.
Here are the loggers to activate, the root level will need to be set to trace as well:
<Logger level="TRACE" name="com.semarchy.platform.repository.infrastructure.services.HttpClientRequestExecutor"/>
<Logger level="TRACE" name="org.apache.http.headers"/>
<Logger level="TRACE" name="org.apache.http.wire"/>
Thank you
David Klingelheber
How can you capture the outbound JSON message generated from a data notification? The logging documentation (https://www.semarchy.com/doc/semarchy-xdm/xdm/latest/Admin/platform-logging.html) is not very helpful in this instance.