The production server has DEBUG statements in it's log.  Where are they coming from?

Answer

The DEBUG statements may be from the dev/qa environment.  The dev/qa environment can interfere with the production environment.  Make sure the ip and port is unique for each environment to avoid this.  After making changes don't forget to re-deploy the application.

Follow up question:  What files?

You have to set this IP and port in the following two property files:
1. WEB-INF\classes\DistributedEventService-config.xml
2. WEB-INF\properties\DistributedGlobalCache-Config.xml

In each of these please set multicastGroupAddress and multicastGroupPort. Set the same IP:port in both the files but make sure that this value is different for each environment.

For eg:
For Production - 230.0.1.1:4567
For QA - 230.0.2.1:4567

Follow up question:  Do these IP addresses need to be valid or could we put in dummy values?

They dont have to be real IP.
Choose the IPs between 224.0.0.1 to 239.255.255.255. You can keep the default port (4567) same for each environment as the IP:port combination should be unique.