You can set the environment variable APPDYNAMICS_CONTROLLER_HOST_NAME in the Environment variables of the machine (or process) like any other environment variable. This will override the JSON values that are set. Linux export APPDYNAMICS_CONTROLLER_HOST_NAME=yourcontroller Windows setx APPDYNAMICS_CONTROLLER_HOST_NAME=yourcontroller Note: setx is part of Windows 2008 and higher and will take effect in new sessions / command prompts. It is persistant unlike the set command. ... View more

Check the controller-info.xml and make sure the controller, port, and account access key are set to the correct values. Perhaps share the exact log message as well. ... View more