There are properties in the AMConfig.properties file that affect logging output:
This property will enable or disable logging. The default is ACTIVE.
service is the service's normal debug file name. level is one of the java.util.logging.Level values and denotes the level of detail recorded in the logs. The levels are SEVERE, WARNING, INFO, CONFIG, FINE, FINER, and FINEST. Most services do not record log levels with higher detail than INFO.