Configure the logger file, /etc/cacao/instances/default/private/logger.properties, as following depending on the cmass messages you want logged:
To select only WARNING and SEVERE messages, the first line of the file should read as follows:
com.sun.cluster.level=WARNING |
To enable all geocontrol messages, the second line of the file should read as follows:
com.sun.cluster.agent.geocontrol.level=ALL |
The enabled traces are copied to the /var/cacao/instances/default/logs/cacao.0 file.