Note: This was originally posted by an inactive account. Content was preserved by moving under an admin account.
Originally posted by: gmullinJust posting this as it might be useful for other users.
Jetty log level can be changed in the log4j.properties file which in my case was in: $BRAIN_HOME/jetty/work/jetty-0.0.0.0-8081-root.war-_-any-/webapp/WEB-INF/classes. This will depend on if you have the work directory or not.
There's a lot of categories for logging, I found most of the log was from audit logging, i.e. log4j.category.AuditLogging, can be set to OFF, WARN, INFO, DEBUG. Same goes for the other properties.
A restart of Jetty is required.