If debug logging is enabled, i.e.
then this actually enables all logging - i.e. including trace.
One effect of this is that if you're using the Hazelcast plugin with debug enabled, your logs fill up pretty quickly.
This has two changes;
Enabling debug logging no longer enables trace logging
A new property, log.trace.enabled, which if set to true will enable trace logging and above. Note; as this is really only for use in special circumstances, there is no trace.log file (output instead is in all.log) and no specific UI for changing. Instead, it's necessary to change the property via the System Properties screen.