Upstream equivalent of https://bugzilla.redhat.com/show_bug.cgi?id=1570083 :

It looks like in the recent odlparent bump and Karaf upgrade we went to a very small karaf.log file size, which with our default of logging at INFO level is typically too small and leads to much rotation in real world usage.

Let's bump this from 16 MB to 10 GB:

log4j2.appender.rolling.policies.size.size = 16MB