[log4j][LOG4J2-2423] Rolling and Retention

[Carter Kozak <ck...@apache.org>]

This morning I realized that my understanding of how our rolling
appenders handle retention was flawed. When the file pattern includes
a date, the limit is applied per day (or the smallest interval present
in the date), not total rolled files over time.

Is this behavior expected? Is there a better way to cap overall
retention for a given file appender?

I've filed a ticket with a bit more data:
https://issues.apache.org/jira/browse/LOG4J2-2423

Thanks,
-ck