Trying to configure a log rollover with logs being rolled daily and put into a directory named "yyyy-MM", i.e. one folder for each month containing that month's logs, I'm using the following appender config:
However, it seems as if the current logback implementation merely considers the first %d specification, which leads to a log rotation only once per month instead of the desired once per day frequency.
I figure this is because via %d, the log rotation frequency and the file name pattern are somewhat tied together and seemingly can't be specified independently.
It would be nice if either multiple %d specifiers would be supported, with an option to specify which one should be considered for the rollover period.
Even better, it might be a good idea to support the rollover period to be specified separately and independently from the file name pattern; arguably, using the file name patterns for both is somewhat convenient, but violates the principle of "separation of concerns".