Hi Rick, I gave a longer answer about this a couple of months ago on StackOverflow:
https://stackoverflow.com/q/71862896/11748454 Basically the delayed lookup `$${date:...}` uses the current time, when the rollover occurs, while the pattern `%d{...}` uses the date of the previous rollover. A `RollingFileAppender` also uses the first (and hopefully only) pattern it finds to determine the rollover frequency. Piotr On Fri, 2 Sept 2022 at 06:21, Rick <rickq...@gmail.com> wrote: > > Hi, > > I am new to Log4j2, and I am a little bit confused with the Date lookup > $${date:yyyy-MM} and the Format Specifier %d{yyyy-MM}. > Please see the following configuration: > > <RollingRandomAccessFile name="log2file" fileName="logs/app.log" > filePattern="logs/*$${date:yyyy-MM}*/app-*%d{MM-dd-yyyy}*-%i.log.gz"> > > > -- > > Sincerely, > > *Rick Qin* > Email: rickq...@gmail.com --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
