Re: Defer evaluation of FileAppender filename until file is opened?

Found it: need to make sure we have a key for the route, even if it won't be used. Added pattern="x" to

Re: Defer evaluation of FileAppender filename until file is opened?

That looks promising, but I am having an issue with the RoutingAppender throwing an NPE when the first event gets past the filter on the RoutingAppender: 2020-02-05 02:38:08,798 Log4j2-TF-1-AsyncLogger[AsyncContext@2cdf8d8a]-1 ERROR An exception occurred processing Appender MyRoute java.lang.Nu

Re: Defer evaluation of FileAppender filename until file is opened?

Yes, so your best bet is to use the RoutingAppender and only supply a default Route. The Appender itself will only be created when something is logged to the Route. Ralph > On Feb 4, 2020, at 6:55 PM, Doug Wegscheid wrote: > > yes, that works as designed, but does not resolve my problem. The

Re: Defer evaluation of FileAppender filename until file is opened?

yes, that works as designed, but does not resolve my problem. The filename is not evaluated when the first event is written (after we have a good date/time), it's evaluated when log4j2 is configured (which is before when we have a good date/time set). On Tuesday, February 4, 2020, 08:19:16

Re: Defer evaluation of FileAppender filename until file is opened?

The FileAppender has an option named createOnDemand. If you set it to true then the file will only be created when a log event is written to it. See http://logging.apache.org/log4j/2.x/manual/appenders.html#FileAppender . R

Defer evaluation of FileAppender filename until file is opened?

I am trying to have log4j2 write log files with names mmdd-HHMMSS.log, but not start writing the file until we have a good system time (>year 1986). I have an application running on a system that boots up, and takes a while to get the correct time; until that happens, the system thinks it