RollingFileAppender with createOnDemand=true creates directories on a path eagerly (on initialization)

The RollingFileAppender with createOnDemand=true creates directories on the path to a log file even if it never writes to the log file.

For example, if the log file is in /f/dummy.log and the folder f doesn’t exist, the folder f is not created lazily as the file dummy.log is.

I think, the expected behavior is that RollingFileAppender with createOnDemand=true setting creates directories on a path lazily at the same time as the log file is created.