How to Re-Execute Log4j “Default Initialization Procedure”?

Question

At runtime I often create/modify log4j Loggers, Appenders, Levels, Layouts, and time to time need to reset everything back to defaults.

Log4j

Answer 1

According to the documentation for the doConfigure method:

Read configuration from a file. The existing configuration is not cleared nor reset. If you require a different behavior, then call resetConfiguration method before calling doConfigure.

So I belive that calling LogManager.resetConfiguration() and recall PropertyConfigurator.configure() with the same files as on startup will do what you want.

The resetConfiguration() method is documented in Hierarchy class.