Why do I get log4j warning in java with jasper report?

Question

I am using java jasperreport in java every time i compile it says

log4j: warning no appender s could be found in logger , please initialize logger system properly.

Answer 1

It's not a problem, don't worry about it.

Jasper reports library uses log4j as a logger, the warning you are seeing is that you have not configured it, but this reflects only on logging, the library works just fine.

If you don't care about jasper-reports log, don't worry about it.

If instead you like to see the log, debug the library etc. checkout log4j's manual on how to configure it or see No appenders could be found for logger(log4j)?