No appenders could be found for logger(log4j)?

Question

I have put log4j to my buildpath, but I get the following message when I run my application:

log4j:WARN No appenders could be found for logger (dao.hsqlmanag         


        

Answer 1

I faced the same problem when I use log4j2. My problem is caused by using wrong dependent library:

        org.slf4j
        slf4j-log4j12
        runtime
    

Instead, I should use:

        org.apache.logging.log4j
        log4j-slf4j-impl
        runtime
    

In my case, I have a log4j2.xml defined in my "resources" directory, and specified to use it by:

System.setProperty("log4j.configurationFile", "log4j2.xml");