Accepted answer

you need to properly configure the binding for slf4j. slf4j is just a facade, not a logging tool.

since 1.6.0 if no binding is found on the class path, then slf4j will default to a no-operation implementation.

have a look at the officiel manual here on how to configure slf4j.


  1. you need to add a logging library to your project that implements the slf (just as burkhard mentioned)

  2. you need to configure the logger of your choice to log debug messages to the console (e.g. with a console appender in log4j)

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