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log4j:ERROR A "org.apache.log4j...." object is not assignable to a "org.apache.log4j...." variable. log4j:ERROR The class "org.apache.log4j...." was loaded by log4j:ERROR [WebappClassLoader]
like errors, in our case, the solution was to add the parameter
to JAVA_OPTS in joget-start.bat.
It's just a workaround, though. The Somehow, the proper way would be using to use log4j as an osgi service somehow.