Log4j has been upgraded to Log4j 2 in TRA 5.11.3 and TRA 5.12.x. Because of this change, the code for logging needs to be updated in the Java Code activity.

Code that works with BW 5.14.0 and earlier versions -

org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger("bw.logger");
logger.warn("This is a warning message from the either a Java Code or Java Method activity");

Code that works with BW 5.14.1 and BW 5.15.x -

org.apache.logging.log4j.Logger logger = org.apache.logging.log4j.LogManager.getLogger("bw.logger");
logger.warn("This is a warning message from the either a Java Code or Java Method activity");

Java Code activity log4j logging fails with the error java.lang.NoClassDefFoundError : org/apache/log4j/Logger after upgrading to BW 5.14.1 or BW 5.15.x