Locate in the
libs\log4j.properties file the section:
#Output only INFO logs to console
log4j.appender.systemOut=org.apache.log4j.ConsoleAppender
log4j.appender.systemOut.Threshold=INFO
log4j.appender.systemOut.layout=org.apache.log4j.PatternLayout
log4j.appender.systemOut.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p %c{1} - %m%n
And then just change INFO to ERROR - this will make the logger to log to the console only errors, if any. For reference see:
https://logging.apache.org/log4j/1.2/manual.html