Alex Rivera | Logout

How to enable Logger.debug() in Log4j

Asked 2009-11-04T12:26:47.217
68

While trying to execute the following lines only the last two statements are displayed("Here is some ERROR" and "Here is some FATAL") and the first three statements are not displayed.I had just started to learn this topic, can anyone tell why is this happening?

    logger.debug("Here is some DEBUG");
    logger.info("Here is some INFO");
    logger.warn("Here is some WARN");
    logger.error("Here is some ERROR");
    logger.fatal("Here is some FATAL");

the log4j.property has 

log4j.rootLogger=debug,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%5p] %d{mm:ss}(%F:%M:%L)%n%m%n%n
java log4j
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1 Answer

6

This is probably happening because your log4j configuration is set to ERROR. Look for a log4j.properties file with contents like the following:

log4j.rootLogger=ERROR, CONSOLE

# console logging
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=DEBUG
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d %-5p %-20.20t %-24c{1}: %m%n

The rootLogger is set to ERROR level here using a CONSOLE appender.

Note that some appenders like the console appender also have a Threshold property that can be used to overrule the rootLoggers level. You need to check both in this case.

answered 2009-11-04T12:36:55.350

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