log4j - Empty log file -

问题

I have a Java Application with this following log4j configuration properties, called log4j-DEV.properties:

################################################################
# Root logger option
###############################################################
log4j.rootLogger=ALL, file,stdout

###############################################################


###############################################################
# Logger response
###############################################################
log4j.logger.response=ALL, proxyLog
log4j.additivity.response=false 

###############################################################



#############################################################
# APPENDER
############################################################# 

# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\log\\application.log
log4j.appender.file.Threshold = ALL
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Threshold = ALL
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Direct log messages to a log file
log4j.appender.proxyLog=org.apache.log4j.RollingFileAppender
log4j.appender.proxyLog.Threshold = ALL
log4j.appender.proxyLog.File=C:\\log\\proxyLog.log
log4j.appender.proxyLog.MaxFileSize=10MB
log4j.appender.proxyLog.MaxBackupIndex=1
log4j.appender.proxyLog.layout=org.apache.log4j.PatternLayout
log4j.appender.proxyLog.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

I use Tomcat as Application Server and I launch it with parameter -Dlog4j.configuration="log4j-DEV.properties"

When application starts, the file C:\log\application.log and C:\log\proxyLog.log are created but are empty although application writes log with instruction:

Log log = LogFactory.getLog(getClass());
log.info("Test log");

What is wrong?

Thanks all

回答1:

I changed my code from:

Log log = LogFactory.getLog(getClass());
log.info("Test log");

Logger logger = null; 
logger = Logger.getRootLogger(); 
logger.info("TEST");

The log4j configuration was fine, I changed the behavior of application in order to use directly log4j classes and now the log appears correctly.

Thanks

来源：https://stackoverflow.com/questions/29882310/log4j-empty-log-file

标签

java

Tomcat

logging

log4j