log4j appender and logging level is not working in my code

[Pedro Costa <pe...@gmail.com>]

Hi,

Despite reading the log4j book, I still have questions about configuring
the log4j and add an appender to my class. I've put the log4j.properties
and JobTracker.java files below.

1 - I've this log4j file, and when I change in hadoop.root.logger from INFO
to DEBUG the output of the class org.apache.hadoop.mapred.JobTracker it's
still in INFO, and I don't understand why. When I change the root logger,
doesn't mean that everything will be in DEBUG?

2 - I also added the appender MOS in the properties file, but the
class MapStatusServlet isn't printing anything. I want to associate this
class to the appender MOS. How should I do it?


log4j.properties

# Define some default values that can be overridden by system properties
hadoop.root.logger=DEBUG,console,MOS
hadoop.log.dir=.
hadoop.log.file=hadoop.log

#
# Job Summary Appender
#
# Use following logger to send summary to separate file defined by
# hadoop.mapreduce.jobsummary.log.file rolled daily:
# hadoop.mapreduce.jobsummary.logger=INFO,JSA
#
hadoop.mapreduce.jobsummary.logger=${hadoop.root.logger}
hadoop.mapreduce.jobsummary.log.file=hadoop-mapreduce.jobsummary.log

# Define the root logger to the system property "hadoop.root.logger".
log4j.rootLogger=${hadoop.root.logger}, EventCounter

# Logging Threshold
log4j.threshhold=ALL

#
# Daily Rolling File Appender
#

log4j.appender.DRFA=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DRFA.File=${hadoop.log.dir}/${hadoop.log.file}

# Rollver at midnight
log4j.appender.DRFA.DatePattern=.yyyy-MM-dd

# 30-day backup
#log4j.appender.DRFA.MaxBackupIndex=30
log4j.appender.DRFA.layout=org.apache.log4j.PatternLayout

# Pattern format: Date LogLevel LoggerName LogMessage
log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
# Debugging Pattern format
#log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2}
(%F:%M(%L)) - %m%n

# map output servlet
log4j.appender.MOS=org.apache.log4j.DailyRollingFileAppender
log4j.appender.MOS.File=${hadoop.log.dir}/${hadoop.log.file}

log4j.appender.MOS.layout=org.apache.log4j.PatternLayout
log4j.appender.MOS.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

#
# console
# Add "console" to rootlogger above if you want to use this
#

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.target=System.err
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p
%c{2}: %m%n

#
# TaskLog Appender
#

#Default values
hadoop.tasklog.taskid=null
hadoop.tasklog.iscleanup=false
hadoop.tasklog.noKeepSplits=4
hadoop.tasklog.totalLogFileSize=100
hadoop.tasklog.purgeLogSplits=true
hadoop.tasklog.logsRetainHours=12

log4j.appender.TLA=org.apache.hadoop.mapred.TaskLogAppender
log4j.appender.TLA.taskId=${hadoop.tasklog.taskid}
log4j.appender.TLA.isCleanup=${hadoop.tasklog.iscleanup}
log4j.appender.TLA.totalLogFileSize=${hadoop.tasklog.totalLogFileSize}

log4j.appender.TLA.layout=org.apache.log4j.PatternLayout
log4j.appender.TLA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n

#
#Security audit appender
#
hadoop.security.log.file=SecurityAuth.audit
log4j.appender.DRFAS=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DRFAS.File=${hadoop.log.dir}/${hadoop.security.log.file}

log4j.appender.DRFAS.layout=org.apache.log4j.PatternLayout
log4j.appender.DRFAS.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
#new logger
log4j.logger.SecurityLogger=OFF,console
log4j.logger.SecurityLogger.additivity=false

#
# Rolling File Appender
#

#log4j.appender.RFA=org.apache.log4j.RollingFileAppender
#log4j.appender.RFA.File=${hadoop.log.dir}/${hadoop.log.file}

# Logfile size and and 30-day backups
#log4j.appender.RFA.MaxFileSize=1MB
#log4j.appender.RFA.MaxBackupIndex=30

#log4j.appender.RFA.layout=org.apache.log4j.PatternLayout
#log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2} - %m%n
#log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2}
(%F:%M(%L)) - %m%n

#
# FSNamesystem Audit logging
# All audit events are logged at INFO level
#
log4j.logger.org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit=WARN

# Custom Logging levels

hadoop.metrics.log.level=INFO
#log4j.logger.org.apache.hadoop.mapred.JobTracker=DEBUG
#log4j.logger.org.apache.hadoop.mapred.JobTracker=DEBUG
#log4j.logger.org.apache.hadoop.mapred.TaskTracker=DEBUG
#log4j.logger.org.apache.hadoop.fs.FSNamesystem=DEBUG
log4j.logger.org.apache.hadoop.metrics2=${hadoop.metrics.log.level}

# Jets3t library
log4j.logger.org.jets3t.service.impl.rest.httpclient.RestS3Service=ERROR

#
# Null Appender
# Trap security logger on the hadoop client side
#
log4j.appender.NullAppender=org.apache.log4j.varia.NullAppender

#
# Event Counter Appender
# Sends counts of logging messages at different severity levels to Hadoop
Metrics.
#
log4j.appender.EventCounter=org.apache.hadoop.log.metrics.EventCounter

#
# Job Summary Appender
#
log4j.appender.JSA=org.apache.log4j.DailyRollingFileAppender
log4j.appender.JSA.File=${hadoop.log.dir}/${hadoop.mapreduce.jobsummary.log.file}
log4j.appender.JSA.layout=org.apache.log4j.PatternLayout
log4j.appender.JSA.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{2}:
%m%n
log4j.appender.JSA.DatePattern=.yyyy-MM-dd
log4j.logger.org.apache.hadoop.mapred.JobInProgress$JobSummary=${hadoop.mapreduce.jobsummary.logger}
log4j.additivity.org.apache.hadoop.mapred.JobInProgress$JobSummary=false

#EOF
------------------------------------------------------------------------


//
-----------------------------------------------------------------------------
org.apache.hadoop.mapred.JobTracker.java

package org.apache.hadoop.mapred;

public class JobTracker  {
    public static class MapStatusServlet extends HttpServlet {
        private static final long serialVersionUID = -5105398792765783446L;
        public static final Log LOG = LogFactory.getLog(JobTracker.class);

        @Override
        public void doGet(HttpServletRequest request,
                HttpServletResponse response
                ) throws ServletException, IOException {

            NDC.push("Homer Simpson");
            LOG.debug("Cookies...");
            NDC.pop();
  }

// EOF
-------------------------------------------------------------------------


Thanks,