Log4j配置文件例子：
# Define somedefault values that can be overridden by system properties
hbase.root.logger=INFO,console
hbase.security.logger=INFO,console
hbase.log.dir=.
hbase.log.file=hbase.log
# Define the rootlogger to the system property "hbase.root.logger".
log4j.rootLogger=${hbase.root.logger}
# Logging Threshold
log4j.threshold=ALL
#
# Daily RollingFile Appender
#
log4j.appender.DRFA=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DRFA.File=${hbase.log.dir}/${hbase.log.file}
# Rollver atmidnight
log4j.appender.DRFA.DatePattern=.yyyy-MM-dd
# 30-day backup
#log4j.appender.DRFA.MaxBackupIndex=30
log4j.appender.DRFA.layout=org.apache.log4j.PatternLayout
# Pattern format:Date LogLevel LoggerName LogMessage
log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601}%p %c: %m%n
# Debugging Patternformat
#log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601}%-5p %c{2} (%F:%M(%L)) - %m%n
#
# Security auditappender
#
hbase.security.log.file=SecurityAuth.audit
log4j.appender.DRFAS=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DRFAS.File=${hbase.log.dir}/${hbase.security.log.file}
log4j.appender.DRFAS.layout=org.apache.log4j.PatternLayout
log4j.appender.DRFAS.layout.ConversionPattern=%d{ISO8601}%p %c: %m%n
log4j.category.SecurityLogger=${hbase.security.logger}
log4j.additivity.SecurityLogger=false
#log4j.logger.SecurityLogger.org.apache.hadoop.hbase.security.access.AccessController=TRACE
#
# Null Appender
#
log4j.appender.NullAppender=org.apache.log4j.varia.NullAppender
#
# 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/ddHH:mm:ss} %p %c{2}: %m%n
# Custom Logginglevels
log4j.logger.org.apache.zookeeper=INFO
#log4j.logger.org.apache.hadoop.fs.FSNamesystem=DEBUG
log4j.logger.org.apache.hadoop.hbase=DEBUG
# Make these twoclasses INFO-level. Make them DEBUG to see more zk debug.
log4j.logger.org.apache.hadoop.hbase.zookeeper.ZKUtil=INFO
log4j.logger.org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher=INFO
#log4j.logger.org.apache.hadoop.dfs=DEBUG
# Set this class tolog INFO only otherwise its OTT
# Uncomment thisline to enable tracing on _every_ RPC call (this can be a lot of output)
#log4j.logger.org.apache.hadoop.ipc.HBaseServer.trace=DEBUG
# Uncomment thebelow if you want to remove logging of client region caching'
# and scan of.META. messages
#log4j.logger.org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation=INFO
#log4j.logger.org.apache.hadoop.hbase.client.MetaScanner=INFO