java - 如何覆盖特定类的log4j设置

Question

对于Hadoop HBASE集群，我想覆盖log4j以将特定类org.apache.hadoop.hbase.tool.Canary的日志输出到控制台。

当前，Hbase应用程序文件的log4j.properties如下所示:

hbase.root.logger=INFO,RFA,RFAE
hbase.log.dir=.
hbase.log.file=hbase.log

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

# Logging Threshold
log4j.threshold=ALL

# Rolling File Appender properties
hbase.log.maxfilesize=128MB
hbase.log.maxbackupindex=10
hbase.log.layout=org.apache.log4j.PatternLayout
hbase.log.pattern=%d{ISO8601} %p %c: %m%n

#
# Daily Rolling File Appender
# Hacked to be the Rolling File Appender
# Rolling File Appender
log4j.appender.DRFA=org.apache.log4j.RollingFileAppender
log4j.appender.DRFA.File=${hbase.log.dir}/${hbase.log.file}

log4j.appender.DRFA.MaxFileSize=${hbase.log.maxfilesize}
log4j.appender.DRFA.MaxBackupIndex=${hbase.log.maxbackupindex}

log4j.appender.DRFA.layout=${hbase.log.layout}
log4j.appender.DRFA.layout.ConversionPattern=${hbase.log.pattern}
log4j.appender.DRFA.Append=true

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

log4j.appender.RFA.MaxFileSize=${hbase.log.maxfilesize}
log4j.appender.RFA.MaxBackupIndex=${hbase.log.maxbackupindex}

log4j.appender.RFA.layout=${hbase.log.layout}
log4j.appender.RFA.layout.ConversionPattern=${hbase.log.pattern}
log4j.appender.RFA.Append=true

#
# 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

#
# Error log appender, each log event will include hostname
#
hbase.error.log.file=hbase_error.log
log4j.appender.RFAE=org.apache.log4j.RollingFileAppender
log4j.appender.RFAE.File=${hbase.log.dir}/${hbase.error.log.file}
log4j.appender.RFAE.MaxFileSize=${hbase.log.maxfilesize}
log4j.appender.RFAE.MaxBackupIndex=${hbase.log.maxbackupindex}

log4j.appender.RFAE.layout=org.apache.log4j.PatternLayout
log4j.appender.RFAE.layout.ConversionPattern=%d{ISO8601} data-analytics1-data-namenode-dev-001 %p %c: %m%n

log4j.appender.RFAE.Threshold=ERROR
log4j.appender.RFAE.Append=true

# Custom Logging levels
org.apache.hadoop.hbase.regionserver.compactions.CompactionProgress=DEBUG
log4j.logger.org.apache.zookeeper=WARN
#log4j.logger.org.apache.hadoop.fs.FSNamesystem=DEBUG
log4j.logger.org.apache.hadoop.hbase=INFO
# Make these two classes INFO-level. Make them DEBUG to see more zk debug.
log4j.logger.org.apache.hadoop.hbase.zookeeper.ZKUtil=WARN
log4j.logger.org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher=WARN
# Snapshot Debugging
log4j.logger.org.apache.hadoop.hbase.regionserver.snapshot=DEBUG
#log4j.logger.org.apache.hadoop.dfs=DEBUG
# Set this class to log INFO only otherwise its OTT

# Uncomment this line to enable tracing on _every_ RPC call (this can be a lot of output)
#log4j.logger.org.apache.hadoop.ipc.HBaseServer.trace=DEBUG

# Uncomment the below 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

请指教。
谢谢!

Answer 1

将以下行添加到log4j.properties:

log4j.logger.org.apache.hadoop.hbase.tool.Canary=INFO, console

您可以将INFO更改为此类所需的任何日志记录级别。

如果还希望防止该类使用其他附加程序，请通过添加以下行来更改其可加性:

log4j.additivity.org.apache.hadoop.hbase.tool.Canary = false