hadoop 添加自定义日志

在要加日志的类中添加语句:private static Log heartbeatLogger = LogFactory.getLog("heartbeatLogger");

在conf下面的log4j.properties中添加:

# heartbeat
log4j.logger.heartbeatLogger=INFO,HEARTBEAT
log4j.appender.HEARTBEAT=org.apache.log4j.FileAppender
log4j.appender.HEARTBEAT.File=${hadoop.log.dir}/HEARTBEAT/heart.log
log4j.appender.HEARTBEAT.layout=org.apache.log4j.PatternLayout
log4j.appender.HEARTBEAT.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.additivity.heartbeatLogger=false

即可