log4j直接输出日志到flume-白红宇

log4j.properties配置：

log4j.rootLogger=INFO

log4j.category.com.besttone=INFO,flume

log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender

log4j.appender.flume.Hostname = localhost

log4j.appender.flume.Port = 44444

log4j.appender.flume.UnsafeMode = true

需要将/opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/flume-ng/tools/flume-ng-log4jappender-1.4.0-cdh5.0.0-jar-with-dependencies.jar添加到classpath下。

然后可以写一个简单的测试类来测试一下：

[java]

package com.besttone.flume;

import java.util.Date;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

public class WriteLog {

protected static final Log logger = LogFactory.getLog(WriteLog.class);

* @param args

* @throws InterruptedException

public static void main(String[] args) throws InterruptedException {

// TODO Auto-generated method stub

while (true) {

//每隔两秒log输出一下当前系统时间戳

logger.info(new Date().getTime());

Thread.sleep(2000);

}

}

}

然后写一个run.sh脚本运行这个类：

[plain]

#!/bin/bash

jarlist=`ls ./lib/*.jar`

CLASSPATH='./bin/'

for jar in ${jarlist}

CLASSPATH=${CLASSPATH}:${jar}

done

echo ${CLASSPATH}

java -classpath "$CLASSPATH" com.besttone.flume.WriteLog &

执行run.sh，将sink设置为logger,去flume的日志文件里去看，可以看到log4j的日志输出已经传输到了flume中：

2014-07-16 14:23:54,193 INFO org.apache.flume.sink.LoggerSink: Event: { headers:{flume.client.log4j.log.level=20000, flume.client.log4j.message.encoding=UTF8, flume.client.log4j.logger.name=com.besttone.flume.WriteLog, flume.client.log4j.timestamp=1405491834189} body: 31 34 30 35 34 39 31 38 33 34 31 38 39 1405491834189 }