Hadoop Jobhistory记录下已运行完的MapReduce作业信息并存放在指定的HDFS目录下，
默认情况下是没有启动的，需要配置完后手工启动服务。

1.修改hadoop的配置文件mapred-site.xml如下

<property>
  <name>mapreduce.jobhistory.address</name>
  <value>zdh-9:10020</value>
  <description>MapReduce JobHistory Server IPC host:port</description>
</property>

<property>
  <name>mapreduce.jobhistory.webapp.address</name>
  <value>zdh-9:19888</value>
  <description>MapReduce JobHistory Server Web UI host:port</description>
</property>

<property>
    <name>mapreduce.jobhistory.done-dir</name>
    <value>/history/done</value>
</property>

<property>
    <name>mapreduce.jobhistory.intermediate-done-dir</name>
    <value>/history/done_intermediate</value>
</property>

2.启动history-server

mr-jobhistory-daemon.sh start historyserver
停止history-server
mr-jobhistory-daemon.sh stop historyserver

3.通过浏览器访问Hadoop Jobhistory的WEBUI

http://zdh-9:19888

4.参考文章

Hadoop JobHistory
http://www.cnblogs.com/luogankun/p/4019303.html