八、配置历史服务器
为了查看程序的历史运行情况，需要配置一下历史服务器。具体配置步骤如下：
1.
配置mapred-site.xml
[delopy@hadoop102 /opt/module/hadoop/etc/hadoop]$ vim mapred-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://www.likecs.com/configuration.xsl"?>
<!--
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. See accompanying LICENSE file.
-->
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
<description>指定MapReduce程序运行在Yarn上</description>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>hadoop102:10020</value>
<description>历史服务器端地址</description>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>hadoop102:19888</value>
<description>历史服务器web端地址</description>
</property>
</configuration>
2.
分发配置
[delopy@hadoop102 /opt/module/hadoop/etc/hadoop]$ xsync /opt/module/
3.
启动历史服务器
#1.hadoop102启动历史服务器
[delopy@hadoop102 ~]$ mapred --daemon start historyserver
#2.查看历史服务器是否启动
[delopy@hadoop102 ~]$ jps
18800 NameNode
20133 Jps
18905 DataNode
19229 NodeManager
20077 JobHistoryServer
4.查看JobHistory
#1.浏览器输入：:19888/jobhistory
