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1.修改mapred-site.xml文件,没有创建
[hadoop@hadoop001 hadoop]$ pwd
/opt/software/hadoop-2.8.1/etc/hadoop
[hadoop@hadoop001 hadoop]$ cp mapred-site.xml.template mapred-site.xml

[hadoop@hadoop001 hadoop]$ vim mapred-site.xml   -- 添加<property>

1. <configuration>
   

2.         <property>
   

3.            <name>mapreduce.framework.name</name>
   

4.            <value>yarn</value>
   

5.         </property>
   

6. </configuration>

2.修改etc/hadoop/yarn-site.xml

1. <configuration>
   

2.         <property>
   

3.           <name>yarn.nodemanager.aux-services</name>
   

4.           <value>mapreduce_shuffle</value>
   

5.         </property>
   

6. </configuration>

3.Start Stop ResourceManager daemon and NodeManager daemon

[hadoop@hadoop001 sbin]$ ./start-yarn.sh
[hadoop@hadoop001 sbin]$ ./stop-yarn.sh


4.初次启动项目yarn启动失败,查看启动该日志
[hadoop@hadoop001 sbin]$ jps
18704 Jps
13767 SecondaryNameNode
13595 DataNode
13454 NameNode
[hadoop@hadoop001 sbin]$ cat /opt/software/hadoop-2.8.1/logs/yarn-hadoop-resourcemanager-hadoop001.out
[Fatal Error] mapred-site.xml:24:1: The end-tag for element type "property" must end with a '>' delimiter.

检查发现发现mapred-site.xml里>缺少 > 结束箭头 


5.再次启动yarn 启动成功
[hadoop@hadoop001 sbin]$ ./start-yarn.sh
starting yarn daemons
starting resourcemanager, logging to /opt/software/hadoop-2.8.1/logs/yarn-hadoop-resourcemanager-hadoop001.out
192.168.0.129: starting nodemanager, logging to /opt/software/hadoop-2.8.1/logs/yarn-hadoop-nodemanager-hadoop001.out
[hadoop@hadoop001 sbin]$ jps
18883 NodeManager        
18918 Jps
13767 SecondaryNameNode
18776 ResourceManager
13595 DataNode
13454 NameNode

6.启动控制台启动端口8088

• ResourceManager - http://localhost:8088/   
  

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