Hadoop集群最好是HA高可用集群

打开yarn-site.xml文件

修改/添加配置项 

<property>

   <name>yarn.resourcemanager.recovery.enabled</name>

   <value>true</value>

</property>

<property>

   <name>yarn.resourcemanager.store.class</name>

   <value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore</value>

</property>

<property>

   <name>yarn.resourcemanager.zk-address</name>

   <value>worker-1:2181,worker-2:2181</value>

</property>

<property>

   <name>yarn.nodemanager.recovery.enabled</name>

   <value>true</value>

</property>

<property>

   <name>yarn.nodemanager.recovery.dir</name>

   <value>${hadoop.tmp.dir}/yarn-nm-recovery</value>

</property>

<property>

   <name>yarn.nodemanager.address</name>

   <value>${yarn.nodemanager.hostname}:8041</value>

</property>