1.第一种:重启hdfs和yarn
2.第二种:修改配置
(1)关闭hdfs和yarn
stop-dfs.sh
stop-yarn.sh
(2)修改配置文件
cd /opt/module/hadoop-2.8.4/etc/hadoop
vi yarn-site.xml
添加内容:
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>20480</value>
</property>
<property>
<name>yarn.scheduler.minimum-allocation-mb</name>
<value>2048</value>
</property>
<property>
<name>yarn.nodemanager.vmem-pmem-ratio</name>
<value>2.1</value>
</property>
(3).重启
start-dfs.sh
start-yarn.sh