BUG(mapduce):Container killed on request. Exit code is 143

问题：在mapreduce过程中出现以下问题，使得最后出不来结果

Container killed on request. Exit code is 143

[2021-11-10 10:46:48.478]Container [pid=4040,containerID=container_1636510983211_0003_01_000003] is running 229304832B beyond the 'VIRTUAL' memory limit. Current usage: 57.3 MB of 1 GB physical memory used; 2.3 GB of 2.1 GB virtual memory used. Killing container

原因：这是由于YARN虚拟内存率不足导致的。

方法一：增大虚拟内存率

在yarn-site.xml文件中添加以下配置

<property>

       <name>yarn.nodemanager.vmem-pmem-ratio</name>

       <value>3.0</value>

</property>

方法二：同样在yarn-site.xml增加以下配置：关掉对container执行虚拟内存限制

 <property>
       <name>yarn.nodemanager.vmem-check-enabled</name>
       <value>false</value>
  </property>