Cause: the container running on the slave machine tried to use too much memory and was killed by the nodemanager.

Solution: add memory

Set the memory configuration for map and reduce tasks in the configuration file mapred-site.xml of hadoop as follows: (The actual memory configured in the value needs to be modified according to the memory size of your machine and the application)

<property>
　　<name>mapreduce.map.memory.mb</name>
　　<value>1536</value>
</property>
<property>
　　<name>mapreduce.map.java.opts</name>
　　<value>-Xmx1024M</value>
</property>
<property>
　　<name>mapreduce.reduce.memory.mb</name>
　　<value>3072</value>
</property>
<property>
　　<name>mapreduce.reduce.java.opts</name>
　　<value>-Xmx2560M</value>
</property>