原因：yarn-site.xml 中，yarn.application.classpath 未配置
解决：其中 hadoop 版本对应更改
<property>
<name>yarn.application.classpath</name>
<value>
/opt/hadoop-3.1.0/etc/hadoop,
/opt/hadoop-3.1.0/share/hadoop/common/*,
/opt/hadoop-3.1.0/share/hadoop/common/lib/*,
/opt/hadoop-3.1.0/share/hadoop/hdfs/*,
/opt/hadoop-3.1.0/share/hadoop/hdfs/lib/*,
/opt/hadoop-3.1.0/share/hadoop/mapreduce/*,
/opt/hadoop-3.1.0/share/hadoop/mapreduce/lib/*,
/opt/hadoop-3.1.0/share/hadoop/yarn/*,
/opt/hadoop-3.1.0/share/hadoop/yarn/lib/*
</value>
</property>