Hadoop problem running pi stuck solutions

https://www.jianshu.com/p/5dbb9011d2ee

I use a Mac computer. At the beginning did not know why stuck.

I formatted several times namenode did not solve my problem, inspired from the link above. Modify yarn health check

<property>
  <name>yarn.nodemanager.disk-health-checker.min-healthy-disks</name>
  <value>0.0</value>
   </property>
   <property>
    <name>yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage</name>
     <value>100.0</value>
  </property>

The successful resolution of the problem