IDEA远程提交hadoop任务时出现的错误

Cannot delete /tmp/hadoop-yarn/staging/hadoop/.staging/job_1477796535608_0001. Name node is in safe mode.

2017-12-05 18:32:27,979 INFO  [main] mapred.ClientServiceDelegate (ClientServiceDelegate.java:getProxy(276)) - Application state is completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server
Retrying connect to server: 192.168.146.130/192.168.146.130:10020. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
Exception in thread "main" java.io.IOException: java.net.ConnectException: Call From MSI/118.202.43.35 to 192.168.146.130:10020 failed on connection exception: java.net.ConnectException: Connection refused: no further information; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

Exception in thread "main" java.io.IOException: Job status not available

<property> 
  <name>yarn.app.mapreduce.am.staging-dir</name> 
  <value>/tmp/hadoop-yarn/staging</value>
</property> 
<property> 
  <name>mapreduce.jobhistory.intermediate-done-dir</name> 
  <value>${yarn.app.mapreduce.am.staging-dir}/history/done_intermediate</value> 
</property> 
<property> 
  <name>mapreduce.jobhistory.done-dir</name> 
  <value>${yarn.app.mapreduce.am.staging-dir}/history/done</value> 
</property>

WebUI无权访问hdfs文件夹/tmp
Permission denied: user=dr.who, access=READ_EXECUTE, inode="/tmp":hadoop:supergroup:drwx------