问题起因:定时执行azkaban任务时报错:WARN security.UserGroupInformation: PriviledgedActionException as:hadoop (auth:SIMPLE) cause:org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot delete /user/hadoop/.staging/job_1519809873961_6227. Name node is in safe mode.
然后xshell连接服务器切hive查看原因,发现hive无法进入Exception in thread "main" java.lang.RuntimeException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /tmp/hive/hadoop/2f76618a-3efd-4dad-abe3-290b2d40a523. Name node is in safe mode.