Exercise 1: Name node in safe mode Error

[#1]

Hi experts,

Im having a problem with exercise 1. When i run this sentence:

sqoop import-all-tables \
-m 1 \
--connect jdbc:mysql://quickstart.cloudera:3306/retail_db \
--username=retail_dba \
--password=cloudera \
--compression-codec=snappy \
--as-parquetfile \
--warehouse-dir=/user/hive/warehouse \
--hive-import

i'm having this error: 

ERROR tool.ImportAllTablesTool: Encountered IOException running import job: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /user/root/.staging. Name node is in safe mode.

Any suggestions?? How do i change the Name Node mode?

Thanks to all

[#2 · Accepted solution]

Apparently is solved with this

sudo -u hdfs hdfs dfsadmin -safemode leave