mkdir: Cannot create directory /file. Name node is in safe mode.

剛剛在hadoop想創建一個目錄的時候，發現報錯了

具體信息如下：

[hadoop@mini1 hadoop-2.6.4]$ hadoop fs -mkdir /file
mkdir: Cannot create directory /file. Name node is in safe mode.

從錯誤信息可以看到hadoop當前的namenode是處於安全模式。

解決：

[hadoop@mini1 hadoop-2.6.4]$ hadoop  dfsadmin -safemode leave
DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. Safe mode is OFF

再次執行創建目錄的的命令，成功