错误描述

向 HDFS 上传文件时，提示下面错误：

Resources are low on NN. Please add or free up more resources then turn off safe mode manually. NOTE:  If you turn off safe mode before adding resources, the NN will immediately return to safe mode. Use "hdfs dfsadmin -safemode leave" to turn safe mode off.

解决

可能是磁盘快占满了，执行下面命令查看：

查看磁盘占用大小：

df -hl

du -sh /