当我们使用python的hdfs包进行上传和下载文件的时候，总会出现如下问题
requests.packages.urllib3.exceptions.NewConnectionError:<requests.packages.urllib3.connection.HTTPConnection object at 0x7fe87cc37c50>: Failed to establish a new connection: [Errno -2] Name or service not known
其实这主要是由于没有将各个集群节点的ip映射到/etc/hosts文件中
修改/etc/hosts文件，将各个集群节点ip映射加上即可，如博主所示
vim /etc/hosts
192.168.20.174 hadoop04
192.168.20.173 hadoop03
192.168.20.172 hadoop02
192.168.20.171 hadoop01
正文完