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
