解决There are 0 datanode(s) running and no node(s) are excluded in this operation.
参考来源:https://blog.csdn.net/weixin_41374755/article/details/107146445解释:出现本问题是在本人在hdfs上传本地文件夹过程中出现一大串错误,最后一行是这个问题,File/data/smalllog.txt.COPYINGcouldonlybereplicatedto0nodesinsteadofminReplication(=1).