我使用的是mac，里面安装了hadoop 3.2.1版。由于以下错误，我无法将数据文件添加到hdfs。

at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:716)
put: File /try/hello.txt._COPYING_ could only be written to 0 of the 1 minReplication nodes. There are 0 datanode(s) running and 0 node(s) are excluded in this operation.