put: File /input._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). Ther

Hadoop上传文件报错： operation.java.net.NoRouteToHostException: 没有到主机的路由

报错：put: File /input.COPYING could only be replicated to 0 nodes instead of minReplication (=1). There are 2 datanode(s) running and 2 node(s) are excluded in this

问题截图：

解决方法：

1.没有主机路由问题大多是防火墙的问题：
关闭所有节点的防火墙：

systemctl stop firewalld      //关闭防火墙
systemctl status firewalld      //查看防火墙状态

2,如果做完的一步还不行，还有第二个问题：
（1）先查看一下各个节点的进程

jps

原因可能是hadoop格式化的时候出现了问题，导致他的clusterId不一致

去到存放hadoop的临时文件的目录那：
（可先去查看自己存放到了哪，core-site.xml）

去到上图的那个路径，删掉这个目录

rm -fr /home/software/data

最后格式化hadoop:

 hdfs namenode -format

成功：

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put: File /input._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). Ther

Hadoop上传文件报错： operation.java.net.NoRouteToHostException: 没有到主机的路由

报错：put: File /input.COPYING could only be replicated to 0 nodes instead of minReplication (=1). There are 2 datanode(s) running and 2 node(s) are excluded in this

解决方法：

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