On 25 Sep 2015, at 05:25, Zhiliang Zhu <zchl.j...@yahoo.com.INVALID<mailto:zchl.j...@yahoo.com.INVALID>> wrote:
However, I just could use "hadoop fs -ls/-mkdir/-rm XXX" commands to operate at the remote machine with gateway, which means the namenode is reachable; all those commands only need to interact with it. but commands "hadoop fs -cat/-put XXX YYY" would not work with error message as below: put: File /user/zhuzl/wordcount/input/1._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 operation. 15/09/25 10:44:00 INFO hdfs.DFSClient: Exception in createBlockOutputStream org.apache.hadoop.net.ConnectTimeoutException: 60000 millis timeout while waiting for channel to be ready for connect. ch : java.nio.channels.SocketChannel[connection-pending remote=/10.6.28.96:50010] the client can't reach the datanodes
