master错误：
n
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /data/hadoop-root-namenode-master.log._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.org.apache.hadoop.ipc.RemoteExcept
