Building cluster again after the namenode found in addition to the three basic view on process may also have other process, such as originally appeared in the process of child nodes appear on the master node, the namenode is normally have three processes: the namenode, resourcemanager, secondarynamenode, child nodes are two processes: nodemanager, datanode, but there might be originally appeared in the process of child nodes appear on the master node, the following


(please ignore 3123)

I'm also a little meng at first, then wanted to think, found that the forehead,,

is my original set of pseudo distributed cluster forget stop - after all, so the process has been open,
Solution: the kill number + process, thus the