2017-03-31 01:56:05,272 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2017-03-31 01:56:05,273 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 50020: starting
2017-03-31 01:56:05,591 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop.master/192.168.62.130:9000
2017-03-31 01:56:10,595 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop.master/192.168.62.130:9000
2017-03-31 01:56:15,599 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop.master/192.168.62.130:9000
2017-03-31 01:56:20,603 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop.master/192.168.62.130:9000
2017-03-31 01:56:25,607 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop.master/192.168.62.130:9000