I am trying to copy files from CDH5.16 to CDH6 using the following command                  hadoop distcp webhdfs://10.0.0.154:50070/cc/cc_apiused.csv webhdfs://10.0.2.131/cc/   and I am getting the following error:                   ERROR tools.DistCp: Invalid arguments: java.net.ConnectException: ip-10-0-2-131.us-west-2.compute.internal:9870: Connection refused (Connection refused)   From Cloudera Manager UI Cluster is healthy. Attached image CDHHea.th.jpg for your reference.   I have 7 EC2 instances on AWS   Cloudera Manager and a databaes on one server -- CMserver 10.0.0.238   from the Cloudera Manager I build the cluster using 6 EC2 instances  NameNode   - 1 instance 10.0.2.131 Secondary Name  - 1 instance  10.0.2.46 DataNodes - 4 instances 10.0.2.[27,81,23,200]   CDH roles are as follows   ip-10-0-2-131.us-west-2.compute.internal 1  B  NN  G  HMS  HS2  AP  ES  HM  RM  SM  G  JHS  RM  S ip-10-0-2-27.us-west-2.compute.internal 1  DN  G  OS  G  NM ip-10-0-2-46.us-west-2.compute.internal 1  SNN  G  HS2  G  HS  S ip-10-0-2-81.us-west-2.compute.internal 1  DN  G  G  NM  S ip-10-0-2-[23, 200].us-west-2.compute.internal 2  DN  G  G  NM     Any help to resolve this issue is helpful.   Thanks, --Sriram ... View more