Solution 4 Error (HDP)

• Note: just try to use the solution(s) addressed below to solve the corresponding error

1. 2015.07.31
   1. no response from namenode UI / 50070 is binded to private IP
      1. ambari web -> HDFS -> configs -> custom core-site -> add property
         1. key: dfs.namenode.http-bind-host
         2. value: 0.0.0.0
      2. save it and restart related services
      3. note that there are 'dfs.namenode.rpc-bind-host', 'dfs.namenode.servicerpc-bind-host' and 'dfs.namenode.https-bind-host' properties which can solve similar issue
2. 2015.07.30
   1. root is not allowed to impersonate <username>
      1. ambari web -> HDFS -> configs -> custom core-site -> add property
         1. key: hadoop.proxyuser.root.groups
         2. value: *
         3. key: hadoop.proxyuser.root.hosts
         4. value: *
      2. save it and restart related services
      3. note that you should change root to the user name who runs/submits the service/job