[jira] [Created] (KNOX-520) WEBHDFS with knox doesn't support NAT for OPEN operation

["LINTE (JIRA)" <ji...@apache.org>]

LINTE created KNOX-520:
--------------------------

             Summary: WEBHDFS with knox doesn't support NAT for OPEN operation
                 Key: KNOX-520
                 URL: https://issues.apache.org/jira/browse/KNOX-520
             Project: Apache Knox
          Issue Type: Bug
          Components: Server
    Affects Versions: 0.5.0
         Environment: Centos 6
Hadoop 2.6

            Reporter: LINTE


Network topology : 

                          /==> knox1 ==\            
Load balancer =                         ==>   Namenodes
                          \==> knox2 ==/      

A VIP (dns : knox-server) is supported by the load balancer, listening on 443 TCP port (HTTPS).
knox1 and knox2 listen on 8443 TCP port (HTTPS).
So the traffic is NATED from knox-server:443 to knox1:8443 or knox2:8443.

When doing an open operation on a file with webhdfs API throught knox it fails beacuse of a bad redirection 307.

First request from the client (authenticated)
   ==> https://knox-server/gateway/sandbox/webhdfs/v1/tmp/myfile?OP=OPEN

Response for this request by knox : 
   ==> Location: https://knox-server:8443/gateway/sandbox/webhdfs/v1/tmp/myfile?_=<my_access_token>

So the Knox gateway response contains a redirection to the good dns (knox-server) but to the unNATed port (8443) it should be 443.

Redirection should be like the first request : 
   ==>  Location : https://knox-server/gateway/sandbox/webhdfs/v1/tmp/myfile?_=<my_access_token>







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