Akira Ajisaka created HADOOP-16454:
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             Summary: Share delegation tokens between multiple HttpFS servers
                 Key: HADOOP-16454
                 URL: https://issues.apache.org/jira/browse/HADOOP-16454
             Project: Hadoop Common
          Issue Type: New Feature
          Components: httpfs
         Environment: Kerberized, clients connect to multiple HttpFS servers 
via load balancer
            Reporter: Akira Ajisaka


In our environment, multiple HttpFS servers are deployed for the clients 
outside the HDFS cluster.  As we are using external load balancer service for 
the HttpFS servers, the following situation may happen:

1. A client authenticates with a HttpFS server and gets a delegation token. 
Using the delegation token, the client can access to the NameNode.
2. In the next session, the client authenticates with another HttpFS server 
(via load balancer) using the same delegation token. The client fails to access 
because the other HttpFS server does not have the information of the delegation 
token.

It would be nice to have a feature like HADOOP-14445 in HttpFS to fix the 
situation.



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