JobTracker should be able to renew delegation token over HTTP
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Key: MAPREDUCE-2420
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2420
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.4
Reporter: Boris Shkolnik
Assignee: Boris Shkolnik
in case JobTracker has to talk to a NameNode running a different version (RPC
version mismatch), Jobtracker should be able to fall back to HTTP renewal.
Example of the case - running distcp between different versions using hfpt.
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