Tao Jie created HADOOP-15419:
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Summary: Should not obtain delegationTokens from all namenodes
when using ViewFS
Key: HADOOP-15419
URL: https://issues.apache.org/jira/browse/HADOOP-15419
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 3.0.2
Reporter: Tao Jie
Today when submit a job to a viewfs cluster, the client will try to obtain
delegation token from all namenodes under the viewfs while only one namespace
is actually used in this job. It would create many unnecessary rpc call to the
whole cluster.
In viewfs situation, we can just obtain delegation token from specific namenode
rather than all namenodes.
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