Jing Zhao created HDFS-7092:
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Summary: Document the logic about Delegation Token is generated
and used in both HA and non-HA setup
Key: HDFS-7092
URL: https://issues.apache.org/jira/browse/HDFS-7092
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Jing Zhao
Currently DT's generation and usage have complicated logic in HA and non-HA
setup. This includes the DT's duplication logic in HA setup, its kind and
address setup, its selection logic, etc.
In the meanwhile, users can utilize the RESTful API to get DT and use DT in
non-hadoop clients. It is hard to write correct code if the logic is not well
understood. Thus we should provide better documentation describing the DT
logic.
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