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Communication with Apache SENTRY is enabled by SENTRY's thrift service. When admin grants/ evokes revokes certain privileges through the Hue UI, it will be propagated to the SENTRY system and take effects on the further request coming from CDAP. In design one Hue will talk to the Sentry directly while design two take advantage of the Sentry Client apis built in CDAP to do so. We currently preferred the second one since it involves less code modification in Hue and it favors future change of security functionalities (as we have to change both in Hue and in CDAP for the first design in this case).

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