Github user mridulm commented on the issue:
https://github.com/apache/spark/pull/17723
@vanzin While UGI does provide credential store and implementations for
GSSAPI, it also does a bunch of other things - which are leveraged by hadoop
ipc, hadoop common, etc.
Leveraging ugi from a non hadoop env is always a potential risk - due to
evolution of ugi to support hadoop usecases, expectations of hadoop api from
ugi, and interaction between hadoop and non hadoop deployments (for example - a
non hadoop based resource manager application interacting with a hadoop based
service).
As an implementation detail, mesos could be depending on UGI - but
introducing this into core security should merit careful consideration. If
possible, we should abstract things out so that use of UGI is an implementation
detail of yarn and mesos (which, if I understand correctly, is the argument you
made for current use of UGI by @mgummelt ) - while keeping core open to other
implementations.
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