Github user tnachen commented on the pull request:
https://github.com/apache/spark/pull/3741#issuecomment-68033611
@jongyoul just to give more context on the Mesos side, a user was chosen to
launch the executor command with by the following:
- If mesos slave flag switch_user is disabled (it's true by default), the
user that was used to launch the mesos slave is used to launch executor
- then If ExecutorInfo's commandInfo has a user specified, that user is
used instead
- otherwise if FrameworkInfo has specified a user that user is used
- otherwise it all defaults to the user that is launched Mesos slave with
@JoshRosen The patch looks good from a Mesos executor perspective, as the
launchTask is the method that actually performs the task, and if there is a
user switching mechanism it is as close as it gets to. However I'm not sure
when it is ran under the spark executor context if that user is truly
preserved. @jongyoul have you tested this running a full spark task and
verified it worked?
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