Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/2320#issuecomment-54873202
yes as @pwendell mentions in pr #265 if you are going to store anything in
a file, you have to make sure its a secure location and if its transferred
people might want the option for that connection to be secure.
Also we don't want this running when running in yarn mode so we need a way
to only do it for other modes.
The jira doesn't have much details. Can you explain the end goal? Are you
wanting to support multiple users all using different credentials? can you give
more details on the entire setup.
If something like this does go in we definitely need to document how people
configure it.
Who do you have the spark daemons running as and how are they having
permissions to read the users keytab? That in itself could be a huge security
hole. If one user can use the keytab of another.
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