Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/16788#discussion_r105526180
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -1006,7 +1006,7 @@ class DAGScheduler(
runningStages -= stage
return
}
-
+ val tokens = KerberosUtil.getHadoopDelegationTokens
--- End diff --
See my comment about below about how current spark (on yarn) handles
security https://github.com/apache/spark/pull/16788/files#r105319503.
@tgravescs or @vanzin can correct me if I am wrong (in case I am
misremembering) -
In a secure hdfs, it is not necessary for principal/keytab to be provided -
if the job will finishes before token renewal is necessitated.
Given above : The call chain in KerberosUtil.getHadoopDelegationTokens will
throw an exception if they are missing if ugi security is enabled.
I am not sure if this is a requirement in mesos, but it is not for yarn.
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