Github user mgummelt commented on a diff in the pull request:
https://github.com/apache/spark/pull/17665#discussion_r112506508
--- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala ---
@@ -564,12 +566,22 @@ object SparkSubmit extends CommandLineUtils {
// properties and then loaded by SparkConf
sysProps.put("spark.yarn.keytab", args.keytab)
sysProps.put("spark.yarn.principal", args.principal)
-
- UserGroupInformation.loginUserFromKeytab(args.principal,
args.keytab)
}
}
}
+
+ // [SPARK-20328]. HadoopRDD calls into a Hadoop library that fetches
delegation tokens with
+ // renewer set to the YARN ResourceManager. Since YARN isn't
configured in Mesos mode, we
+ // must trick it into thinking we're YARN.
+ if (clusterManager == MESOS && UserGroupInformation.isSecurityEnabled)
{
+ val shortUserName =
UserGroupInformation.getCurrentUser.getShortUserName
+ val key = s"spark.hadoop.${YarnConfiguration.RM_PRINCIPAL}"
--- End diff --
> So do you mean that currently this only works until the delegation tokens
need renewal (which is 1 day by default - a lot shorter than the max life time)?
Yes
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