Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/9272#discussion_r44863646
--- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala ---
@@ -521,8 +521,18 @@ object SparkSubmit {
sysProps.put("spark.yarn.isPython", "true")
}
if (args.principal != null) {
- require(args.keytab != null, "Keytab must be specified when the
keytab is specified")
- UserGroupInformation.loginUserFromKeytab(args.principal,
args.keytab)
+ require(args.keytab != null, "Keytab must be specified when
principal is specified")
+ if (!new File(args.keytab).exists()) {
+ throw new SparkException(s"Keytab file: ${args.keytab} does not
exist")
+ } else {
+ // Add keytab and principal configurations in sysProps to make
them available
+ // for later use (e.g. by spark sql). These Configurations will
be set as
--- End diff --
Let's be more specific on the use case of spark sql. Let's say the isolated
class loader used to talk to HiveMetastore will use these settings.
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