Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/16923#discussion_r102361738
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala
---
@@ -106,21 +106,27 @@ private[hive] class HiveClientImpl(
// Set up kerberos credentials for UserGroupInformation.loginUser
within
// current class loader
- // Instead of using the spark conf of the current spark context, a new
- // instance of SparkConf is needed for the original value of
spark.yarn.keytab
- // and spark.yarn.principal set in SparkSubmit, as yarn.Client resets
the
- // keytab configuration for the link name in distributed cache
- if (sparkConf.contains("spark.yarn.principal") &&
sparkConf.contains("spark.yarn.keytab")) {
+ if (sparkConf.contains("spark.yarn.principal")) {
--- End diff --
Ok, I think I can see a cleaner solution that what I proposed. Sorry for
flip-flopping on this.
Instead of overwriting the `KEYTAB` value in Client.scala, instead, how
about:
- keep the keytab name in an instance variable
- don't update SparkConf, and use the instance variable in the `distribute`
call (around L470)
- when writing the AM conf, overwrite `KEYTAB.key` in the properties
instance (around L708)
That avoids the second config, and keeps all the code to handle the
different locations in one place (Client.scala), without having to change
anywhere else.
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