Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25913622
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -61,12 +64,15 @@ private[spark] class Client(
private val yarnClient = YarnClient.createYarnClient
private val yarnConf = new YarnConfiguration(hadoopConf)
- private val credentials =
UserGroupInformation.getCurrentUser.getCredentials
+ private var credentials: Credentials = null
private val amMemoryOverhead = args.amMemoryOverhead // MB
private val executorMemoryOverhead = args.executorMemoryOverhead // MB
private val distCacheMgr = new ClientDistributedCacheManager()
private val isClusterMode = args.isClusterMode
+ private var loginFromKeytab = false
+ private var keytabFileName: String = null
+
--- End diff --
nit: too many blank lines
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