Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25525865
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -313,6 +320,21 @@ private[spark] class Client(
env("SPARK_YARN_MODE") = "true"
env("SPARK_YARN_STAGING_DIR") = stagingDir
env("SPARK_USER") =
UserGroupInformation.getCurrentUser().getShortUserName()
+ // If we logged in from keytab, make sure we copy the keytab to the
staging directory on
+ // HDFS, and setup the relevant environment vars, so the AM can login
again.
+ if (loginFromKeytab) {
+ val fs = FileSystem.get(hadoopConf)
+ val stagingDirPath = new Path(fs.getHomeDirectory, stagingDir)
+ val localUri = new URI(args.keytab)
+ val localPath = getQualifiedLocalPath(localUri, hadoopConf)
+ val destinationPath = new Path(stagingDirPath, keytabFileName)
+ val replication =
sparkConf.getInt("spark.yarn.submit.file.replication",
--- End diff --
we already get this in spark.yarn.submit.file.replication, would be nice to
only get it once and reuse.
Seems like this would belong in prepareLocalResources, just change
description of it slightly.
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