Github user pwendell commented on a diff in the pull request: https://github.com/apache/spark/pull/102#discussion_r10458176 --- Diff: yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala --- @@ -379,7 +381,17 @@ object ClientBase { // Based on code from org.apache.hadoop.mapreduce.v2.util.MRApps def populateHadoopClasspath(conf: Configuration, env: HashMap[String, String]) { - for (c <- conf.getStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH)) { + val classpathEntries = Option(conf.getStrings( --- End diff -- Hey just so I understand here. What is the way that YARN_APPLICATION_CLASSPATH and MAPREDUCE_APPLICATION_CCLASSPATH are used? Is this just designed to point to the locally installed Yarn/MR code? Or do users every go and include their own application code at these locations as well.
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