[GitHub] spark pull request #18519: [SPARK-16742] Mesos Kerberos Support

[vanzin <gi...@git.apache.org>]

Github user vanzin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18519#discussion_r132032720
  
    --- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala ---
    @@ -680,6 +686,18 @@ object SparkSubmit extends CommandLineUtils {
         (childArgs, childClasspath, sysProps, childMainClass)
       }
     
    +  // [SPARK-20328]. HadoopRDD calls into a Hadoop library that fetches delegation tokens with
    +  // renewer set to the YARN ResourceManager.  Since YARN isn't configured in Mesos mode, we
    +  // must trick it into thinking we're YARN.
    +  private def setRMPrincipal(sysProps: HashMap[String, String]): Unit = {
    +    val shortUserName = UserGroupInformation.getCurrentUser.getShortUserName
    +    val key = s"spark.hadoop.${YarnConfiguration.RM_PRINCIPAL}"
    +    // scalastyle:off println
    +    printStream.println(s"Setting ${key} to ${shortUserName}")
    --- End diff --
    
    Do you want this to be printed out every time someone runs spark-submit? Sounds a bit noisy.


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