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From berngp <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-1522] : YARN ClientBase throws a NPE if...
Date Fri, 18 Apr 2014 03:37:36 GMT
Github user berngp commented on a diff in the pull request:

    https://github.com/apache/spark/pull/433#discussion_r11763060
  
    --- Diff: yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala ---
    @@ -378,55 +378,48 @@ object ClientBase {
       val APP_JAR: String = "app.jar"
       val LOG4J_PROP: String = "log4j.properties"
     
    -  // Based on code from org.apache.hadoop.mapreduce.v2.util.MRApps
    -  def populateHadoopClasspath(conf: Configuration, env: HashMap[String, String]) {
    -    val classpathEntries = Option(conf.getStrings(
    -      YarnConfiguration.YARN_APPLICATION_CLASSPATH)).getOrElse(
    -        getDefaultYarnApplicationClasspath())
    -    for (c <- classpathEntries) {
    -      YarnSparkHadoopUtil.addToEnvironment(env, Environment.CLASSPATH.name, c.trim,
    -        File.pathSeparator)
    -    }
    +  def populateHadoopClasspath(conf: Configuration, env: HashMap[String, String]) = {
    +    val classPathElementsToAdd = getYarnAppClasspath(conf) ++ getMRAppClasspath(conf)
    +    addToAppClasspath(env, classPathElementsToAdd)
    +    classPathElementsToAdd
    +  }
     
    -    val mrClasspathEntries = Option(conf.getStrings(
    -      "mapreduce.application.classpath")).getOrElse(
    -        getDefaultMRApplicationClasspath())
    -    if (mrClasspathEntries != null) {
    -      for (c <- mrClasspathEntries) {
    -        YarnSparkHadoopUtil.addToEnvironment(env, Environment.CLASSPATH.name, c.trim,
    -          File.pathSeparator)
    -      }
    -    }
    +  protected[yarn] def getYarnAppClasspath(conf: Configuration) = 
    +    getAppClasspathForKey(YarnConfiguration.YARN_APPLICATION_CLASSPATH, conf)(getDefaultYarnApplicationClasspath)
    +
    +  protected[yarn] def getMRAppClasspath(conf: Configuration) =
    +    getAppClasspathForKey("mapreduce.application.classpath", conf)(getDefaultMRApplicationClasspath)
    +
    +  protected[yarn] def addToAppClasspath(env: HashMap[String, String], elements : Iterable[String])
{
    +    for ( c <- elements ) 
    +      yield (YarnSparkHadoopUtil.addToEnvironment(env, Environment.CLASSPATH.name, c.trim,
File.pathSeparator))
    --- End diff --
    
    I kept the `for (c <- classPathElementsToAdd.flatten)`, to be honest the `yield` was
a remanence of a different approach.


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