[GitHub] spark pull request: Spark 2037: yarn client mode doesn't support s...

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

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

    https://github.com/apache/spark/pull/1180#discussion_r15289308
  
    --- Diff: yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala ---
    @@ -115,7 +117,30 @@ private[spark] class YarnClientSchedulerBackend(
         }
       }
     
    +  private def yarnApplicationStateCheckerThread(): Thread = {
    +    var sparkContextStop = false
    +    val t = new Thread {
    +      override def run() {
    +        while (!sparkContextStop) {
    +          val report = client.getApplicationReport(appId)
    +          val state = report.getYarnApplicationState()
    +          if (state != YarnApplicationState.RUNNING) {
    +            sparkContextStop = true
    +            logError(s"Yarn application already ended: $state")
    +            sc.stop()
    +          }
    +          Thread.sleep(1000L)
    +        }
    +      }
    +    }
    +    t.setDaemon(true)
    +    t.start()
    +    t
    +  }
    +
       override def stop() {
    +    checkerThread.interrupt()
    --- End diff --
    
    check to see if checkerThread != null before calling interrupt


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