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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