Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/2001#discussion_r16906649
--- Diff:
yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientClusterScheduler.scala
---
@@ -36,4 +36,18 @@ private[spark] class YarnClientClusterScheduler(sc:
SparkContext, conf: Configur
val host = Utils.parseHostPort(hostPort)._1
Option(YarnSparkHadoopUtil.lookupRack(conf, host))
}
+
+ override def postStartHook() {
+ Runtime.getRuntime.addShutdownHook(new Thread with Logging {
--- End diff --
Also, it's a better idea to use Hadoop's `ShutdownHookManager`. That allows
you to make sure this runs before the HDFS shutdown hook, and avoid ugly
exceptions (like "file system closed") showing up. See ApplicationMaster.scala,
for example.
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