From 465893671c7514b1f38d4cbd568ceefa48737b1f Mon Sep 17 00:00:00 2001
From: Subhobrata Dey <sbcd90@gmail.com>
Date: Mon, 25 Apr 2016 22:11:17 -0400
Subject: [PATCH] [SPARK-14889][Spark Core] scala.MatchError: NONE (of class
 scala.Enumeration) when spark.scheduler.mode=NONE

---
 core/src/main/scala/org/apache/spark/scheduler/Pool.scala       | 2 ++
 .../scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/Pool.scala b/core/src/main/scala/org/apache/spark/scheduler/Pool.scala
index 4cd13e2feaeb1..a79e71ec7c9bf 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/Pool.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/Pool.scala
@@ -55,6 +55,8 @@ private[spark] class Pool(
         new FairSchedulingAlgorithm()
       case SchedulingMode.FIFO =>
         new FIFOSchedulingAlgorithm()
+      case _ =>
+        throw new IllegalArgumentException(s"Unsupported spark.scheduler.mode: $schedulingMode")
     }
   }
 
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
index c3159188d9f03..f31ec2af4ebd6 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
@@ -135,6 +135,8 @@ private[spark] class TaskSchedulerImpl(
           new FIFOSchedulableBuilder(rootPool)
         case SchedulingMode.FAIR =>
           new FairSchedulableBuilder(rootPool, conf)
+        case _ =>
+          throw new IllegalArgumentException(s"Unsupported spark.scheduler.mode: $schedulingMode")
       }
     }
     schedulableBuilder.buildPools()