[GitHub] srowen commented on a change in pull request #23801: [SPARK-26891][YARN] Fixing flaky test in YarnSchedulerBackendSuite

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srowen commented on a change in pull request #23801: [SPARK-26891][YARN] Fixing flaky test in YarnSchedulerBackendSuite
URL: https://github.com/apache/spark/pull/23801#discussion_r257517261
 
 

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 File path: resource-managers/yarn/src/test/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackendSuite.scala
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 @@ -32,15 +33,33 @@ import org.apache.spark.ui.TestFilter
 
 class YarnSchedulerBackendSuite extends SparkFunSuite with MockitoSugar with LocalSparkContext {
 
+  private var yarnSchedulerBackend: YarnSchedulerBackend = _
+
+  override def afterEach() {
+    try {
+      yarnSchedulerBackend.stop()
 
 Review comment:
   Should this check if it's null, in case some tests don't set it? they might all do so now.

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