Revert "[SPARK-31746][YARN][TESTS] Show the actual error message in L…

…ocalityPlacementStrategySuite"

This reverts commit cbd8568.

resource-managers/yarn/src/test/scala/org/apache/spark/deploy/yarn/LocalityPlacementStrategySuite.scala

@@ -17,8 +17,7 @@
 
 package org.apache.spark.deploy.yarn
 
-import java.io.{PrintWriter, StringWriter}
-
+import scala.collection.JavaConverters._
 import scala.collection.mutable.{HashMap, HashSet, Set}
 
 import org.apache.hadoop.yarn.api.records._
@@ -46,11 +45,7 @@ class LocalityPlacementStrategySuite extends SparkFunSuite {
     thread.start()
     thread.join()
 
-    if (error != null) {
-      val errors = new StringWriter()
-      error.printStackTrace(new PrintWriter(errors))
-      fail(s"StackOverflowError should not be thrown; however, got:\n\n$errors")
-    }
+    assert(error === null)
   }
 
   private def runTest(): Unit = {
@@ -61,6 +56,7 @@ class LocalityPlacementStrategySuite extends SparkFunSuite {
     // goal is to create enough requests for localized containers (so there should be many
     // tasks on several hosts that have no allocated containers).
 
+    val resource = Resource.newInstance(8 * 1024, 4)
     val strategy = new LocalityPreferredContainerPlacementStrategy(new SparkConf(),
       yarnConf, resource, new MockResolver())