YARN-4805. Don't go through all schedulers in ParameterizedTestBase. (kasha)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/ParameterizedSchedulerTestBase.java

@@ -23,19 +23,13 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.Capacity
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairSchedulerConfiguration;
 
-
 import org.junit.Before;
-import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
 
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.PrintWriter;
-import java.util.Arrays;
-import java.util.Collection;
 
-@RunWith(Parameterized.class)
 public abstract class ParameterizedSchedulerTestBase {
   protected final static String TEST_DIR =
       new File(System.getProperty("test.build.data", "/tmp")).getAbsolutePath();
@@ -49,31 +43,23 @@ public abstract class ParameterizedSchedulerTestBase {
     CAPACITY, FAIR
   }
 
-  public ParameterizedSchedulerTestBase(SchedulerType type) {
-    schedulerType = type;
-  }
-
   public YarnConfiguration getConf() {
     return conf;
   }
 
-  @Parameterized.Parameters
-  public static Collection<SchedulerType[]> getParameters() {
-    return Arrays.asList(new SchedulerType[][]{
-        {SchedulerType.CAPACITY}, {SchedulerType.FAIR}});
-  }
-
   @Before
-  public void configureScheduler() throws IOException {
+  public void configureScheduler() throws IOException, ClassNotFoundException {
     conf = new YarnConfiguration();
-    switch (schedulerType) {
-      case CAPACITY:
-        conf.set(YarnConfiguration.RM_SCHEDULER,
-            CapacityScheduler.class.getName());
-        break;
-      case FAIR:
-        configureFairScheduler(conf);
-        break;
+
+    Class schedulerClass =
+        conf.getClass(YarnConfiguration.RM_SCHEDULER,
+            Class.forName(YarnConfiguration.DEFAULT_RM_SCHEDULER));
+
+    if (schedulerClass == FairScheduler.class) {
+      schedulerType = SchedulerType.FAIR;
+      configureFairScheduler(conf);
+    } else if (schedulerClass == CapacityScheduler.class) {
+      schedulerType = SchedulerType.CAPACITY;
     }
   }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRM.java

@@ -91,10 +91,6 @@ public class TestRM extends ParameterizedSchedulerTestBase {
 
   private YarnConfiguration conf;
 
-  public TestRM(SchedulerType type) {
-    super(type);
-  }
-
   @Before
   public void setup() {
     conf = getConf();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java

@@ -136,10 +136,6 @@ public class TestRMRestart extends ParameterizedSchedulerTestBase {
   private static InetSocketAddress rmAddr;
   private List<MockRM> rms = new ArrayList<MockRM>();
 
-  public TestRMRestart(SchedulerType type) {
-    super(type);
-  }
-
   @Before
   public void setup() throws IOException {
     conf = getConf();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestWorkPreservingRMRestart.java

@@ -89,7 +89,6 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies.Dom
 import org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer;
 import org.apache.hadoop.yarn.util.ControlledClock;
 import org.apache.hadoop.yarn.util.Records;
-import org.apache.hadoop.yarn.util.SystemClock;
 import org.apache.hadoop.yarn.util.resource.DominantResourceCalculator;
 import org.apache.hadoop.yarn.util.resource.ResourceCalculator;
 import org.apache.hadoop.yarn.util.resource.Resources;
@@ -100,23 +99,15 @@ import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
 import com.google.common.base.Supplier;
 
-
 @SuppressWarnings({"rawtypes", "unchecked"})
-@RunWith(value = Parameterized.class)
 public class TestWorkPreservingRMRestart extends ParameterizedSchedulerTestBase {
 
   private YarnConfiguration conf;
   MockRM rm1 = null;
   MockRM rm2 = null;
 
-  public TestWorkPreservingRMRestart(SchedulerType type) {
-    super(type);
-  }
-
   @Before
   public void setup() throws UnknownHostException {
     Logger rootLogger = LogManager.getRootLogger();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/TestReservationSystem.java

@@ -53,10 +53,6 @@ public class TestReservationSystem extends
   private Configuration conf;
   private RMContext mockRMContext;
 
-  public TestReservationSystem(SchedulerType type) {
-    super(type);
-  }
-
   @Before
   public void setUp() throws IOException {
     scheduler = initializeScheduler();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestAbstractYarnScheduler.java

@@ -83,10 +83,6 @@ import org.mockito.Mockito;
 @SuppressWarnings("unchecked")
 public class TestAbstractYarnScheduler extends ParameterizedSchedulerTestBase {
 
-  public TestAbstractYarnScheduler(SchedulerType type) {
-    super(type);
-  }
-
   @Test
   public void testMaximimumAllocationMemory() throws Exception {
     final int node1MaxMemory = 15 * 1024;
@@ -268,7 +264,6 @@ public class TestAbstractYarnScheduler extends ParameterizedSchedulerTestBase {
     Resource configuredMaximumResource = Resource.newInstance
         (configuredMaxMemory, configuredMaxVCores);
 
-    configureScheduler();
     YarnConfiguration conf = getConf();
     conf.setInt(YarnConfiguration.RM_SCHEDULER_MAXIMUM_ALLOCATION_VCORES,
         configuredMaxVCores);
@@ -323,7 +318,6 @@ public class TestAbstractYarnScheduler extends ParameterizedSchedulerTestBase {
     Resource configuredMaximumResource = Resource.newInstance
         (configuredMaxMemory, configuredMaxVCores);
 
-    configureScheduler();
     YarnConfiguration conf = getConf();
     conf.setInt(YarnConfiguration.RM_SCHEDULER_MAXIMUM_ALLOCATION_VCORES,
         configuredMaxVCores);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/security/TestClientToAMTokens.java

@@ -84,10 +84,6 @@ import org.junit.Test;
 public class TestClientToAMTokens extends ParameterizedSchedulerTestBase {
   private YarnConfiguration conf;
 
-  public TestClientToAMTokens(SchedulerType type) {
-    super(type);
-  }
-
   @Before
   public void setup() {
     conf = getConf();