YARN-11298. Improve Yarn Router Junit Test Close MockRM.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/clientrm/MockClientRequestInterceptor.java

@@ -31,8 +31,10 @@
 public class MockClientRequestInterceptor
     extends DefaultClientRequestInterceptor {
 
+  MockRM mockRM = null;
+
   public void init(String user) {
-    MockRM mockRM = new MockRM(super.getConf()) {
+    mockRM = new MockRM(super.getConf()) {
       @Override
       protected ClientRMService createClientRMService() {
         return new ClientRMService(getRMContext(), getResourceScheduler(),
@@ -68,4 +70,11 @@ public MoveApplicationAcrossQueuesResponse moveApplicationAcrossQueues(
     super.setRMClient(mockRM.getClientRMService());
   }
 
+  @Override
+  public void shutdown() {
+    if (mockRM != null) {
+      mockRM.stop();
+    }
+    super.shutdown();
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/clientrm/TestableFederationClientInterceptor.java

@@ -48,6 +48,8 @@
 import org.apache.hadoop.yarn.server.resourcemanager.security.RMDelegationTokenSecretManager;
 import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
 import org.junit.Assert;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Extends the FederationClientInterceptor and overrides methods to provide a
@@ -56,6 +58,9 @@
 public class TestableFederationClientInterceptor
     extends FederationClientInterceptor {
 
+  private static final Logger LOG =
+      LoggerFactory.getLogger(TestableFederationClientInterceptor.class);
+
   private ConcurrentHashMap<SubClusterId, MockRM> mockRMs =
       new ConcurrentHashMap<>();
 
@@ -161,4 +166,31 @@ private void initNodeAttributes(SubClusterId subClusterId, MockRM mockRM)  {
       throw new RuntimeException(e);
     }
   }
+
+  @Override
+  public void shutdown() {
+    if (mockRMs != null && !mockRMs.isEmpty()) {
+      for (Map.Entry<SubClusterId, MockRM> item : mockRMs.entrySet()) {
+        SubClusterId subClusterId = item.getKey();
+
+        // close mockNM
+        MockNM mockNM = mockNMs.getOrDefault(subClusterId, null);
+        try {
+          mockNM.unRegisterNode();
+          mockNM = null;
+        } catch (Exception e) {
+          LOG.error("mockNM unRegisterNode error.", e);
+        }
+
+        // close mockRM
+        MockRM mockRM = item.getValue();
+        if (mockRM != null) {
+          mockRM.stop();
+        }
+      }
+    }
+    mockNMs.clear();
+    mockRMs.clear();
+    super.shutdown();
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/rmadmin/MockRMAdminRequestInterceptor.java

@@ -32,8 +32,9 @@
 public class MockRMAdminRequestInterceptor
     extends DefaultRMAdminRequestInterceptor {
 
+  MockRM mockRM = null;
   public void init(String user) {
-    MockRM mockRM = new MockRM(super.getConf()) {
+    mockRM = new MockRM(super.getConf()) {
       @Override
       protected AdminService createAdminService() {
         return new AdminService(this) {
@@ -60,4 +61,12 @@ protected void stopServer() {
     mockRM.start();
     super.setRMAdmin(mockRM.getAdminService());
   }
+
+  @Override
+  public void shutdown() {
+    if (mockRM != null) {
+      mockRM.stop();
+    }
+    super.shutdown();
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/secure/AbstractSecureRouterTest.java

@@ -20,6 +20,7 @@
 import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
 import org.apache.hadoop.minikdc.MiniKdc;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
@@ -34,6 +35,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.File;
+import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -107,6 +109,8 @@ public static void beforeSecureRouterTestClass() throws Exception {
     // Router Kerberos KeyTab configuration
     conf.set(YarnConfiguration.ROUTER_PRINCIPAL, ROUTER_LOCALHOST_REALM);
     conf.set(YarnConfiguration.ROUTER_KEYTAB, routerKeytab.getAbsolutePath());
+
+    DefaultMetricsSystem.setMiniClusterMode(true);
   }
 
   /**
@@ -214,6 +218,12 @@ protected synchronized void stopSecureRouter() throws Exception {
   public static void afterSecureRouterTest() throws Exception {
     LOG.info("teardown of kdc instance.");
     teardownKDC();
+    if (mockRMs != null && mockRMs.isEmpty()) {
+      for (MockRM mockRM : mockRMs.values()) {
+        mockRM.close();
+      }
+    }
+    mockRMs.clear();
   }
 
   public static MiniKdc getKdc() {