YARN-11203. Fix typo in hadoop-yarn-server-router module. (#4510). Contributed by fanshilun.

Reviewed-by: Fei Hui <feihui.ustc@gmail.com>
Signed-off-by: Ayush Saxena <ayushsaxena@apache.org>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/AbstractClientRequestInterceptor.java

@@ -29,7 +29,7 @@ import org.slf4j.LoggerFactory;
 /**
  * Implements the {@link ClientRequestInterceptor} interface and provides common
  * functionality which can can be used and/or extended by other concrete
- * intercepter classes.
+ * interceptor classes.
  *
  */
 public abstract class AbstractClientRequestInterceptor

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/ClientRequestInterceptor.java

@@ -22,14 +22,14 @@ import org.apache.hadoop.conf.Configurable;
 import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
 
 /**
- * Defines the contract to be implemented by the request intercepter classes,
+ * Defines the contract to be implemented by the request interceptor classes,
  * that can be used to intercept and inspect messages sent from the client to
  * the resource manager.
  */
 public interface ClientRequestInterceptor
     extends ApplicationClientProtocol, Configurable {
   /**
-   * This method is called for initializing the intercepter. This is guaranteed
+   * This method is called for initializing the interceptor. This is guaranteed
    * to be called only once in the lifetime of this instance.
    *
    * @param user the name of the client
@@ -37,28 +37,28 @@ public interface ClientRequestInterceptor
   void init(String user);
 
   /**
-   * This method is called to release the resources held by the intercepter.
+   * This method is called to release the resources held by the interceptor.
    * This will be called when the application pipeline is being destroyed. The
    * concrete implementations should dispose the resources and forward the
-   * request to the next intercepter, if any.
+   * request to the next interceptor, if any.
    */
   void shutdown();
 
   /**
-   * Sets the next intercepter in the pipeline. The concrete implementation of
+   * Sets the next interceptor in the pipeline. The concrete implementation of
    * this interface should always pass the request to the nextInterceptor after
-   * inspecting the message. The last intercepter in the chain is responsible to
+   * inspecting the message. The last interceptor in the chain is responsible to
    * send the messages to the resource manager service and so the last
-   * intercepter will not receive this method call.
+   * interceptor will not receive this method call.
    *
    * @param nextInterceptor the ClientRequestInterceptor to set in the pipeline
    */
   void setNextInterceptor(ClientRequestInterceptor nextInterceptor);
 
   /**
-   * Returns the next intercepter in the chain.
+   * Returns the next interceptor in the chain.
    *
-   * @return the next intercepter in the chain
+   * @return the next interceptor in the chain
    */
   ClientRequestInterceptor getNextInterceptor();
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/FederationClientInterceptor.java

@@ -141,7 +141,7 @@ import org.apache.hadoop.classification.VisibleForTesting;
  * Extends the {@code AbstractRequestInterceptorClient} class and provides an
  * implementation for federation of YARN RM and scaling an application across
  * multiple YARN SubClusters. All the federation specific implementation is
- * encapsulated in this class. This is always the last intercepter in the chain.
+ * encapsulated in this class. This is always the last interceptor in the chain.
  */
 public class FederationClientInterceptor
     extends AbstractClientRequestInterceptor {
@@ -662,7 +662,7 @@ public class FederationClientInterceptor
    * Router: the Client will timeout and resubmit the request.
    *
    * ResourceManager: the Router calls each Yarn RM in parallel. In case a
-   * Yarn RM fails, a single call will timeout. However the Router will
+   * Yarn RM fails, a single call will timeout. However, the Router will
    * merge the ApplicationReports it got, and provides a partial list to
    * the client.
    *

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/RouterClientRMService.java

@@ -202,10 +202,10 @@ public class RouterClientRMService extends AbstractService
   }
 
   /**
-   * Returns the comma separated intercepter class names from the configuration.
+   * Returns the comma separated interceptor class names from the configuration.
    *
    * @param conf
-   * @return the intercepter class names as an instance of ArrayList
+   * @return the interceptor class names as an instance of ArrayList
    */
   private List<String> getInterceptorClassNames(Configuration conf) {
     String configuredInterceptorClassNames =
@@ -489,9 +489,9 @@ public class RouterClientRMService extends AbstractService
   }
 
   /**
-   * Gets the Request intercepter chains for all the users.
+   * Gets the Request interceptor chains for all the users.
    *
-   * @return the request intercepter chains.
+   * @return the request interceptor chains.
    */
   @VisibleForTesting
   protected Map<String, RequestInterceptorChainWrapper> getPipelines() {
@@ -499,10 +499,10 @@ public class RouterClientRMService extends AbstractService
   }
 
   /**
-   * This method creates and returns reference of the first intercepter in the
-   * chain of request intercepter instances.
+   * This method creates and returns reference of the first interceptor in the
+   * chain of request interceptor instances.
    *
-   * @return the reference of the first intercepter in the chain
+   * @return the reference of the first interceptor in the chain
    */
   @VisibleForTesting
   protected ClientRequestInterceptor createRequestInterceptorChain() {
@@ -548,7 +548,7 @@ public class RouterClientRMService extends AbstractService
   }
 
   /**
-   * Initializes the request intercepter pipeline for the specified application.
+   * Initializes the request interceptor pipeline for the specified application.
    *
    * @param user
    */
@@ -600,9 +600,9 @@ public class RouterClientRMService extends AbstractService
     }
 
     /**
-     * Gets the root request intercepter.
+     * Gets the root request interceptor.
      *
-     * @return the root request intercepter
+     * @return the root request interceptor
      */
     public synchronized ClientRequestInterceptor getRootInterceptor() {
       return rootInterceptor;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/AbstractRMAdminRequestInterceptor.java

@@ -23,7 +23,7 @@ import org.apache.hadoop.conf.Configuration;
 /**
  * Implements the {@link RMAdminRequestInterceptor} interface and provides
  * common functionality which can can be used and/or extended by other concrete
- * intercepter classes.
+ * interceptor classes.
  *
  */
 public abstract class AbstractRMAdminRequestInterceptor

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/RMAdminRequestInterceptor.java

@@ -22,14 +22,14 @@ import org.apache.hadoop.conf.Configurable;
 import org.apache.hadoop.yarn.server.api.ResourceManagerAdministrationProtocol;
 
 /**
- * Defines the contract to be implemented by the request intercepter classes,
+ * Defines the contract to be implemented by the request interceptor classes,
  * that can be used to intercept and inspect messages sent from the client to
  * the resource manager.
  */
 public interface RMAdminRequestInterceptor
     extends ResourceManagerAdministrationProtocol, Configurable {
   /**
-   * This method is called for initializing the intercepter. This is guaranteed
+   * This method is called for initializing the interceptor. This is guaranteed
    * to be called only once in the lifetime of this instance.
    *
    * @param user the name of the client
@@ -37,28 +37,28 @@ public interface RMAdminRequestInterceptor
   void init(String user);
 
   /**
-   * This method is called to release the resources held by the intercepter.
+   * This method is called to release the resources held by the interceptor.
    * This will be called when the application pipeline is being destroyed. The
    * concrete implementations should dispose the resources and forward the
-   * request to the next intercepter, if any.
+   * request to the next interceptor, if any.
    */
   void shutdown();
 
   /**
-   * Sets the next intercepter in the pipeline. The concrete implementation of
+   * Sets the next interceptor in the pipeline. The concrete implementation of
    * this interface should always pass the request to the nextInterceptor after
-   * inspecting the message. The last intercepter in the chain is responsible to
+   * inspecting the message. The last interceptor in the chain is responsible to
    * send the messages to the resource manager service and so the last
-   * intercepter will not receive this method call.
+   * interceptor will not receive this method call.
    *
    * @param nextInterceptor the RMAdminRequestInterceptor to set in the pipeline
    */
   void setNextInterceptor(RMAdminRequestInterceptor nextInterceptor);
 
   /**
-   * Returns the next intercepter in the chain.
+   * Returns the next interceptor in the chain.
    *
-   * @return the next intercepter in the chain
+   * @return the next interceptor in the chain
    */
   RMAdminRequestInterceptor getNextInterceptor();
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/RouterRMAdminService.java

@@ -82,7 +82,7 @@ import org.apache.hadoop.classification.VisibleForTesting;
  * messages from client to the cluster resource manager. It listens
  * {@code ResourceManagerAdministrationProtocol} messages from the client and
  * creates a request intercepting pipeline instance for each client. The
- * pipeline is a chain of intercepter instances that can inspect and modify the
+ * pipeline is a chain of interceptor instances that can inspect and modify the
  * request/response as needed. The main difference with AMRMProxyService is the
  * protocol they implement.
  */
@@ -165,10 +165,10 @@ public class RouterRMAdminService extends AbstractService
   }
 
   /**
-   * Returns the comma separated intercepter class names from the configuration.
+   * Returns the comma separated interceptor class names from the configuration.
    *
    * @param conf
-   * @return the intercepter class names as an instance of ArrayList
+   * @return the interceptor class names as an instance of ArrayList
    */
   private List<String> getInterceptorClassNames(Configuration conf) {
     String configuredInterceptorClassNames =
@@ -197,9 +197,9 @@ public class RouterRMAdminService extends AbstractService
   }
 
   /**
-   * Gets the Request intercepter chains for all the users.
+   * Gets the Request interceptor chains for all the users.
    *
-   * @return the request intercepter chains.
+   * @return the request interceptor chains.
    */
   @VisibleForTesting
   protected Map<String, RequestInterceptorChainWrapper> getPipelines() {
@@ -207,10 +207,10 @@ public class RouterRMAdminService extends AbstractService
   }
 
   /**
-   * This method creates and returns reference of the first intercepter in the
-   * chain of request intercepter instances.
+   * This method creates and returns reference of the first interceptor in the
+   * chain of request interceptor instances.
    *
-   * @return the reference of the first intercepter in the chain
+   * @return the reference of the first interceptor in the chain
    */
   @VisibleForTesting
   protected RMAdminRequestInterceptor createRequestInterceptorChain() {
@@ -257,7 +257,7 @@ public class RouterRMAdminService extends AbstractService
   }
 
   /**
-   * Initializes the request intercepter pipeline for the specified user.
+   * Initializes the request interceptor pipeline for the specified user.
    *
    * @param user
    */
@@ -308,9 +308,9 @@ public class RouterRMAdminService extends AbstractService
     }
 
     /**
-     * Gets the root request intercepter.
+     * Gets the root request interceptor.
      *
-     * @return the root request intercepter
+     * @return the root request interceptor
      */
     public synchronized RMAdminRequestInterceptor getRootInterceptor() {
       return rootInterceptor;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/AbstractRESTRequestInterceptor.java

@@ -22,7 +22,7 @@ import org.apache.hadoop.conf.Configuration;
 
 /**
  * Extends the RequestInterceptor class and provides common functionality which
- * can be used and/or extended by other concrete intercepter classes.
+ * can be used and/or extended by other concrete interceptor classes.
  */
 public abstract class AbstractRESTRequestInterceptor
     implements RESTRequestInterceptor {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/FederationInterceptorREST.java

@@ -111,7 +111,7 @@ import org.apache.hadoop.thirdparty.com.google.common.util.concurrent.ThreadFact
  * Extends the {@code AbstractRESTRequestInterceptor} class and provides an
  * implementation for federation of YARN RM and scaling an application across
  * multiple YARN SubClusters. All the federation specific implementation is
- * encapsulated in this class. This is always the last intercepter in the chain.
+ * encapsulated in this class. This is always the last interceptor in the chain.
  */
 public class FederationInterceptorREST extends AbstractRESTRequestInterceptor {
 
@@ -406,7 +406,7 @@ public class FederationInterceptorREST extends AbstractRESTRequestInterceptor {
     if (newApp == null || newApp.getApplicationId() == null) {
       routerMetrics.incrAppsFailedSubmitted();
       String errMsg = "Missing ApplicationSubmissionContextInfo or "
-          + "applicationSubmissionContex information.";
+          + "applicationSubmissionContext information.";
       return Response
           .status(Status.BAD_REQUEST)
           .entity(errMsg)
@@ -667,7 +667,7 @@ public class FederationInterceptorREST extends AbstractRESTRequestInterceptor {
    * <p>
    * ResourceManager: the Router calls each YARN RM in parallel by using one
    * thread for each YARN RM. In case a YARN RM fails, a single call will
-   * timeout. However the Router will merge the ApplicationReports it got, and
+   * timeout. However, the Router will merge the ApplicationReports it got, and
    * provides a partial list to the client.
    * <p>
    * State Store: the Router will timeout and it will retry depending on the
@@ -942,7 +942,7 @@ public class FederationInterceptorREST extends AbstractRESTRequestInterceptor {
    * <p>
    * ResourceManager: the Router calls each YARN RM in parallel by using one
    * thread for each YARN RM. In case a YARN RM fails, a single call will
-   * timeout. However the Router will use the NodesInfo it got, and provides a
+   * timeout. However, the Router will use the NodesInfo it got, and provides a
    * partial list to the client.
    * <p>
    * State Store: the Router will timeout and it will retry depending on the

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/RESTRequestInterceptor.java

@@ -29,7 +29,7 @@ import org.apache.hadoop.yarn.server.webapp.dao.ContainerInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo;
 
 /**
- * Defines the contract to be implemented by the request intercepter classes,
+ * Defines the contract to be implemented by the request interceptor classes,
  * that can be used to intercept and inspect messages sent from the client to
  * the resource manager server.
  *
@@ -42,7 +42,7 @@ public interface RESTRequestInterceptor
     extends RMWebServiceProtocol, Configurable {
 
   /**
-   * This method is called for initializing the intercepter. This is guaranteed
+   * This method is called for initializing the interceptor. This is guaranteed
    * to be called only once in the lifetime of this instance.
    *
    * @param user the name of the client
@@ -50,28 +50,28 @@ public interface RESTRequestInterceptor
   void init(String user);
 
   /**
-   * This method is called to release the resources held by the intercepter.
+   * This method is called to release the resources held by the interceptor.
    * This will be called when the application pipeline is being destroyed. The
    * concrete implementations should dispose the resources and forward the
-   * request to the next intercepter, if any.
+   * request to the next interceptor, if any.
    */
   void shutdown();
 
   /**
-   * Sets the next intercepter in the pipeline. The concrete implementation of
+   * Sets the next interceptor in the pipeline. The concrete implementation of
    * this interface should always pass the request to the nextInterceptor after
-   * inspecting the message. The last intercepter in the chain is responsible to
+   * inspecting the message. The last interceptor in the chain is responsible to
    * send the messages to the resource manager service and so the last
-   * intercepter will not receive this method call.
+   * interceptor will not receive this method call.
    *
    * @param nextInterceptor the RESTRequestInterceptor to set in the pipeline
    */
   void setNextInterceptor(RESTRequestInterceptor nextInterceptor);
 
   /**
-   * Returns the next intercepter in the chain.
+   * Returns the next interceptor in the chain.
    *
-   * @return the next intercepter in the chain
+   * @return the next interceptor in the chain
    */
   RESTRequestInterceptor getNextInterceptor();
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/RouterWebServiceUtil.java

@@ -83,7 +83,7 @@ public final class RouterWebServiceUtil {
   /**
    * Creates and performs a REST call to a specific WebService.
    *
-   * @param webApp the address of the remote webap
+   * @param webApp the address of the remote webapp
    * @param hsr the servlet request
    * @param returnType the return type of the REST call
    * @param <T> Type of return object.
@@ -170,7 +170,7 @@ public final class RouterWebServiceUtil {
 
   /**
    * Performs an invocation of a REST call on a remote RMWebService.
-   * @param webApp the address of the remote webap
+   * @param webApp the address of the remote webapp
    * @param path  to add to the webapp address
    * @param method the HTTP method of the REST call
    * @param additionalPath the servlet request path
@@ -280,7 +280,7 @@ public final class RouterWebServiceUtil {
 
   /**
    * Merges a list of AppInfo grouping by ApplicationId. Our current policy is
-   * to merge the application reports from the reacheable SubClusters. Via
+   * to merge the application reports from the reachable SubClusters. Via
    * configuration parameter, we decide whether to return applications for which
    * the primary AM is missing or to omit them.
    *
@@ -494,7 +494,7 @@ public final class RouterWebServiceUtil {
   protected static <T> String getMediaTypeFromHttpServletRequest(
       HttpServletRequest request, final Class<T> returnType) {
     if (request == null) {
-      // By default we return XML for REST call without HttpServletRequest
+      // By default, we return XML for REST call without HttpServletRequest
       return MediaType.APPLICATION_XML;
     }
     // TODO
@@ -503,7 +503,7 @@ public final class RouterWebServiceUtil {
     }
     String header = request.getHeader(HttpHeaders.ACCEPT);
     if (header == null || header.equals("*")) {
-      // By default we return JSON
+      // By default, we return JSON
       return MediaType.APPLICATION_JSON;
     }
     return header;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/RouterWebServices.java

@@ -141,10 +141,10 @@ public class RouterWebServices implements RMWebServiceProtocol {
   }
 
   /**
-   * Returns the comma separated intercepter class names from the configuration.
+   * Returns the comma separated interceptor class names from the configuration.
    *
    * @param conf
-   * @return the intercepter class names as an instance of ArrayList
+   * @return the interceptor class names as an instance of ArrayList
    */
   private List<String> getInterceptorClassNames(Configuration config) {
     String configuredInterceptorClassNames =
@@ -189,9 +189,9 @@ public class RouterWebServices implements RMWebServiceProtocol {
   }
 
   /**
-   * Gets the Request intercepter chains for all the users.
+   * Gets the Request interceptor chains for all the users.
    *
-   * @return the request intercepter chains.
+   * @return the request interceptor chains.
    */
   @VisibleForTesting
   protected Map<String, RequestInterceptorChainWrapper> getPipelines() {
@@ -199,10 +199,10 @@ public class RouterWebServices implements RMWebServiceProtocol {
   }
 
   /**
-   * This method creates and returns reference of the first intercepter in the
-   * chain of request intercepter instances.
+   * This method creates and returns reference of the first interceptor in the
+   * chain of request interceptor instances.
    *
-   * @return the reference of the first intercepter in the chain
+   * @return the reference of the first interceptor in the chain
    */
   @VisibleForTesting
   protected RESTRequestInterceptor createRequestInterceptorChain() {
@@ -247,7 +247,7 @@ public class RouterWebServices implements RMWebServiceProtocol {
   }
 
   /**
-   * Initializes the request intercepter pipeline for the specified user.
+   * Initializes the request interceptor pipeline for the specified user.
    *
    * @param user
    */
@@ -298,9 +298,9 @@ public class RouterWebServices implements RMWebServiceProtocol {
     }
 
     /**
-     * Gets the root request intercepter.
+     * Gets the root request interceptor.
      *
-     * @return the root request intercepter
+     * @return the root request interceptor
      */
     public synchronized RESTRequestInterceptor getRootInterceptor() {
       return rootInterceptor;

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

@@ -134,7 +134,7 @@ public abstract class BaseRouterClientRMTest {
     String mockPassThroughInterceptorClass =
         PassThroughClientRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
+    // Create a request interceptor pipeline for testing. The last one in the
     // chain will call the mock resource manager. The others in the chain will
     // simply forward it to the next one in the chain
     config.set(YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE,

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

@@ -93,8 +93,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationTimeoutsRespo
 import org.apache.hadoop.yarn.exceptions.YarnException;
 
 /**
- * Mock intercepter that does not do anything other than forwarding it to the
- * next intercepter in the chain.
+ * Mock interceptor that does not do anything other than forwarding it to the
+ * next interceptor in the chain.
  */
 public class PassThroughClientRequestInterceptor
     extends AbstractClientRequestInterceptor {

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

@@ -121,7 +121,7 @@ import org.slf4j.LoggerFactory;
  * use the {@code RouterClientRMService} pipeline test cases for testing the
  * {@code FederationInterceptor} class. The tests for
  * {@code RouterClientRMService} has been written cleverly so that it can be
- * reused to validate different request intercepter chains.
+ * reused to validate different request interceptor chains.
  */
 public class TestFederationClientInterceptor extends BaseRouterClientRMTest {
   private static final Logger LOG =
@@ -180,8 +180,8 @@ public class TestFederationClientInterceptor extends BaseRouterClientRMTest {
     String mockPassThroughInterceptorClass =
         PassThroughClientRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
-    // chain is the federation intercepter that calls the mock resource manager.
+    // Create a request interceptor pipeline for testing. The last one in the
+    // chain is the federation interceptor that calls the mock resource manager.
     // The others in the chain will simply forward it to the next one in the
     // chain
     conf.set(YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE,

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

@@ -54,7 +54,7 @@ import org.slf4j.LoggerFactory;
  * use the {@code RouterClientRMService} pipeline test cases for testing the
  * {@code FederationInterceptor} class. The tests for
  * {@code RouterClientRMService} has been written cleverly so that it can be
- * reused to validate different request intercepter chains.
+ * reused to validate different request interceptor chains.
  *
  * It tests the case with SubClusters down and the Router logic of retries. We
  * have 1 good SubCluster and 2 bad ones for all the tests.
@@ -137,8 +137,8 @@ public class TestFederationClientInterceptorRetry
     String mockPassThroughInterceptorClass =
         PassThroughClientRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
-    // chain is the federation intercepter that calls the mock resource manager.
+    // Create a request interceptor pipeline for testing. The last one in the
+    // chain is the federation interceptor that calls the mock resource manager.
     // The others in the chain will simply forward it to the next one in the
     // chain
     conf.set(YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE,

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

@@ -424,7 +424,7 @@ public class TestRouterYarnClientUtils {
     GetQueueUserAclsInfoResponse response3 = Records.newRecord(
         GetQueueUserAclsInfoResponse.class);
 
-    // null responce
+    // null response
     GetQueueUserAclsInfoResponse response4 = null;
 
     List<GetQueueUserAclsInfoResponse> responses = new ArrayList<>();

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

@@ -91,7 +91,7 @@ public abstract class BaseRouterRMAdminTest {
     String mockPassThroughInterceptorClass =
         PassThroughRMAdminRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
+    // Create a request interceptor pipeline for testing. The last one in the
     // chain will call the mock resource manager. The others in the chain will
     // simply forward it to the next one in the chain
     this.conf.set(YarnConfiguration.ROUTER_RMADMIN_INTERCEPTOR_CLASS_PIPELINE,

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

@@ -27,7 +27,7 @@ import org.apache.hadoop.yarn.server.resourcemanager.AdminService;
 import org.apache.hadoop.yarn.server.resourcemanager.MockRM;
 
 /**
- * This class mocks the RMAmdinRequestInterceptor.
+ * This class mocks the RMAdminRequestInterceptor.
  */
 public class MockRMAdminRequestInterceptor
     extends DefaultRMAdminRequestInterceptor {

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

@@ -52,8 +52,8 @@ import org.apache.hadoop.yarn.server.api.protocolrecords.UpdateNodeResourceReque
 import org.apache.hadoop.yarn.server.api.protocolrecords.UpdateNodeResourceResponse;
 
 /**
- * Mock intercepter that does not do anything other than forwarding it to the
- * next intercepter in the chain.
+ * Mock interceptor that does not do anything other than forwarding it to the
+ * next interceptor in the chain.
  */
 public class PassThroughRMAdminRequestInterceptor
     extends AbstractRMAdminRequestInterceptor {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/BaseRouterWebServicesTest.java

@@ -94,7 +94,7 @@ public abstract class BaseRouterWebServicesTest {
     String mockPassThroughInterceptorClass =
         PassThroughRESTRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
+    // Create a request interceptor pipeline for testing. The last one in the
     // chain will call the mock resource manager. The others in the chain will
     // simply forward it to the next one in the chain
     config.set(YarnConfiguration.ROUTER_WEBAPP_INTERCEPTOR_CLASS_PIPELINE,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/JavaProcess.java

@@ -34,15 +34,15 @@ public class JavaProcess {
     this(clazz, null, output);
   }
 
-  public JavaProcess(Class<?> clazz, List<String> addClasspaths, File output)
+  public JavaProcess(Class<?> clazz, List<String> addClassPaths, File output)
       throws IOException, InterruptedException {
     String javaHome = System.getProperty("java.home");
     String javaBin =
         javaHome + File.separator + "bin" + File.separator + "java";
     String classpath = System.getProperty("java.class.path");
     classpath = classpath.concat("./src/test/resources");
-    if (addClasspaths != null) {
-      for (String addClasspath : addClasspaths) {
+    if (addClassPaths != null) {
+      for (String addClasspath : addClassPaths) {
         classpath = classpath.concat(File.pathSeparatorChar + addClasspath);
       }
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/PassThroughRESTRequestInterceptor.java

@@ -62,8 +62,8 @@ import org.apache.hadoop.yarn.server.webapp.dao.ContainerInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo;
 
 /**
- * Mock intercepter that does not do anything other than forwarding it to the
- * next intercepter in the chain.
+ * Mock interceptor that does not do anything other than forwarding it to the
+ * next interceptor in the chain.
  */
 public class PassThroughRESTRequestInterceptor
     extends AbstractRESTRequestInterceptor {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/TestFederationInterceptorREST.java

@@ -61,7 +61,7 @@ import org.slf4j.LoggerFactory;
  * use the {@code RouterClientRMService} pipeline test cases for testing the
  * {@code FederationInterceptor} class. The tests for
  * {@code RouterClientRMService} has been written cleverly so that it can be
- * reused to validate different request intercepter chains.
+ * reused to validate different request interceptor chains.
  */
 public class TestFederationInterceptorREST extends BaseRouterWebServicesTest {
   private static final Logger LOG =
@@ -119,8 +119,8 @@ public class TestFederationInterceptorREST extends BaseRouterWebServicesTest {
     String mockPassThroughInterceptorClass =
         PassThroughRESTRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
-    // chain is the federation intercepter that calls the mock resource manager.
+    // Create a request interceptor pipeline for testing. The last one in the
+    // chain is the federation interceptor that calls the mock resource manager.
     // The others in the chain will simply forward it to the next one in the
     // chain
     conf.set(YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE,
@@ -239,7 +239,7 @@ public class TestFederationInterceptorREST extends BaseRouterWebServicesTest {
   }
 
   /**
-   * This test validates the correctness of SubmitApplication in case of of
+   * This test validates the correctness of SubmitApplication in case of
    * application in wrong format.
    */
   @Test

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/TestFederationInterceptorRESTRetry.java

@@ -139,8 +139,8 @@ public class TestFederationInterceptorRESTRetry
     String mockPassThroughInterceptorClass =
         PassThroughClientRequestInterceptor.class.getName();
 
-    // Create a request intercepter pipeline for testing. The last one in the
-    // chain is the federation intercepter that calls the mock resource manager.
+    // Create a request interceptor pipeline for testing. The last one in the
+    // chain is the federation interceptor that calls the mock resource manager.
     // The others in the chain will simply forward it to the next one in the
     // chain
     conf.set(YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE,