diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 3a0956227d7..1512c830687 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -1249,6 +1249,9 @@ Release 2.8.0 - UNRELEASED
     YARN-4608. Redundant code statement in WritingYarnApplications.
     (Kai Sasaki via aajisaka)
 
+    YARN-4605. Spelling mistake in the help message of "yarn applicationattempt"
+    command. (Weiwei Yang via aajisaka)
+
 Release 2.7.3 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/ApplicationCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/ApplicationCLI.java
index bdd6215539d..77e06885d68 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/ApplicationCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/ApplicationCLI.java
@@ -138,7 +138,7 @@ public class ApplicationCLI extends YarnCLI {
       opts.addOption(STATUS_CMD, true,
           "Prints the status of the application attempt.");
       opts.addOption(LIST_CMD, true,
-          "List application attempts for aplication.");
+          "List application attempts for application.");
       opts.addOption(FAIL_CMD, true, "Fails application attempt.");
       opts.addOption(HELP_CMD, false, "Displays help for all commands.");
       opts.getOption(STATUS_CMD).setArgName("Application Attempt ID");
@@ -712,7 +712,7 @@ public class ApplicationCLI extends YarnCLI {
       throws YarnException, IOException {
     ApplicationId appId = ConverterUtils.toApplicationId(applicationId);
     Priority newAppPriority = Priority.newInstance(Integer.parseInt(priority));
-    sysout.println("Updating priority of an aplication " + applicationId);
+    sysout.println("Updating priority of an application " + applicationId);
     Priority updateApplicationPriority =
         client.updateApplicationPriority(appId, newAppPriority);
     if (newAppPriority.equals(updateApplicationPriority)) {
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java
index 1a77c7ca907..95ccccfd6be 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java
@@ -1721,7 +1721,7 @@ public class TestYarnCLI {
     pw.println(" -fail <Application Attempt ID>     Fails application attempt.");
     pw.println(" -help                              Displays help for all commands.");
     pw.println(" -list <Application ID>             List application attempts for");
-    pw.println("                                    aplication.");
+    pw.println("                                    application.");
     pw.println(" -status <Application Attempt ID>   Prints the status of the application");
     pw.println("                                    attempt.");
     pw.close();
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java
index 39e0916a0ea..069037c0e9f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java
@@ -438,7 +438,7 @@ public class ClientRMService extends AbstractService implements
       response = GetApplicationAttemptsResponse.newInstance(listAttempts);
     } else {
       throw new YarnException("User " + callerUGI.getShortUserName()
-          + " does not have privilage to see this aplication " + appId);
+          + " does not have privilage to see this application " + appId);
     }
     return response;
   }
@@ -489,7 +489,7 @@ public class ClientRMService extends AbstractService implements
           .createContainerReport());
     } else {
       throw new YarnException("User " + callerUGI.getShortUserName()
-          + " does not have privilage to see this aplication " + appId);
+          + " does not have privilage to see this application " + appId);
     }
     return response;
   }
@@ -542,7 +542,7 @@ public class ClientRMService extends AbstractService implements
       response = GetContainersResponse.newInstance(listContainers);
     } else {
       throw new YarnException("User " + callerUGI.getShortUserName()
-          + " does not have privilage to see this aplication " + appId);
+          + " does not have privilage to see this application " + appId);
     }
     return response;
   }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestClientRMService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestClientRMService.java
index 98dc87a4018..0f892cdf690 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestClientRMService.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestClientRMService.java
@@ -1338,10 +1338,10 @@ public class TestClientRMService {
 
     appPriority = 11;
     ClientRMService rmService = rm.getClientRMService();
-    testAplicationPriorityUpdation(rmService, app1, appPriority, maxPriority);
+    testApplicationPriorityUpdation(rmService, app1, appPriority, maxPriority);
 
     appPriority = 9;
-    testAplicationPriorityUpdation(rmService, app1, appPriority, appPriority);
+    testApplicationPriorityUpdation(rmService, app1, appPriority, appPriority);
 
     rm.killApp(app1.getApplicationId());
     rm.waitForState(app1.getApplicationId(), RMAppState.KILLED);
@@ -1370,7 +1370,7 @@ public class TestClientRMService {
     rm.stop();
   }
 
-  private void testAplicationPriorityUpdation(ClientRMService rmService,
+  private void testApplicationPriorityUpdation(ClientRMService rmService,
       RMApp app1, int tobeUpdatedPriority, int expected) throws YarnException,
       IOException {
     UpdateApplicationPriorityRequest updateRequest =