YARN-4014. Support user cli interface in for Application Priority. Contributed by Rohith Sharma K S

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ResourceMgrDelegate.java

@@ -61,6 +61,7 @@ import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.QueueUserACLInfo;
 import org.apache.hadoop.yarn.api.records.YarnApplicationState;
 import org.apache.hadoop.yarn.api.records.YarnClusterMetrics;
@@ -466,4 +467,10 @@ public class ResourceMgrDelegate extends YarnClient {
       throws YarnException, IOException {
     return client.getClusterNodeLabels();
   }
+
+  @Override
+  public void updateApplicationPriority(ApplicationId applicationId,
+      Priority priority) throws YarnException, IOException {
+    client.updateApplicationPriority(applicationId, priority);
+  }
 }

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestClientRedirect.java

@@ -114,6 +114,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ApplicationReport;
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
@@ -444,6 +446,13 @@ public class TestClientRedirect {
         GetLabelsToNodesRequest request) throws YarnException, IOException {
       return null;
     }
+
+    @Override
+    public UpdateApplicationPriorityResponse updateApplicationPriority(
+        UpdateApplicationPriorityRequest request) throws YarnException,
+        IOException {
+      return null;
+    }
   }
 
   class HistoryService extends AMService implements HSClientProtocol {

hadoop-yarn-project/CHANGES.txt

@@ -181,6 +181,9 @@ Release 2.8.0 - UNRELEASED
     YARN-221. NM should provide a way for AM to tell it not to aggregate logs.
     (Ming Ma via xgong)
 
+    YARN-4014. Support user cli interface in for Application Priority.
+    (Rohith Sharma K S via jianhe)
+
   IMPROVEMENTS
 
     YARN-644. Basic null check is not performed on passed in arguments before

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/ApplicationClientProtocol.java

@@ -51,6 +51,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -419,4 +421,20 @@ public interface ApplicationClientProtocol extends ApplicationBaseProtocol {
   @Unstable
   public GetClusterNodeLabelsResponse getClusterNodeLabels(
       GetClusterNodeLabelsRequest request) throws YarnException, IOException;
+
+  /**
+   * <p>
+   * The interface used by client to set priority of an application.
+   * </p>
+   * @param request to set priority of an application
+   * @return an empty response
+   * @throws YarnException
+   * @throws IOException
+   */
+  @Public
+  @Unstable
+  @Idempotent
+  public UpdateApplicationPriorityResponse updateApplicationPriority(
+      UpdateApplicationPriorityRequest request) throws YarnException,
+      IOException;
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/UpdateApplicationPriorityRequest.java

@@ -0,0 +1,80 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.api.protocolrecords;
+
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
+import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
+import org.apache.hadoop.yarn.api.records.ApplicationId;
+import org.apache.hadoop.yarn.api.records.Priority;
+import org.apache.hadoop.yarn.util.Records;
+
+/**
+ * <p>
+ * The request sent by the client to the <code>ResourceManager</code> to set or
+ * update the application priority.
+ * </p>
+ * <p>
+ * The request includes the {@link ApplicationId} of the application and
+ * {@link Priority} to be set for an application
+ * </p>
+ * 
+ * @see ApplicationClientProtocol#updateApplicationPriority(UpdateApplicationPriorityRequest)
+ */
+
+@Public
+@Unstable
+public abstract class UpdateApplicationPriorityRequest {
+  public static UpdateApplicationPriorityRequest newInstance(
+      ApplicationId applicationId, Priority priority) {
+    UpdateApplicationPriorityRequest request =
+        Records.newRecord(UpdateApplicationPriorityRequest.class);
+    request.setApplicationId(applicationId);
+    request.setApplicationPriority(priority);
+    return request;
+  }
+
+  /**
+   * Get the <code>ApplicationId</code> of the application.
+   * 
+   * @return <code>ApplicationId</code> of the application
+   */
+  public abstract ApplicationId getApplicationId();
+
+  /**
+   * Set the <code>ApplicationId</code> of the application.
+   * 
+   * @param applicationId <code>ApplicationId</code> of the application
+   */
+  public abstract void setApplicationId(ApplicationId applicationId);
+
+  /**
+   * Get the <code>Priority</code> of the application to be set.
+   * 
+   * @return <code>Priority</code> of the application to be set.
+   */
+  public abstract Priority getApplicationPriority();
+
+  /**
+   * Set the <code>Priority</code> of the application.
+   * 
+   * @param priority <code>Priority</code> of the application
+   */
+  public abstract void setApplicationPriority(Priority priority);
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/UpdateApplicationPriorityResponse.java

@@ -0,0 +1,47 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.api.protocolrecords;
+
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
+import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
+import org.apache.hadoop.yarn.util.Records;
+
+/**
+ * <p>
+ * The response sent by the <code>ResourceManager</code> to the client on update
+ * the application priority.
+ * </p>
+ * <p>
+ * A response without exception means that the move has completed successfully.
+ * </p>
+ * 
+ * @see ApplicationClientProtocol#updateApplicationPriority(UpdateApplicationPriorityRequest)
+ */
+
+@Public
+@Unstable
+public abstract class UpdateApplicationPriorityResponse {
+
+  public static UpdateApplicationPriorityResponse newInstance() {
+    UpdateApplicationPriorityResponse response =
+        Records.newRecord(UpdateApplicationPriorityResponse.class);
+    return response;
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/applicationclient_protocol.proto

@@ -55,4 +55,5 @@ service ApplicationClientProtocolService {
   rpc getNodeToLabels (GetNodesToLabelsRequestProto) returns (GetNodesToLabelsResponseProto);
   rpc getLabelsToNodes (GetLabelsToNodesRequestProto) returns (GetLabelsToNodesResponseProto);
   rpc getClusterNodeLabels (GetClusterNodeLabelsRequestProto) returns (GetClusterNodeLabelsResponseProto);
+  rpc updateApplicationPriority (UpdateApplicationPriorityRequestProto) returns (UpdateApplicationPriorityResponseProto);
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto

@@ -216,6 +216,14 @@ message GetClusterNodeLabelsResponseProto {
   repeated NodeLabelProto nodeLabels = 1;
 }
 
+message UpdateApplicationPriorityRequestProto {
+  required ApplicationIdProto applicationId = 1;
+  required PriorityProto applicationPriority = 2;
+}
+
+message UpdateApplicationPriorityResponseProto {
+}
+
 //////////////////////////////////////////////////////
 /////// client_NM_Protocol ///////////////////////////
 //////////////////////////////////////////////////////

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/YarnClient.java

@@ -38,6 +38,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptReport;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -49,6 +51,7 @@ import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.QueueInfo;
 import org.apache.hadoop.yarn.api.records.QueueUserACLInfo;
 import org.apache.hadoop.yarn.api.records.ReservationDefinition;
@@ -666,4 +669,18 @@ public abstract class YarnClient extends AbstractService {
   @Unstable
   public abstract List<NodeLabel> getClusterNodeLabels()
       throws YarnException, IOException;
+
+  /**
+   * <p>
+   * The interface used by client to set priority of an application
+   * </p>
+   * @param applicationId
+   * @param priority
+   * @throws YarnException
+   * @throws IOException
+   */
+  @Public
+  @Unstable
+  public abstract void updateApplicationPriority(ApplicationId applicationId,
+      Priority priority) throws YarnException, IOException;
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/YarnClientImpl.java

@@ -77,6 +77,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptReport;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -89,6 +91,7 @@ import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.QueueInfo;
 import org.apache.hadoop.yarn.api.records.QueueUserACLInfo;
 import org.apache.hadoop.yarn.api.records.Token;
@@ -820,4 +823,12 @@ public class YarnClientImpl extends YarnClient {
     return rmClient.getClusterNodeLabels(
         GetClusterNodeLabelsRequest.newInstance()).getNodeLabels();
   }
+
+  @Override
+  public void updateApplicationPriority(ApplicationId applicationId,
+      Priority priority) throws YarnException, IOException {
+    UpdateApplicationPriorityRequest request =
+        UpdateApplicationPriorityRequest.newInstance(applicationId, priority);
+    rmClient.updateApplicationPriority(request);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/ApplicationCLI.java

@@ -43,6 +43,7 @@ import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ApplicationReport;
 import org.apache.hadoop.yarn.api.records.ApplicationResourceUsageReport;
 import org.apache.hadoop.yarn.api.records.ContainerReport;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.YarnApplicationState;
 import org.apache.hadoop.yarn.exceptions.ApplicationAttemptNotFoundException;
 import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException;
@@ -73,6 +74,8 @@ public class ApplicationCLI extends YarnCLI {
   public static final String APPLICATION = "application";
   public static final String APPLICATION_ATTEMPT = "applicationattempt";
   public static final String CONTAINER = "container";
+  public static final String APP_ID = "appId";
+  public static final String UPDATE_PRIORITY = "updatePriority";
 
   private boolean allAppStates;
 
@@ -117,10 +120,16 @@ public class ApplicationCLI extends YarnCLI {
       appStateOpt.setArgs(Option.UNLIMITED_VALUES);
       appStateOpt.setArgName("States");
       opts.addOption(appStateOpt);
+      opts.addOption(APP_ID, true, "Specify Application Id to be operated");
+      opts.addOption(UPDATE_PRIORITY, true,
+          "update priority of an application. ApplicationId can be"
+              + " passed using 'appId' option.");
       opts.getOption(KILL_CMD).setArgName("Application ID");
       opts.getOption(MOVE_TO_QUEUE_CMD).setArgName("Application ID");
       opts.getOption(QUEUE_CMD).setArgName("Queue Name");
       opts.getOption(STATUS_CMD).setArgName("Application ID");
+      opts.getOption(APP_ID).setArgName("Application ID");
+      opts.getOption(UPDATE_PRIORITY).setArgName("Priority");
     } else if (args.length > 0 && args[0].equalsIgnoreCase(APPLICATION_ATTEMPT)) {
       title = APPLICATION_ATTEMPT;
       opts.addOption(STATUS_CMD, true,
@@ -238,6 +247,13 @@ public class ApplicationCLI extends YarnCLI {
     } else if (cliParser.hasOption(HELP_CMD)) {
       printUsage(title, opts);
       return 0;
+    } else if (cliParser.hasOption(UPDATE_PRIORITY)) {
+      if (!cliParser.hasOption(APP_ID)) {
+        printUsage(title, opts);
+        return exitCode;
+      }
+      updateApplicationPriority(cliParser.getOptionValue(APP_ID),
+          cliParser.getOptionValue(UPDATE_PRIORITY));
     } else {
       syserr.println("Invalid Command Usage : ");
       printUsage(title, opts);
@@ -619,4 +635,17 @@ public class ApplicationCLI extends YarnCLI {
     }
     writer.flush();
   }
+
+  /**
+   * Updates priority of an application with the given ID.
+   */
+  private void updateApplicationPriority(String applicationId, String priority)
+      throws YarnException, IOException {
+    ApplicationId appId = ConverterUtils.toApplicationId(applicationId);
+    Priority newAppPriority = Priority.newInstance(Integer.parseInt(priority));
+    sysout.println("Updating priority of an aplication " + applicationId);
+    client.updateApplicationPriority(appId, newAppPriority);
+    sysout.println("Successfully updated the priority of any application "
+        + applicationId);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java

@@ -1409,6 +1409,31 @@ public class TestYarnCLI {
     Assert.assertNotSame("should return non-zero exit code.", 0, exitCode);
   }
 
+  @Test(timeout = 60000)
+  public void testUpdateApplicationPriority() throws Exception {
+    ApplicationCLI cli = createAndGetAppCLI();
+    ApplicationId applicationId = ApplicationId.newInstance(1234, 6);
+
+    ApplicationReport appReport =
+        ApplicationReport.newInstance(applicationId,
+            ApplicationAttemptId.newInstance(applicationId, 1), "user",
+            "queue", "appname", "host", 124, null,
+            YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
+            FinalApplicationStatus.UNDEFINED, null, "N/A", 0.53789f, "YARN",
+            null);
+    when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
+        appReport);
+
+    int result =
+        cli.run(new String[] { "application", "-appId",
+            applicationId.toString(),
+        "-updatePriority", "1" });
+    Assert.assertEquals(result, 0);
+    verify(client).updateApplicationPriority(any(ApplicationId.class),
+        any(Priority.class));
+
+  }
+
   private void verifyUsageInfo(YarnCLI cli) throws Exception {
     cli.setSysErrPrintStream(sysErr);
     cli.run(new String[] { "application" });
@@ -1458,6 +1483,7 @@ public class TestYarnCLI {
     ByteArrayOutputStream baos = new ByteArrayOutputStream();
     PrintWriter pw = new PrintWriter(baos);
     pw.println("usage: application");
+    pw.println(" -appId <Application ID>         Specify Application Id to be operated");
     pw.println(" -appStates <States>             Works with -list to filter applications");
     pw.println("                                 based on input comma-separated list of");
     pw.println("                                 application states. The valid application");
@@ -1480,6 +1506,9 @@ public class TestYarnCLI {
     pw.println("                                 specify which queue to move an");
     pw.println("                                 application to.");
     pw.println(" -status <Application ID>        Prints the status of the application.");
+    pw.println(" -updatePriority <Priority>      update priority of an application.");
+    pw.println("                                 ApplicationId can be passed using 'appId'");
+    pw.println("                                 option.");
     pw.close();
     String appsHelpStr = baos.toString("UTF-8");
     return appsHelpStr;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/client/ApplicationClientProtocolPBClientImpl.java

@@ -75,6 +75,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.CancelDelegationTokenRequestPBImpl;
@@ -121,6 +123,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationSubmissionR
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationSubmissionResponsePBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationUpdateRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationUpdateResponsePBImpl;
+import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.UpdateApplicationPriorityRequestPBImpl;
+import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.UpdateApplicationPriorityResponsePBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.SubmitApplicationRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.SubmitApplicationResponsePBImpl;
 import org.apache.hadoop.yarn.exceptions.YarnException;
@@ -143,6 +147,8 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.MoveApplicationAcrossQueue
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationDeleteRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationSubmissionRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationUpdateRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityResponseProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.SubmitApplicationRequestProto;
 
 import com.google.protobuf.ServiceException;
@@ -507,4 +513,18 @@ public class ApplicationClientProtocolPBClientImpl implements ApplicationClientP
       return null;
     }
   }
+
+  @Override
+  public UpdateApplicationPriorityResponse updateApplicationPriority(
+      UpdateApplicationPriorityRequest request) throws YarnException, IOException {
+    UpdateApplicationPriorityRequestProto requestProto =
+        ((UpdateApplicationPriorityRequestPBImpl) request).getProto();
+    try {
+      return new UpdateApplicationPriorityResponsePBImpl(
+          proxy.updateApplicationPriority(null, requestProto));
+    } catch (ServiceException e) {
+      RPCUtil.unwrapAndThrowException(e);
+      return null;
+    }
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/service/ApplicationClientProtocolPBServiceImpl.java

@@ -51,6 +51,7 @@ import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationDeleteResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.CancelDelegationTokenRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.CancelDelegationTokenResponsePBImpl;
@@ -96,6 +97,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationSubmissionR
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationSubmissionResponsePBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationUpdateRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.ReservationUpdateResponsePBImpl;
+import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.UpdateApplicationPriorityRequestPBImpl;
+import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.UpdateApplicationPriorityResponsePBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.SubmitApplicationRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.SubmitApplicationResponsePBImpl;
 import org.apache.hadoop.yarn.exceptions.YarnException;
@@ -137,6 +140,8 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationSubmissionReque
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationSubmissionResponseProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationUpdateRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.ReservationUpdateResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityResponseProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.SubmitApplicationRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.SubmitApplicationResponseProto;
 
@@ -507,4 +512,21 @@ public class ApplicationClientProtocolPBServiceImpl implements ApplicationClient
       throw new ServiceException(e);
     }
   }
+
+  @Override
+  public UpdateApplicationPriorityResponseProto updateApplicationPriority(
+      RpcController controller, UpdateApplicationPriorityRequestProto proto)
+      throws ServiceException {
+    UpdateApplicationPriorityRequestPBImpl request =
+        new UpdateApplicationPriorityRequestPBImpl(proto);
+    try {
+      UpdateApplicationPriorityResponse response =
+          real.updateApplicationPriority(request);
+      return ((UpdateApplicationPriorityResponsePBImpl) response).getProto();
+    } catch (YarnException e) {
+      throw new ServiceException(e);
+    } catch (IOException e) {
+      throw new ServiceException(e);
+    }
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/UpdateApplicationPriorityRequestPBImpl.java

@@ -0,0 +1,171 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.api.protocolrecords.impl.pb;
+
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.records.ApplicationId;
+import org.apache.hadoop.yarn.api.records.Priority;
+import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationIdPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.PriorityPBImpl;
+import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationIdProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.PriorityProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityRequestProtoOrBuilder;
+
+import com.google.protobuf.TextFormat;
+
+@Private
+@Unstable
+public class UpdateApplicationPriorityRequestPBImpl extends
+    UpdateApplicationPriorityRequest {
+
+  UpdateApplicationPriorityRequestProto proto =
+      UpdateApplicationPriorityRequestProto
+      .getDefaultInstance();
+  UpdateApplicationPriorityRequestProto.Builder builder = null;
+  boolean viaProto = false;
+
+  private ApplicationId applicationId = null;
+  private Priority applicationPriority = null;
+
+  public UpdateApplicationPriorityRequestPBImpl() {
+    builder = UpdateApplicationPriorityRequestProto.newBuilder();
+  }
+
+  public UpdateApplicationPriorityRequestPBImpl(
+      UpdateApplicationPriorityRequestProto proto) {
+    this.proto = proto;
+    viaProto = true;
+  }
+
+  public UpdateApplicationPriorityRequestProto getProto() {
+    mergeLocalToProto();
+    proto = viaProto ? proto : builder.build();
+    viaProto = true;
+    return proto;
+  }
+
+  private void mergeLocalToProto() {
+    if (viaProto)
+      maybeInitBuilder();
+    mergeLocalToBuilder();
+    proto = builder.build();
+    viaProto = true;
+  }
+
+  private void maybeInitBuilder() {
+    if (viaProto || builder == null) {
+      builder = UpdateApplicationPriorityRequestProto.newBuilder(proto);
+    }
+    viaProto = false;
+  }
+
+  private void mergeLocalToBuilder() {
+    if (this.applicationId != null) {
+      builder.setApplicationId(convertToProtoFormat(this.applicationId));
+    }
+    if (this.applicationPriority != null) {
+      builder
+          .setApplicationPriority(convertToProtoFormat(this.applicationPriority));
+    }
+  }
+
+  @Override
+  public Priority getApplicationPriority() {
+    UpdateApplicationPriorityRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
+    if (this.applicationPriority != null) {
+      return this.applicationPriority;
+    }
+    if (!p.hasApplicationPriority()) {
+      return null;
+    }
+    this.applicationPriority =
+        convertFromProtoFormat(p.getApplicationPriority());
+    return this.applicationPriority;
+  }
+
+  @Override
+  public void setApplicationPriority(Priority priority) {
+    maybeInitBuilder();
+    if (priority == null)
+      builder.clearApplicationPriority();
+    this.applicationPriority = priority;
+  }
+
+  @Override
+  public ApplicationId getApplicationId() {
+    UpdateApplicationPriorityRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
+    if (this.applicationId != null) {
+      return applicationId;
+    } // Else via proto
+    if (!p.hasApplicationId()) {
+      return null;
+    }
+    applicationId = convertFromProtoFormat(p.getApplicationId());
+    return applicationId;
+  }
+
+  @Override
+  public void setApplicationId(ApplicationId applicationId) {
+    maybeInitBuilder();
+    if (applicationId == null)
+      builder.clearApplicationId();
+    this.applicationId = applicationId;
+  }
+
+  private PriorityPBImpl convertFromProtoFormat(PriorityProto p) {
+    return new PriorityPBImpl(p);
+  }
+
+  private PriorityProto convertToProtoFormat(Priority t) {
+    return ((PriorityPBImpl) t).getProto();
+  }
+
+  private ApplicationIdPBImpl convertFromProtoFormat(ApplicationIdProto p) {
+    return new ApplicationIdPBImpl(p);
+  }
+
+  private ApplicationIdProto convertToProtoFormat(ApplicationId t) {
+    return ((ApplicationIdPBImpl) t).getProto();
+  }
+
+  @Override
+  public int hashCode() {
+    return getProto().hashCode();
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null)
+      return false;
+    if (other.getClass().isAssignableFrom(this.getClass())) {
+      return this.getProto().equals(this.getClass().cast(other).getProto());
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return TextFormat.shortDebugString(getProto());
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/UpdateApplicationPriorityResponsePBImpl.java

@@ -0,0 +1,69 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.api.protocolrecords.impl.pb;
+
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
+import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateApplicationPriorityResponseProto;
+
+import com.google.protobuf.TextFormat;
+
+public class UpdateApplicationPriorityResponsePBImpl extends
+    UpdateApplicationPriorityResponse {
+
+  UpdateApplicationPriorityResponseProto proto =
+      UpdateApplicationPriorityResponseProto.getDefaultInstance();
+  UpdateApplicationPriorityResponseProto.Builder builder = null;
+  boolean viaProto = false;
+
+  public UpdateApplicationPriorityResponsePBImpl() {
+    builder = UpdateApplicationPriorityResponseProto.newBuilder();
+  }
+
+  public UpdateApplicationPriorityResponsePBImpl(
+      UpdateApplicationPriorityResponseProto proto) {
+    this.proto = proto;
+    viaProto = true;
+  }
+
+  public UpdateApplicationPriorityResponseProto getProto() {
+    proto = viaProto ? proto : builder.build();
+    viaProto = true;
+    return proto;
+  }
+
+  @Override
+  public int hashCode() {
+    return getProto().hashCode();
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null)
+      return false;
+    if (other.getClass().isAssignableFrom(this.getClass())) {
+      return this.getProto().equals(this.getClass().cast(other).getProto());
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return TextFormat.shortDebugString(getProto());
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java

@@ -93,6 +93,8 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
@@ -105,6 +107,7 @@ import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ContainerReport;
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.QueueACL;
 import org.apache.hadoop.yarn.api.records.QueueInfo;
 import org.apache.hadoop.yarn.api.records.ReservationDefinition;
@@ -1304,4 +1307,74 @@ public class ClientRMService extends AbstractService implements
     }
     return callerUGI.getShortUserName();
   }
+
+  @Override
+  public UpdateApplicationPriorityResponse updateApplicationPriority(
+      UpdateApplicationPriorityRequest request) throws YarnException,
+      IOException {
+
+    ApplicationId applicationId = request.getApplicationId();
+    Priority newAppPriority = request.getApplicationPriority();
+    UserGroupInformation callerUGI;
+    try {
+      callerUGI = UserGroupInformation.getCurrentUser();
+    } catch (IOException ie) {
+      LOG.info("Error getting UGI ", ie);
+      RMAuditLogger.logFailure("UNKNOWN", AuditConstants.UPDATE_APP_PRIORITY,
+          "UNKNOWN", "ClientRMService", "Error getting UGI", applicationId);
+      throw RPCUtil.getRemoteException(ie);
+    }
+
+    RMApp application = this.rmContext.getRMApps().get(applicationId);
+    if (application == null) {
+      RMAuditLogger.logFailure(callerUGI.getUserName(),
+          AuditConstants.UPDATE_APP_PRIORITY, "UNKNOWN", "ClientRMService",
+          "Trying to update priority of an absent application", applicationId);
+      throw new ApplicationNotFoundException(
+          "Trying to update priority o an absent application " + applicationId);
+    }
+
+    if (!checkAccess(callerUGI, application.getUser(),
+        ApplicationAccessType.MODIFY_APP, application)) {
+      RMAuditLogger.logFailure(callerUGI.getShortUserName(),
+          AuditConstants.UPDATE_APP_PRIORITY,
+          "User doesn't have permissions to "
+              + ApplicationAccessType.MODIFY_APP.toString(), "ClientRMService",
+          AuditConstants.UNAUTHORIZED_USER, applicationId);
+      throw RPCUtil.getRemoteException(new AccessControlException("User "
+          + callerUGI.getShortUserName() + " cannot perform operation "
+          + ApplicationAccessType.MODIFY_APP.name() + " on " + applicationId));
+    }
+
+    // Update priority only when app is tracked by the scheduler
+    if (!EnumSet.of(RMAppState.ACCEPTED, RMAppState.RUNNING).contains(
+        application.getState())) {
+      String msg =
+          "Application in " + application.getState()
+              + " state cannot be update priority.";
+      RMAuditLogger
+          .logFailure(callerUGI.getShortUserName(),
+              AuditConstants.UPDATE_APP_PRIORITY, "UNKNOWN", "ClientRMService",
+              msg);
+      throw new YarnException(msg);
+    }
+
+    try {
+      rmContext.getScheduler().updateApplicationPriority(newAppPriority,
+          applicationId);
+    } catch (YarnException ex) {
+      RMAuditLogger.logFailure(callerUGI.getShortUserName(),
+          AuditConstants.UPDATE_APP_PRIORITY, "UNKNOWN", "ClientRMService",
+          ex.getMessage());
+      throw ex;
+    }
+
+    RMAuditLogger.logSuccess(callerUGI.getShortUserName(),
+        AuditConstants.UPDATE_APP_PRIORITY, "ClientRMService", applicationId);
+    UpdateApplicationPriorityResponse response =
+        recordFactory
+            .newRecordInstance(UpdateApplicationPriorityResponse.class);
+    return response;
+  }
+
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAuditLogger.java

@@ -54,6 +54,8 @@ public class RMAuditLogger {
     public static final String UNREGISTER_AM = "Unregister App Master";
     public static final String ALLOC_CONTAINER = "AM Allocated Container";
     public static final String RELEASE_CONTAINER = "AM Released Container";
+    public static final String UPDATE_APP_PRIORITY =
+        "Update Application Priority Request";
 
     // Some commonly used descriptions
     public static final String UNAUTHORIZED_USER = "Unauthorized user";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java

@@ -116,7 +116,7 @@ public abstract class RMStateStore extends AbstractService {
       .addTransition(RMStateStoreState.ACTIVE, RMStateStoreState.ACTIVE,
           RMStateStoreEventType.STORE_APP, new StoreAppTransition())
       .addTransition(RMStateStoreState.ACTIVE, RMStateStoreState.ACTIVE,
-          RMStateStoreEventType.UPDATE_APP, new UpdateAppTransition())
+              RMStateStoreEventType.UPDATE_APP, new UpdateAppTransition())
       .addTransition(RMStateStoreState.ACTIVE, RMStateStoreState.ACTIVE,
           RMStateStoreEventType.REMOVE_APP, new RemoveAppTransition())
       .addTransition(RMStateStoreState.ACTIVE, RMStateStoreState.ACTIVE,
@@ -215,8 +215,10 @@ public abstract class RMStateStore extends AbstractService {
       LOG.info("Updating info for app: " + appId);
       try {
         store.updateApplicationStateInternal(appId, appState);
-        store.notifyApplication(new RMAppEvent(appId,
-               RMAppEventType.APP_UPDATE_SAVED));
+        if (((RMStateUpdateAppEvent) event).isNotifyApplication()) {
+          store.notifyApplication(new RMAppEvent(appId,
+              RMAppEventType.APP_UPDATE_SAVED));
+        }
       } catch (Exception e) {
         LOG.error("Error updating app: " + appId, e);
         store.notifyStoreOperationFailed(e);
@@ -707,8 +709,8 @@ public abstract class RMStateStore extends AbstractService {
   }
 
   public void updateApplicationStateSynchronously(
-      ApplicationStateData appState) {
-    handleStoreEvent(new RMStateUpdateAppEvent(appState));
+      ApplicationStateData appState, boolean notifyApp) {
+    handleStoreEvent(new RMStateUpdateAppEvent(appState, notifyApp));
   }
 
   public void updateFencedState() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateUpdateAppEvent.java

@@ -22,13 +22,26 @@ import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.Applicatio
 
 public class RMStateUpdateAppEvent extends RMStateStoreEvent {
   private final ApplicationStateData appState;
+  // After application state is updated in state store,
+  // should notify back to application or not
+  private boolean notifyApplication;
 
   public RMStateUpdateAppEvent(ApplicationStateData appState) {
     super(RMStateStoreEventType.UPDATE_APP);
     this.appState = appState;
+    this.notifyApplication = true;
+  }
+
+  public RMStateUpdateAppEvent(ApplicationStateData appState, boolean notifyApp) {
+    this(appState);
+    this.notifyApplication = notifyApp;
   }
 
   public ApplicationStateData getAppState() {
     return appState;
   }
+
+  public boolean isNotifyApplication() {
+    return notifyApplication;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacityScheduler.java

@@ -785,6 +785,17 @@ public class CapacityScheduler extends
     }
     application.setCurrentAppAttempt(attempt);
 
+    // Update attempt priority to the latest to avoid race condition i.e
+    // SchedulerApplicationAttempt is created with old priority but it is not
+    // set to SchedulerApplication#setCurrentAppAttempt.
+    // Scenario would occur is
+    // 1. SchdulerApplicationAttempt is created with old priority.
+    // 2. updateApplicationPriority() updates SchedulerApplication. Since
+    // currentAttempt is null, it just return.
+    // 3. ScheduelerApplcationAttempt is set in
+    // SchedulerApplication#setCurrentAppAttempt.
+    attempt.setPriority(application.getPriority());
+
     queue.submitApplicationAttempt(attempt, application.getUser());
     LOG.info("Added Application Attempt " + applicationAttemptId
         + " to scheduler from user " + application.getUser() + " in queue "
@@ -1853,7 +1864,7 @@ public class CapacityScheduler extends
   }
 
   @Override
-  public synchronized void updateApplicationPriority(Priority newPriority,
+  public void updateApplicationPriority(Priority newPriority,
       ApplicationId applicationId) throws YarnException {
     Priority appPriority = null;
     SchedulerApplication<FiCaSchedulerApp> application = applications
@@ -1879,7 +1890,8 @@ public class CapacityScheduler extends
     ApplicationStateData appState = ApplicationStateData.newInstance(
         rmApp.getSubmitTime(), rmApp.getStartTime(),
         rmApp.getApplicationSubmissionContext(), rmApp.getUser());
-    rmContext.getStateStore().updateApplicationStateSynchronously(appState);
+    rmContext.getStateStore().updateApplicationStateSynchronously(appState,
+        false);
 
     // As we use iterator over a TreeSet for OrderingPolicy, once we change
     // priority then reinsert back to make order correct.

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

@@ -87,6 +87,7 @@ import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest;
 import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -102,6 +103,7 @@ import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.QueueACL;
 import org.apache.hadoop.yarn.api.records.QueueInfo;
 import org.apache.hadoop.yarn.api.records.ReservationDefinition;
@@ -131,6 +133,7 @@ import org.apache.hadoop.yarn.server.resourcemanager.reservation.ReservationSyst
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppEvent;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl;
+import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl;
 import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
@@ -1543,4 +1546,64 @@ public class TestClientRMService {
     rpc.stopProxy(client, conf);
     rm.close();
   }
+
+  @Test(timeout = 120000)
+  public void testUpdateApplicationPriorityRequest() throws Exception {
+    int maxPriority = 10;
+    int appPriorty = 5;
+    YarnConfiguration conf = new YarnConfiguration();
+    conf.setInt(YarnConfiguration.MAX_CLUSTER_LEVEL_APPLICATION_PRIORITY,
+        maxPriority);
+    MockRM rm = new MockRM(conf);
+    rm.init(conf);
+    rm.start();
+
+    // Start app1 with appPriority 5
+    RMApp app1 = rm.submitApp(1024, Priority.newInstance(appPriorty));
+
+    Assert.assertEquals("Incorrect priority has been set to application",
+        appPriorty, app1.getApplicationSubmissionContext().getPriority()
+            .getPriority());
+
+    appPriorty = 9;
+    ClientRMService rmService = rm.getClientRMService();
+    UpdateApplicationPriorityRequest updateRequest =
+        UpdateApplicationPriorityRequest.newInstance(app1.getApplicationId(),
+            Priority.newInstance(appPriorty));
+
+    rmService.updateApplicationPriority(updateRequest);
+
+    Assert.assertEquals("Incorrect priority has been set to application",
+        appPriorty, app1.getApplicationSubmissionContext().getPriority()
+            .getPriority());
+
+    rm.killApp(app1.getApplicationId());
+    rm.waitForState(app1.getApplicationId(), RMAppState.KILLED);
+
+    // Update priority request for application in KILLED state
+    try {
+      rmService.updateApplicationPriority(updateRequest);
+      Assert.fail("Can not update priority for an application in KILLED state");
+    } catch (YarnException e) {
+      String msg =
+          "Application in " + app1.getState()
+              + " state cannot be update priority.";
+      Assert.assertTrue("", msg.contains(e.getMessage()));
+    }
+
+    // Update priority request for invalid application id.
+    ApplicationId invalidAppId = ApplicationId.newInstance(123456789L, 3);
+    updateRequest =
+        UpdateApplicationPriorityRequest.newInstance(invalidAppId,
+            Priority.newInstance(appPriorty));
+    try {
+      rmService.updateApplicationPriority(updateRequest);
+      Assert
+          .fail("ApplicationNotFoundException should be thrown for invalid application id");
+    } catch (ApplicationNotFoundException e) {
+      // Expected
+    }
+
+    rm.stop();
+  }
 }