diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/AllocateRequest.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/AllocateRequest.java
index ae0891e89af..d8d23478740 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/AllocateRequest.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/AllocateRequest.java
@@ -18,6 +18,7 @@
 
 package org.apache.hadoop.yarn.api.protocolrecords;
 
+import java.util.Collections;
 import java.util.List;
 
 import org.apache.hadoop.classification.InterfaceAudience.Public;
@@ -28,6 +29,7 @@ import org.apache.hadoop.yarn.api.records.Container;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ResourceBlacklistRequest;
 import org.apache.hadoop.yarn.api.records.ResourceRequest;
+import org.apache.hadoop.yarn.api.records.SchedulingRequest;
 import org.apache.hadoop.yarn.api.records.UpdateContainerRequest;
 import org.apache.hadoop.yarn.util.Records;
 
@@ -212,6 +214,32 @@ public abstract class AllocateRequest {
   public abstract void setUpdateRequests(
       List<UpdateContainerRequest> updateRequests);
 
+  /**
+   * Get the list of Scheduling requests being sent by the
+   * <code>ApplicationMaster</code>.
+   * @return list of {@link SchedulingRequest} being sent by the
+   *         <code>ApplicationMaster</code>.
+   */
+  @Public
+  @Unstable
+  public List<SchedulingRequest> getSchedulingRequests() {
+    return Collections.EMPTY_LIST;
+  }
+
+  /**
+   * Set the list of Scheduling requests to inform the
+   * <code>ResourceManager</code> about the application's resource requirements
+   * (potentially including allocation tags & placement constraints).
+   * @param schedulingRequests list of <code>SchedulingRequest</code> to update
+   *          the <code>ResourceManager</code> about the application's resource
+   *          requirements.
+   */
+  @Public
+  @Unstable
+  public void setSchedulingRequests(
+      List<SchedulingRequest> schedulingRequests) {
+  }
+
   @Public
   @Unstable
   public static AllocateRequestBuilder newBuilder() {
@@ -313,6 +341,20 @@ public abstract class AllocateRequest {
       return this;
     }
 
+    /**
+     * Set the <code>schedulingRequests</code> of the request.
+     * @see AllocateRequest#setSchedulingRequests(List)
+     * @param schedulingRequests <code>SchedulingRequest</code> of the request
+     * @return {@link AllocateRequestBuilder}
+     */
+    @Public
+    @Unstable
+    public AllocateRequestBuilder schedulingRequests(
+        List<SchedulingRequest> schedulingRequests) {
+      allocateRequest.setSchedulingRequests(schedulingRequests);
+      return this;
+    }
+
     /**
      * Return generated {@link AllocateRequest} object.
      * @return {@link AllocateRequest}
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceSizing.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceSizing.java
index d82be11017c..8cdc63fdc7d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceSizing.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceSizing.java
@@ -61,4 +61,31 @@ public abstract class ResourceSizing {
   @Public
   @Unstable
   public abstract void setResources(Resource resources);
+
+  @Override
+  public int hashCode() {
+    int result = getResources().hashCode();
+    result = 31 * result + getNumAllocations();
+    return result;
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if(obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+
+    ResourceSizing that = (ResourceSizing) obj;
+
+    if(getNumAllocations() != that.getNumAllocations()) {
+      return  false;
+    }
+    if(!getResources().equals(that.getResources())) {
+      return false;
+    }
+    return true;
+  }
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/SchedulingRequest.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/SchedulingRequest.java
index 47a0697f878..e32dd24624c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/SchedulingRequest.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/SchedulingRequest.java
@@ -49,6 +49,7 @@ public abstract class SchedulingRequest {
     return SchedulingRequest.newBuilder()
         .allocationRequestId(allocationRequestId).priority(priority)
         .executionType(executionType).allocationTags(allocationTags)
+        .resourceSizing(resourceSizing)
         .placementConstraintExpression(placementConstraintExpression).build();
   }
 
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto
index 68e585d15bc..e49c4e34d1b 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto
@@ -91,6 +91,7 @@ message AllocateRequestProto {
   optional int32 response_id = 4;
   optional float progress = 5;
   repeated UpdateContainerRequestProto update_requests = 7;
+  repeated SchedulingRequestProto scheduling_requests = 10;
 }
 
 message NMTokenProto {
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/AllocateRequestPBImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/AllocateRequestPBImpl.java
index 0f0f5710332..b460044bb7f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/AllocateRequestPBImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/AllocateRequestPBImpl.java
@@ -29,14 +29,17 @@ import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ResourceBlacklistRequest;
 import org.apache.hadoop.yarn.api.records.ResourceRequest;
+import org.apache.hadoop.yarn.api.records.SchedulingRequest;
 import org.apache.hadoop.yarn.api.records.UpdateContainerRequest;
 import org.apache.hadoop.yarn.api.records.impl.pb.ContainerIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourceBlacklistRequestPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourceRequestPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.SchedulingRequestPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.UpdateContainerRequestPBImpl;
 import org.apache.hadoop.yarn.proto.YarnProtos.ContainerIdProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceBlacklistRequestProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceRequestProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.SchedulingRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.UpdateContainerRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.AllocateRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.AllocateRequestProtoOrBuilder;
@@ -53,6 +56,7 @@ public class AllocateRequestPBImpl extends AllocateRequest {
   private List<ResourceRequest> ask = null;
   private List<ContainerId> release = null;
   private List<UpdateContainerRequest> updateRequests = null;
+  private List<SchedulingRequest> schedulingRequests = null;
   private ResourceBlacklistRequest blacklistRequest = null;
   
   public AllocateRequestPBImpl() {
@@ -101,6 +105,9 @@ public class AllocateRequestPBImpl extends AllocateRequest {
     if (this.updateRequests != null) {
       addUpdateRequestsToProto();
     }
+    if (this.schedulingRequests != null) {
+      addSchedulingRequestsToProto();
+    }
     if (this.blacklistRequest != null) {
       builder.setBlacklistRequest(convertToProtoFormat(this.blacklistRequest));
     }
@@ -177,6 +184,23 @@ public class AllocateRequestPBImpl extends AllocateRequest {
     this.updateRequests.addAll(updateRequests);
   }
 
+  @Override
+  public List<SchedulingRequest> getSchedulingRequests() {
+    initSchedulingRequests();
+    return this.schedulingRequests;
+  }
+
+  @Override
+  public void setSchedulingRequests(
+      List<SchedulingRequest> schedulingRequests) {
+    if (schedulingRequests == null) {
+      return;
+    }
+    initSchedulingRequests();
+    this.schedulingRequests.clear();
+    this.schedulingRequests.addAll(schedulingRequests);
+  }
+
   @Override
   public ResourceBlacklistRequest getResourceBlacklistRequest() {
     AllocateRequestProtoOrBuilder p = viaProto ? proto : builder;
@@ -261,6 +285,20 @@ public class AllocateRequestPBImpl extends AllocateRequest {
     }
   }
 
+  private void initSchedulingRequests() {
+    if (this.schedulingRequests != null) {
+      return;
+    }
+    AllocateRequestProtoOrBuilder p = viaProto ? proto : builder;
+    List<SchedulingRequestProto> list =
+        p.getSchedulingRequestsList();
+    this.schedulingRequests = new ArrayList<>();
+
+    for (SchedulingRequestProto c : list) {
+      this.schedulingRequests.add(convertFromProtoFormat(c));
+    }
+  }
+
   private void addUpdateRequestsToProto() {
     maybeInitBuilder();
     builder.clearUpdateRequests();
@@ -297,6 +335,41 @@ public class AllocateRequestPBImpl extends AllocateRequest {
     builder.addAllUpdateRequests(iterable);
   }
 
+  private void addSchedulingRequestsToProto() {
+    maybeInitBuilder();
+    builder.clearSchedulingRequests();
+    if (schedulingRequests == null) {
+      return;
+    }
+    Iterable<SchedulingRequestProto> iterable =
+        new Iterable<SchedulingRequestProto>() {
+          @Override
+          public Iterator<SchedulingRequestProto> iterator() {
+            return new Iterator<SchedulingRequestProto>() {
+
+              private Iterator<SchedulingRequest> iter =
+                  schedulingRequests.iterator();
+
+              @Override
+              public boolean hasNext() {
+                return iter.hasNext();
+              }
+
+              @Override
+              public SchedulingRequestProto next() {
+                return convertToProtoFormat(iter.next());
+              }
+
+              @Override
+              public void remove() {
+                throw new UnsupportedOperationException();
+              }
+            };
+
+          }
+        };
+    builder.addAllSchedulingRequests(iterable);
+  }
   @Override
   public List<ContainerId> getReleaseList() {
     initReleases();
@@ -377,6 +450,16 @@ public class AllocateRequestPBImpl extends AllocateRequest {
     return ((UpdateContainerRequestPBImpl) t).getProto();
   }
 
+  private SchedulingRequestPBImpl convertFromProtoFormat(
+      SchedulingRequestProto p) {
+    return new SchedulingRequestPBImpl(p);
+  }
+
+  private SchedulingRequestProto convertToProtoFormat(
+      SchedulingRequest t) {
+    return ((SchedulingRequestPBImpl) t).getProto();
+  }
+
   private ContainerIdPBImpl convertFromProtoFormat(ContainerIdProto p) {
     return new ContainerIdPBImpl(p);
   }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceSizingPBImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceSizingPBImpl.java
index 05bb3bd8551..f98e488031b 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceSizingPBImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceSizingPBImpl.java
@@ -112,6 +112,6 @@ public class ResourceSizingPBImpl extends ResourceSizing {
   }
 
   private ResourceProto convertToProtoFormat(Resource r) {
-    return ((ResourcePBImpl) r).getProto();
+    return ProtoUtils.convertToProtoFormat(r);
   }
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/SchedulingRequestPBImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/SchedulingRequestPBImpl.java
index 7826b369273..305856a95d0 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/SchedulingRequestPBImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/SchedulingRequestPBImpl.java
@@ -263,4 +263,20 @@ public class SchedulingRequestPBImpl extends SchedulingRequest {
     this.allocationTags = new HashSet<>();
     this.allocationTags.addAll(p.getAllocationTagsList());
   }
+
+  @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;
+  }
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestPBImplRecords.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestPBImplRecords.java
index c5585c28b21..a0b907dae1f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestPBImplRecords.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestPBImplRecords.java
@@ -149,8 +149,10 @@ import org.apache.hadoop.yarn.api.records.ResourceInformation;
 import org.apache.hadoop.yarn.api.records.ResourceBlacklistRequest;
 import org.apache.hadoop.yarn.api.records.ResourceOption;
 import org.apache.hadoop.yarn.api.records.ResourceRequest;
+import org.apache.hadoop.yarn.api.records.ResourceSizing;
 import org.apache.hadoop.yarn.api.records.ResourceTypeInfo;
 import org.apache.hadoop.yarn.api.records.ResourceUtilization;
+import org.apache.hadoop.yarn.api.records.SchedulingRequest;
 import org.apache.hadoop.yarn.api.records.SerializedException;
 import org.apache.hadoop.yarn.api.records.StrictPreemptionContract;
 import org.apache.hadoop.yarn.api.records.Token;
@@ -189,7 +191,9 @@ import org.apache.hadoop.yarn.api.records.impl.pb.ResourceBlacklistRequestPBImpl
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourceOptionPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourceRequestPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ResourceSizingPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourceTypeInfoPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.SchedulingRequestPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.SerializedExceptionPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.StrictPreemptionContractPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.TokenPBImpl;
@@ -225,6 +229,8 @@ import org.apache.hadoop.yarn.proto.YarnProtos.ResourceBlacklistRequestProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceOptionProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceRequestProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.ResourceSizingProto;
+import org.apache.hadoop.yarn.proto.YarnProtos.SchedulingRequestProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.SerializedExceptionProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.StrictPreemptionContractProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.URLProto;
@@ -428,6 +434,8 @@ public class TestPBImplRecords extends BasePBImplRecordsTest {
     generateByNewInstance(QueueConfigurations.class);
     generateByNewInstance(CollectorInfo.class);
     generateByNewInstance(ResourceTypeInfo.class);
+    generateByNewInstance(ResourceSizing.class);
+    generateByNewInstance(SchedulingRequest.class);
   }
 
   @Test
@@ -906,6 +914,17 @@ public class TestPBImplRecords extends BasePBImplRecordsTest {
     validatePBImplRecord(ResourceRequestPBImpl.class, ResourceRequestProto.class);
   }
 
+  @Test
+  public void testResourceSizingPBImpl() throws Exception {
+    validatePBImplRecord(ResourceSizingPBImpl.class, ResourceSizingProto.class);
+  }
+
+  @Test
+  public void testSchedulingRequestPBImpl() throws Exception {
+    validatePBImplRecord(SchedulingRequestPBImpl.class,
+        SchedulingRequestProto.class);
+  }
+
   @Test
   public void testSerializedExceptionPBImpl() throws Exception {
     validatePBImplRecord(SerializedExceptionPBImpl.class,