diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ReservationDefinition.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ReservationDefinition.java
index 8ef881bbea9..bb9bca28a2a 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ReservationDefinition.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ReservationDefinition.java
@@ -19,7 +19,6 @@
 package org.apache.hadoop.yarn.api.records;
 
 import org.apache.hadoop.classification.InterfaceAudience.Public;
-import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.util.Records;
 
@@ -38,7 +37,7 @@ public abstract class ReservationDefinition {
   @Unstable
   public static ReservationDefinition newInstance(long arrival, long deadline,
       ReservationRequests reservationRequests, String name,
-      String recurrenceExpression) {
+      String recurrenceExpression, Priority priority) {
     ReservationDefinition rDefinition =
         Records.newRecord(ReservationDefinition.class);
     rDefinition.setArrival(arrival);
@@ -46,6 +45,7 @@ public abstract class ReservationDefinition {
     rDefinition.setReservationRequests(reservationRequests);
     rDefinition.setReservationName(name);
     rDefinition.setRecurrenceExpression(recurrenceExpression);
+    rDefinition.setPriority(priority);
     return rDefinition;
   }
 
@@ -53,8 +53,8 @@ public abstract class ReservationDefinition {
   @Unstable
   public static ReservationDefinition newInstance(long arrival, long deadline,
       ReservationRequests reservationRequests, String name) {
-    ReservationDefinition rDefinition =
-        newInstance(arrival, deadline, reservationRequests, name, "0");
+    ReservationDefinition rDefinition = newInstance(arrival, deadline,
+        reservationRequests, name, "0", Priority.UNDEFINED);
     return rDefinition;
   }
 
@@ -130,7 +130,7 @@ public abstract class ReservationDefinition {
    *         allocation in the scheduler
    */
   @Public
-  @Evolving
+  @Unstable
   public abstract String getReservationName();
 
   /**
@@ -142,7 +142,7 @@ public abstract class ReservationDefinition {
    *          allocation in the scheduler
    */
   @Public
-  @Evolving
+  @Unstable
   public abstract void setReservationName(String name);
 
   /**
@@ -160,7 +160,7 @@ public abstract class ReservationDefinition {
    * @return recurrence of this reservation
    */
   @Public
-  @Evolving
+  @Unstable
   public abstract String getRecurrenceExpression();
 
   /**
@@ -178,7 +178,35 @@ public abstract class ReservationDefinition {
    * @param recurrenceExpression recurrence interval of this reservation
    */
   @Public
-  @Evolving
+  @Unstable
   public abstract void setRecurrenceExpression(String recurrenceExpression);
 
+  /**
+   * Get the priority for this reservation. A lower number for priority
+   * indicates a higher priority reservation. Recurring reservations are
+   * always higher priority than non-recurring reservations. Priority for
+   * non-recurring reservations are only compared with non-recurring
+   * reservations. Likewise for recurring reservations.
+   *
+   * @return int representing the priority of the reserved resource
+   *         allocation in the scheduler
+   */
+  @Public
+  @Unstable
+  public abstract Priority getPriority();
+
+  /**
+   * Set the priority for this reservation. A lower number for priority
+   * indicates a higher priority reservation. Recurring reservations are
+   * always higher priority than non-recurring reservations. Priority for
+   * non-recurring reservations are only compared with non-recurring
+   * reservations. Likewise for recurring reservations.
+   *
+   * @param priority representing the priority of the reserved resource
+   *          allocation in the scheduler
+   */
+  @Public
+  @Unstable
+  public abstract void setPriority(Priority priority);
+
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto
index f7882953fe4..9c746fde303 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto
@@ -489,6 +489,7 @@ message ReservationDefinitionProto {
   optional int64 deadline = 3;
   optional string reservation_name = 4;
   optional string recurrence_expression = 5 [default = "0"];
+  optional PriorityProto priority = 6;
 }
 
 message ResourceAllocationRequestProto {
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ReservationDefinitionPBImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ReservationDefinitionPBImpl.java
index b30cd2a2b90..49aef11976e 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ReservationDefinitionPBImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ReservationDefinitionPBImpl.java
@@ -18,8 +18,10 @@
 
 package org.apache.hadoop.yarn.api.records.impl.pb;
 
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.ReservationDefinition;
 import org.apache.hadoop.yarn.api.records.ReservationRequests;
+import org.apache.hadoop.yarn.proto.YarnProtos;
 import org.apache.hadoop.yarn.proto.YarnProtos.ReservationDefinitionProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ReservationDefinitionProtoOrBuilder;
 import org.apache.hadoop.yarn.proto.YarnProtos.ReservationRequestsProto;
@@ -32,6 +34,7 @@ public class ReservationDefinitionPBImpl extends ReservationDefinition {
   boolean viaProto = false;
 
   private ReservationRequests reservationReqs;
+  private Priority priority = null;
 
   public ReservationDefinitionPBImpl() {
     builder = ReservationDefinitionProto.newBuilder();
@@ -150,6 +153,33 @@ public class ReservationDefinitionPBImpl extends ReservationDefinition {
     builder.setReservationName(name);
   }
 
+  @Override
+  public Priority getPriority() {
+    ReservationDefinitionProtoOrBuilder p = viaProto ? proto : builder;
+    if (this.priority != null) {
+      return this.priority;
+    }
+    if (!p.hasPriority()) {
+      return Priority.UNDEFINED;
+    }
+    this.priority = convertFromProtoFormat(p.getPriority());
+    return this.priority;
+  }
+
+  @Override
+  public void setPriority(Priority priority) {
+    maybeInitBuilder();
+    if (priority == null) {
+      this.priority = Priority.UNDEFINED;
+    }
+    this.priority = priority;
+  }
+
+  private PriorityPBImpl convertFromProtoFormat(
+      YarnProtos.PriorityProto p) {
+    return new PriorityPBImpl(p);
+  }
+
   private ReservationRequestsPBImpl convertFromProtoFormat(
       ReservationRequestsProto p) {
     return new ReservationRequestsPBImpl(p);
@@ -164,6 +194,7 @@ public class ReservationDefinitionPBImpl extends ReservationDefinition {
     return "{Arrival: " + getArrival() + ", Deadline: " + getDeadline()
         + ", Reservation Name: " + getReservationName()
         + ", Recurrence expression: " + getRecurrenceExpression()
+        + ", Priority: " + getPriority().toString()
         + ", Resources: " + getReservationRequests() + "}";
   }
 
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ReservationDefinitionInfo.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ReservationDefinitionInfo.java
index 71ee924e3d3..42a07af6564 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ReservationDefinitionInfo.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ReservationDefinitionInfo.java
@@ -44,6 +44,9 @@ public class ReservationDefinitionInfo {
   @XmlElement(name = "reservation-name")
   private String reservationName;
 
+  @XmlElement(name = "priority")
+  private int priority;
+
   public ReservationDefinitionInfo() {
 
   }
@@ -89,4 +92,12 @@ public class ReservationDefinitionInfo {
     this.reservationName = reservationName;
   }
 
+  public int getPriority() {
+    return priority;
+  }
+
+  public void setPriority(int priority) {
+    this.priority = priority;
+  }
+
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/ReservationSystemTestUtil.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/ReservationSystemTestUtil.java
index 24c386a7170..1ff6a1a8185 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/ReservationSystemTestUtil.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/ReservationSystemTestUtil.java
@@ -31,6 +31,7 @@ import java.util.TreeMap;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest;
+import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.ReservationDefinition;
 import org.apache.hadoop.yarn.api.records.ReservationId;
 import org.apache.hadoop.yarn.api.records.ReservationRequest;
@@ -199,6 +200,13 @@ public class ReservationSystemTestUtil {
   public static ReservationSubmissionRequest createSimpleReservationRequest(
       ReservationId reservationId, int numContainers, long arrival,
       long deadline, long duration) {
+    return createSimpleReservationRequest(reservationId, numContainers,
+        arrival, deadline, duration, Priority.UNDEFINED);
+  }
+
+  public static ReservationSubmissionRequest createSimpleReservationRequest(
+      ReservationId reservationId, int numContainers, long arrival,
+      long deadline, long duration, Priority priority) {
     // create a request with a single atomic ask
     ReservationRequest r =
         ReservationRequest.newInstance(Resource.newInstance(1024, 1),
@@ -208,7 +216,7 @@ public class ReservationSystemTestUtil {
             ReservationRequestInterpreter.R_ALL);
     ReservationDefinition rDef =
         ReservationDefinition.newInstance(arrival, deadline, reqs,
-            "testClientRMService#reservation");
+            "testClientRMService#reservation", "0", priority);
     ReservationSubmissionRequest request =
         ReservationSubmissionRequest.newInstance(rDef,
             reservationQ, reservationId);
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/ResourceManagerRest.md b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/ResourceManagerRest.md
index 5862506755c..051509c9b51 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/ResourceManagerRest.md
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/ResourceManagerRest.md
@@ -3237,6 +3237,7 @@ The Cluster Reservation API can be used to list reservations. When listing reser
 | deadline | long | The UTC time representation of the latest time within which this reservation can be allocated. |
 | reservation-name | string | A mnemonic name of the reservation (not a valid identifier). |
 | reservation-requests | object | A list of "stages" or phases of this reservation, each describing resource requirements and duration |
+| priority | int | An integer representing the priority of the reservation. A lower number for priority indicates a higher priority reservation. Recurring reservations are always higher priority than non-recurring reservations. Priority for non-recurring reservations are only compared with non-recurring reservations. Likewise with recurring reservations. |
 
 ### Elements of the *reservation-requests* object
 
@@ -3500,6 +3501,7 @@ Elements of the *reservation-definition* object
 | deadline | long | The UTC time representation of the latest time within which this reservation can be allocated. |
 | reservation-name | string | A mnemonic name of the reservation (not a valid identifier). |
 | reservation-requests | object | A list of "stages" or phases of this reservation, each describing resource requirements and duration |
+| priority | int | An integer representing the priority of the reservation. A lower number for priority indicates a higher priority reservation. Recurring reservations are always higher priority than non-recurring reservations. Priority for non-recurring reservations are only compared with non-recurring reservations. Likewise with recurring reservations. |
 
 Elements of the *reservation-requests* object
 
@@ -3675,6 +3677,7 @@ Elements of the *reservation-definition* object
 | deadline | long | The UTC time representation of the latest time within which this reservation can be allocated. |
 | reservation-name | string | A mnemonic name of the reservation (not a valid identifier). |
 | reservation-requests | object | A list of "stages" or phases of this reservation, each describing resource requirements and duration |
+| priority | int | An integer representing the priority of the reservation. A lower number for priority indicates a higher priority reservation. Recurring reservations are always higher priority than non-recurring reservations. Priority for non-recurring reservations are only compared with non-recurring reservations. Likewise with recurring reservations. |
 
 Elements of the *reservation-requests* object