diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index e8a590e15c4..49e4c0ed0b3 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -195,6 +195,9 @@ Release 2.0.3-alpha - Unreleased
     applications that YARN's ResourceManager doesn't keep track off anymore
     (Derek Dagit via vinodkv)
 
+    MAPREDUCE-4920. Use security token protobuf definition from hadoop common.
+    (Suresh Srinivas via vinodkv)
+
   OPTIMIZATIONS
 
   BUG FIXES
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/pom.xml b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/pom.xml
index 6b22094bcb7..8d70122818c 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/pom.xml
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/pom.xml
@@ -81,6 +81,7 @@
             <configuration>
               <executable>protoc</executable>
               <arguments>
+                <argument>-I../../../hadoop-common-project/hadoop-common/src/main/proto/</argument>
                 <argument>-I../../../hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/</argument>
                 <argument>-Isrc/main/proto/</argument>
                 <argument>--java_out=target/generated-sources/proto</argument>
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/CancelDelegationTokenRequestPBImpl.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/CancelDelegationTokenRequestPBImpl.java
index e9e196bbbf0..68ffcccf28f 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/CancelDelegationTokenRequestPBImpl.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/CancelDelegationTokenRequestPBImpl.java
@@ -20,10 +20,10 @@
 import org.apache.hadoop.mapreduce.v2.api.protocolrecords.CancelDelegationTokenRequest;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.CancelDelegationTokenRequestProto;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.CancelDelegationTokenRequestProtoOrBuilder;
+import org.apache.hadoop.security.proto.SecurityProtos.TokenProto;
 import org.apache.hadoop.yarn.api.records.DelegationToken;
 import org.apache.hadoop.yarn.api.records.ProtoBase;
 import org.apache.hadoop.yarn.api.records.impl.pb.DelegationTokenPBImpl;
-import org.apache.hadoop.yarn.proto.YarnProtos.DelegationTokenProto;
 
 public class CancelDelegationTokenRequestPBImpl extends
     ProtoBase<CancelDelegationTokenRequestProto> implements
@@ -98,11 +98,11 @@ private void maybeInitBuilder() {
   }
 
 
-  private DelegationTokenPBImpl convertFromProtoFormat(DelegationTokenProto p) {
+  private DelegationTokenPBImpl convertFromProtoFormat(TokenProto p) {
     return new DelegationTokenPBImpl(p);
   }
 
-  private DelegationTokenProto convertToProtoFormat(DelegationToken t) {
+  private TokenProto convertToProtoFormat(DelegationToken t) {
     return ((DelegationTokenPBImpl)t).getProto();
   }
 }
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/GetDelegationTokenResponsePBImpl.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/GetDelegationTokenResponsePBImpl.java
index 33eecc84cec..59675225734 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/GetDelegationTokenResponsePBImpl.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/GetDelegationTokenResponsePBImpl.java
@@ -20,10 +20,10 @@
 import org.apache.hadoop.mapreduce.v2.api.protocolrecords.GetDelegationTokenResponse;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.GetDelegationTokenResponseProto;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.GetDelegationTokenResponseProtoOrBuilder;
+import org.apache.hadoop.security.proto.SecurityProtos.TokenProto;
 import org.apache.hadoop.yarn.api.records.DelegationToken;
 import org.apache.hadoop.yarn.api.records.ProtoBase;
 import org.apache.hadoop.yarn.api.records.impl.pb.DelegationTokenPBImpl;
-import org.apache.hadoop.yarn.proto.YarnProtos.DelegationTokenProto;
 
 
 public class GetDelegationTokenResponsePBImpl extends
@@ -99,11 +99,11 @@ private void maybeInitBuilder() {
   }
    
 
-  private DelegationTokenPBImpl convertFromProtoFormat(DelegationTokenProto p) {
+  private DelegationTokenPBImpl convertFromProtoFormat(TokenProto p) {
     return new DelegationTokenPBImpl(p);
   }
 
-  private DelegationTokenProto convertToProtoFormat(DelegationToken t) {
+  private TokenProto convertToProtoFormat(DelegationToken t) {
     return ((DelegationTokenPBImpl)t).getProto();
   }
 }
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/RenewDelegationTokenRequestPBImpl.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/RenewDelegationTokenRequestPBImpl.java
index 26777c6b1e6..7d9017d9356 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/RenewDelegationTokenRequestPBImpl.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/protocolrecords/impl/pb/RenewDelegationTokenRequestPBImpl.java
@@ -20,10 +20,10 @@
 import org.apache.hadoop.mapreduce.v2.api.protocolrecords.RenewDelegationTokenRequest;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.RenewDelegationTokenRequestProto;
 import org.apache.hadoop.mapreduce.v2.proto.MRServiceProtos.RenewDelegationTokenRequestProtoOrBuilder;
+import org.apache.hadoop.security.proto.SecurityProtos.TokenProto;
 import org.apache.hadoop.yarn.api.records.DelegationToken;
 import org.apache.hadoop.yarn.api.records.ProtoBase;
 import org.apache.hadoop.yarn.api.records.impl.pb.DelegationTokenPBImpl;
-import org.apache.hadoop.yarn.proto.YarnProtos.DelegationTokenProto;
 
 public class RenewDelegationTokenRequestPBImpl extends
     ProtoBase<RenewDelegationTokenRequestProto> implements
@@ -96,11 +96,11 @@ private void maybeInitBuilder() {
     viaProto = false;
   }
 
-  private DelegationTokenPBImpl convertFromProtoFormat(DelegationTokenProto p) {
+  private DelegationTokenPBImpl convertFromProtoFormat(TokenProto p) {
     return new DelegationTokenPBImpl(p);
   }
 
-  private DelegationTokenProto convertToProtoFormat(DelegationToken t) {
+  private TokenProto convertToProtoFormat(DelegationToken t) {
     return ((DelegationTokenPBImpl) t).getProto();
   }
 }
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/proto/mr_service_protos.proto b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/proto/mr_service_protos.proto
index f875fcb26bf..12c05209f3d 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/proto/mr_service_protos.proto
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/proto/mr_service_protos.proto
@@ -21,6 +21,7 @@ option java_outer_classname = "MRServiceProtos";
 option java_generic_services = true;
 option java_generate_equals_and_hash = true;
 
+import "Security.proto";
 import "mr_protos.proto";
 import "yarn_protos.proto";
 
@@ -81,7 +82,7 @@ message GetDelegationTokenRequestProto {
 }
 
 message GetDelegationTokenResponseProto {
-  optional DelegationTokenProto m_r_delegation_token = 1;
+  optional hadoop.common.TokenProto m_r_delegation_token = 1;
 }
 
 message KillJobRequestProto {
@@ -109,7 +110,7 @@ message FailTaskAttemptResponseProto {
 }
 
 message RenewDelegationTokenRequestProto {
-  required DelegationTokenProto delegation_token = 1;
+  required hadoop.common.TokenProto delegation_token = 1;
 }
 
 message RenewDelegationTokenResponseProto {
@@ -117,7 +118,7 @@ message RenewDelegationTokenResponseProto {
 }
 
 message CancelDelegationTokenRequestProto {
-  required DelegationTokenProto delegation_token = 1;
+  required hadoop.common.TokenProto delegation_token = 1;
 }
 
 message CancelDelegationTokenResponseProto {