diff -urN hadoop-2.6.0-src.orig/hadoop-project/pom.xml hadoop-2.6.0-src/hadoop-project/pom.xml
--- hadoop-2.6.0-src.orig/hadoop-project/pom.xml	2015-10-30 11:10:36.800000000 +0000
+++ hadoop-2.6.0-src/hadoop-project/pom.xml	2015-10-30 11:12:31.410000000 +0000
@@ -67,7 +67,7 @@
 
     <!-- ProtocolBuffer version, used to verify the protoc version and -->
     <!-- define the protobuf JAR version                               -->
-    <protobuf.version>2.5.0</protobuf.version>
+    <protobuf.version>2.6.1</protobuf.version>
     <protoc.path>${env.HADOOP_PROTOC_PATH}</protoc.path>
 
     <zookeeper.version>3.4.6</zookeeper.version>