svn merge -c 1236901 from trunk for MAPREDUCE-3740.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23-PB@1237550 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -18,6 +18,9 @@ Release 0.23-PB - Unreleased
     Move the support for multiple protocols to lower layer so that Writable,
     PB and Avro can all use it (Sanjay)
 
+    MAPREDUCE-3740. Fixed broken mapreduce compilation after the patch for
+    HADOOP-7965. (Devaraj K via vinodkv) 
+
 Release 0.23.1 - Unreleased
 
   NEW FEATURES                                                                    

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/ProtoOverHadoopRpcEngine.java

@@ -36,10 +36,12 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.ipc.Client;
+import org.apache.hadoop.ipc.ProtocolMetaInfoPB;
 import org.apache.hadoop.ipc.ProtocolProxy;
 import org.apache.hadoop.ipc.RPC;
 import org.apache.hadoop.ipc.RpcEngine;
 import org.apache.hadoop.ipc.ClientCache;
+import org.apache.hadoop.ipc.Client.ConnectionId;
 import org.apache.hadoop.ipc.RpcPayloadHeader.RpcKind;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.SecretManager;
@@ -73,6 +75,17 @@ public class ProtoOverHadoopRpcEngine implements RpcEngine {
         addr, ticket, conf, factory, rpcTimeout)), false);
   }
 
+  @Override
+  public ProtocolProxy<ProtocolMetaInfoPB> getProtocolMetaInfoProxy(
+      ConnectionId connId, Configuration conf, SocketFactory factory)
+      throws IOException {
+    Class<ProtocolMetaInfoPB> protocol = ProtocolMetaInfoPB.class;
+    return new ProtocolProxy<ProtocolMetaInfoPB>(protocol,
+        (ProtocolMetaInfoPB) Proxy.newProxyInstance(protocol.getClassLoader(),
+            new Class[] { protocol }, new Invoker(protocol, connId, conf,
+                factory)), false);
+  }
+  
   private static class Invoker implements InvocationHandler, Closeable {
     private Map<String, Message> returnTypes = new ConcurrentHashMap<String, Message>();
     private boolean isClosed = false;
@@ -82,8 +95,13 @@ public class ProtoOverHadoopRpcEngine implements RpcEngine {
     public Invoker(Class<?> protocol, InetSocketAddress addr,
         UserGroupInformation ticket, Configuration conf, SocketFactory factory,
         int rpcTimeout) throws IOException {
-      this.remoteId = Client.ConnectionId.getConnectionId(addr, protocol,
-          ticket, rpcTimeout, conf);
+      this(protocol, Client.ConnectionId.getConnectionId(addr, protocol,
+          ticket, rpcTimeout, conf), conf, factory);
+    }
+    
+    public Invoker(Class<?> protocol, Client.ConnectionId connId,
+        Configuration conf, SocketFactory factory) {
+      this.remoteId = connId;
       this.client = CLIENTS.getClient(conf, factory,
           ProtoSpecificResponseWritable.class);
     }