Fixed compilation error.

README.md

@@ -9,27 +9,27 @@ MPI programs running on Hadoop YARN clusters.
 
 As a prerequisite, you need to
 
-1. have a running Hadoop Yarn and HDFS cluster
-2. have mpich-3.1.2 deploy to every node of the cluster, and the
-binary folder should be in PATH.
-3. correctly configure MPICH-yarn.
+1. The cluster has been deployed Hadoop YARN and HDFS.
+2. Each node in the cluster has installed mpich-3.1.2 and its ./bin
+folder has been added to PATH.
 
 This version of mpich-yarn uses MPICH-3.1.2 as implementation of MPI
 and uses ssh as communication daemon.
 
 ##Recommended Configuation
 
-Ubuntu 12.04 LTS
-gcc 4.6.3
-jdk 1.7.0_25
-Apache Maven 3.2.3
+1. Ubuntu 12.04 LTS
+2. hadoop 2.4.1
+3. gcc 4.6.3
+4. jdk 1.7.0_25
+5. Apache Maven 3.2.3
 
 #Compile
 
 To compile MPICH-yarn, first you need to have maven installed. Then 
 type command at source folder:
 
-	mvn clean package
+	mvn clean package -Dmaven.test.skip=true
 
 You need to ensure Internet connected as maven needs to download plugins
 on the maven repository, this may take minutes.
@@ -40,8 +40,10 @@ MPI programs.
 
 #Configuation
 
-There are many tutorials on the Internet about configuring Hadoop, here
-is a sample configuration that has successfully run in our cluster.
+There are many tutorials on the Internet about configuring Hadoop. However,
+there are many troubles in configuring YARN to make it work well with mpich2-
+yarn. To save your time, here is a sample configuration that has successfully
+run in our cluster for your reference.
 
 yarn-site.xml
 

pom.xml

@@ -60,6 +60,16 @@
 					</archive>
 				</configuration>
 			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.0.2</version>
+				<configuration>
+				  <source>1.7</source>
+				  <target>1.7</target>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 

src/main/java/org/apache/hadoop/yarn/mpi/server/handler/MPIAMRMAsyncHandler.java

@@ -16,10 +16,6 @@
 import org.apache.hadoop.yarn.api.records.NodeReport;
 import org.apache.hadoop.yarn.client.api.async.AMRMClientAsync.CallbackHandler;
 
-/**
- * @author ÓᲩÎÄ
- *
- */
 public class MPIAMRMAsyncHandler implements CallbackHandler {
   private static final Log LOG = LogFactory.getLog(MPIAMRMAsyncHandler.class);
   private final Map<String, Integer> hostToProcNum = new HashMap<String, Integer>();

src/main/java/org/apache/hadoop/yarn/mpi/server/handler/MPINMAsyncHandler.java

@@ -13,10 +13,6 @@
 import org.apache.hadoop.yarn.api.records.ContainerStatus;
 import org.apache.hadoop.yarn.client.api.async.NMClientAsync.CallbackHandler;
 
-/**
- * @author ÓᲩÎÄ
- *
- */
 public class MPINMAsyncHandler implements CallbackHandler {
   private static final Log LOG = LogFactory
       .getLog(MPINMAsyncHandler.class);