merge -c 1459054 from trunk to branch-2 to fix YARN-297. Improve hashCode implementations for PB records. Contributed by Xuan Gong.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1459055 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -30,6 +30,9 @@ Release 2.0.5-beta - UNRELEASED
     YARN-481. Add AM Host and RPC Port to ApplicationCLI Status Output 
     (Chris Riccomini via bikas)
 
+    YARN-297. Improve hashCode implementations for PB records. (Xuan Gong via
+    hitesh)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ApplicationAttemptId.java

@@ -76,8 +76,8 @@ public abstract class ApplicationAttemptId implements
   @Override
   public int hashCode() {
     // Generated by eclipse.
-    final int prime = 31;
-    int result = 1;
+    final int prime = 347671;
+    int result = 5501;
     ApplicationId appId = getApplicationId();
     result = prime * result +  appId.hashCode();
     result = prime * result + getAttemptId();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ApplicationId.java

@@ -97,8 +97,8 @@ public abstract class ApplicationId implements Comparable<ApplicationId> {
   @Override
   public int hashCode() {
     // Generated by eclipse.
-    final int prime = 31;
-    int result = 1;
+    final int prime = 371237;
+    int result = 6521;
     long clusterTimestamp = getClusterTimestamp();
     result = prime * result
         + (int) (clusterTimestamp ^ (clusterTimestamp >>> 32));

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ContainerId.java

@@ -86,8 +86,8 @@ public abstract class ContainerId implements Comparable<ContainerId>{
   @Override
   public int hashCode() {
     // Generated by eclipse.
-    final int prime = 31;
-    int result = 1;
+    final int prime = 435569;
+    int result = 7507;
     result = prime * result + getId();
     result = prime * result + getApplicationAttemptId().hashCode();
     return result;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/NodeId.java

@@ -65,8 +65,8 @@ public abstract class NodeId implements Comparable<NodeId> {
 
   @Override
   public int hashCode() {
-    final int prime = 31;
-    int result = 1;
+    final int prime = 493217;
+    int result = 8501;
     result = prime * result + this.getHost().hashCode();
     result = prime * result + this.getPort();
     return result;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/Priority.java

@@ -39,8 +39,8 @@ public abstract class Priority implements Comparable<Priority> {
   
   @Override
   public int hashCode() {
-    final int prime = 31;
-    int result = 1;
+    final int prime = 517861;
+    int result = 9511;
     result = prime * result + getPriority();
     return result;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java

@@ -124,8 +124,8 @@ public abstract class ResourceRequest implements Comparable<ResourceRequest> {
 
   @Override
   public int hashCode() {
-    final int prime = 31;
-    int result = 1;
+    final int prime = 2153;
+    int result = 2459;
     Resource capability = getCapability();
     String hostName = getHostName();
     Priority priority = getPriority();