compile fix

Author: clarax

hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/CostFromRegionLoadFunction.java

@@ -70,11 +70,6 @@ protected final double cost() {
     return cost.cost();
   }
 
-  @Override
-  protected final void updateWeight(double[] weights) {
-    weights[StochasticLoadBalancer.GeneratorType.RANDOM.ordinal()] += cost.cost();
-  }
-
   protected double getRegionLoadCost(Collection<BalancerRegionLoad> regionLoadList) {
     double cost = 0;
     for (BalancerRegionLoad rl : regionLoadList) {

hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/CostFunction.java

@@ -83,7 +83,9 @@ protected void regionMoved(int region, int oldServer, int newServer) {
 
   protected abstract double cost();
 
-  protected abstract void updateWeight(double[] weights);
+  protected void updateWeight(double[] weights) {
+    weights[StochasticLoadBalancer.GeneratorType.RANDOM.ordinal()] += cost();
+  }
 
   /**
    * Scale the value between 0 and 1.

hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionCountSkewCostFunction.java

@@ -75,6 +75,6 @@ protected void regionMoved(int region, int oldServer, int newServer) {
 
   @Override
   protected final void updateWeight(double[] weights) {
-    weights[StochasticLoadBalancer.GeneratorType.LOAD.ordinal()] += cost.cost();
+    weights[StochasticLoadBalancer.GeneratorType.LOAD.ordinal()] += cost();
   }
 }