HBASE-24894 [Flakey Test] TestStochasticLoadBalancer.testMoveCostMult…

…iplier

Closes #2270

Signed-off-by: Viraj Jasani <vjasani@apache.org>

hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer.java

@@ -32,6 +32,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Queue;
+import java.util.TimeZone;
 import java.util.TreeMap;
 
 import org.apache.commons.logging.Log;
@@ -53,7 +54,9 @@
 import org.apache.hadoop.hbase.testclassification.FlakeyTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.EnvironmentEdge;
 import org.junit.Ignore;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
@@ -237,9 +240,19 @@ public void testMoveCostMultiplier() throws Exception {
     assertEquals(StochasticLoadBalancer.MoveCostFunction.DEFAULT_MOVE_COST,
       costFunction.getMultiplier(), 0.01);
 
-    //In offpeak hours, the multiplier of move cost should be lower
+    // In offpeak hours, the multiplier of move cost should be lower
     conf.setInt("hbase.offpeak.start.hour",0);
     conf.setInt("hbase.offpeak.end.hour",23);
+    // Set a fixed time which hour is 15, so it will always in offpeak
+    // See HBASE-24898 for more info of the calculation here
+    long deltaFor15 = TimeZone.getDefault().getRawOffset() - 28800000;
+    final long timeFor15 = 1597907081000L - deltaFor15;
+    EnvironmentEdgeManager.injectEdge(new EnvironmentEdge() {
+      @Override
+      public long currentTime() {
+        return timeFor15;
+      }
+    });
     costFunction = new StochasticLoadBalancer.MoveCostFunction(conf);
     costFunction.init(cluster);
     costFunction.cost();