lower the hearbeat setting for tests
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
index 98be8cd..aabd4ba 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
@@ -61,7 +61,7 @@
         ccConfig.defaultMaxJobAttempts = 0;
         ccConfig.jobHistorySize = 1;
         ccConfig.profileDumpPeriod = -1;
-        ccConfig.heartbeatPeriod = 1000;
+        ccConfig.heartbeatPeriod = 50;
         ccConfig.maxHeartbeatLapsePeriods = 15;
 
         // cluster controller
@@ -101,7 +101,7 @@
     public static void startNC1() throws Exception {
         nc1.start();
     }
-    
+
     public static void shutdownNC1() throws Exception {
         nc1.stop();
     }