diff --git a/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/AbstractProfile.java b/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/AbstractProfile.java
index 74d6000..b4e3619 100644
--- a/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/AbstractProfile.java
+++ b/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/AbstractProfile.java
@@ -18,6 +18,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
+import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -37,12 +38,14 @@
     public abstract JSONObject toJSON() throws JSONException;
 
     protected void populateCounters(JSONObject jo) throws JSONException {
+        JSONArray countersObj = new JSONArray();
         for (Map.Entry<String, Long> e : counters.entrySet()) {
             JSONObject jpe = new JSONObject();
             jpe.put("name", e.getKey());
             jpe.put("value", e.getValue());
-            jo.accumulate("counters", jpe);
+            countersObj.put(jpe);
         }
+        jo.put("counters", countersObj);
     }
 
     protected void merge(AbstractProfile profile) {
diff --git a/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/JobletProfile.java b/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/JobletProfile.java
index 5069fc3..78f885d 100644
--- a/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/JobletProfile.java
+++ b/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/om/JobletProfile.java
@@ -17,6 +17,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
+import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -49,9 +50,11 @@
         json.put("type", "joblet-profile");
         json.put("node-id", nodeId.toString());
         populateCounters(json);
+        JSONArray tasks = new JSONArray();
         for (TaskProfile p : taskProfiles.values()) {
-            json.accumulate("tasks", p.toJSON());
+            tasks.put(p.toJSON());
         }
+        json.put("tasks", tasks);
 
         return json;
     }