diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java
index 8add260..4829173 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java
@@ -26,10 +26,11 @@
 
     @Override
     public boolean allocate(long memory) {
-        if (this.memory.addAndGet(-memory) < 0) {
-            this.memory.addAndGet(memory);
-            return false;
-        }
+        // commented as now the deallocation is not implemented yet.
+        //        if (this.memory.addAndGet(-memory) < 0) {
+        //            this.memory.addAndGet(memory);
+        //            return false;
+        //        }
         return true;
     }