diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AOrderedListSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AOrderedListSerializerDeserializer.java
index c68f82a..d37a4ea 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AOrderedListSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AOrderedListSerializerDeserializer.java
@@ -26,9 +26,9 @@
     public static final AOrderedListSerializerDeserializer SCHEMALESS_INSTANCE = new AOrderedListSerializerDeserializer();
 
     private IAType itemType;
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("rawtypes")
     private ISerializerDeserializer serializer;
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("rawtypes")
     private ISerializerDeserializer deserializer;
     private AOrderedListType orderedlistType;
 
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
index d4d4fb6..5492c5c 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
@@ -48,7 +48,7 @@
     private AqlSerializerDeserializerProvider() {
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("rawtypes")
     @Override
     public ISerializerDeserializer getSerializerDeserializer(Object typeInfo) {
         IAType aqlType = (IAType) typeInfo;
@@ -63,7 +63,7 @@
         }
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("rawtypes")
     public ISerializerDeserializer getNonTaggedSerializerDeserializer(IAType aqlType) {
         switch (aqlType.getTypeTag()) {
             case CIRCLE: {
@@ -139,7 +139,7 @@
         }
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("rawtypes")
     private ISerializerDeserializer addTag(final ISerializerDeserializer nonTaggedSerde, final ATypeTag typeTag) {
         return new ISerializerDeserializer<IAObject>() {
 
@@ -148,13 +148,15 @@
             @Override
             public IAObject deserialize(DataInput in) throws HyracksDataException {
                 try {
-                    ATypeTag typeTag = SerializerDeserializerUtil.deserializeTag(in);
+                    //deserialize the tag to move the  input cursor forward 
+                    SerializerDeserializerUtil.deserializeTag(in);
                 } catch (IOException e) {
                     throw new HyracksDataException(e);
                 }
                 return (IAObject) nonTaggedSerde.deserialize(in);
             }
 
+            @SuppressWarnings("unchecked")
             @Override
             public void serialize(IAObject instance, DataOutput out) throws HyracksDataException {
                 SerializerDeserializerUtil.serializeTag(instance, out);
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
index eac6602..17117be 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
@@ -54,6 +54,7 @@
 }
 
 class TypeTrait implements ITypeTraits {
+    private static final long serialVersionUID = 1L;
 
     @Override
     public boolean isFixedLength() {