diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdate.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdate.java
index 812a034..0673b79 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdate.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdate.java
@@ -85,7 +85,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(rows);
+        return rows.hashCode();
     }
 
     @Override
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdates.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdates.java
index 8938bee..e161016 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdates.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/message/TableUpdates.java
@@ -67,7 +67,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(result);
+        return result.hashCode();
     }
 
     @Override
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbMap.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbMap.java
index fce3f69..a62ab0d 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbMap.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbMap.java
@@ -61,7 +61,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(map);
+        return map.hashCode();
     }
 
     @Override
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbSet.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbSet.java
index fa5abe8..21f0b72 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbSet.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/OvsdbSet.java
@@ -63,7 +63,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(set);
+        return set.hashCode();
     }
 
     @Override
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/UUID.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/UUID.java
index 463b75d..0177eea 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/UUID.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/notation/UUID.java
@@ -62,7 +62,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(value);
+        return value.hashCode();
     }
 
     @Override
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/tableservice/AbstractOvsdbTableService.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/tableservice/AbstractOvsdbTableService.java
index 6b7c797..af1a01d 100644
--- a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/tableservice/AbstractOvsdbTableService.java
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/tableservice/AbstractOvsdbTableService.java
@@ -210,7 +210,7 @@
             return null;
         }
         ColumnDescription columnDesc = new ColumnDescription("_uuid", "getTableUuidColumn");
-        return (Column) getColumnHandler(columnDesc);
+        return getColumnHandler(columnDesc);
     }
 
     @Override
@@ -228,7 +228,7 @@
             return null;
         }
         ColumnDescription columnDesc = new ColumnDescription("_version", "getTableVersionColumn");
-        return (Column) getColumnHandler(columnDesc);
+        return getColumnHandler(columnDesc);
     }
 
     /**
@@ -260,7 +260,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(row);
+        return row.hashCode();
     }
 
     @Override
@@ -277,7 +277,7 @@
 
     @Override
     public String toString() {
-        TableSchema schema = (TableSchema) getTableSchema();
+        TableSchema schema = getTableSchema();
         String tableName = schema.name();
         return toStringHelper(this).add("tableName", tableName).add("row", row).toString();
     }