diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/internal/DeviceManagementServiceComponent.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/internal/DeviceManagementServiceComponent.java
index 661eb616936..54b279bc45e 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/internal/DeviceManagementServiceComponent.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/internal/DeviceManagementServiceComponent.java
@@ -266,7 +266,7 @@ public class DeviceManagementServiceComponent {
 	 */
 	protected void unsetDeviceManager(DeviceMgtService deviceManager) {
 		if (log.isDebugEnabled()) {
-			log.debug("Unsetting Device Management Service Provider : '" + deviceManager.getProviderType() + "'");
+			log.debug("Un setting Device Management Service Provider : '" + deviceManager.getProviderType() + "'");
 		}
         try {
             this.getPluginRepository().removeDeviceManagementProvider(deviceManager);
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
index fdf39f8ddfc..35f0f0cd10f 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationDAOImpl.java
@@ -66,7 +66,6 @@ public class OperationDAOImpl implements OperationDAO {
             throw new OperationManagementDAOException("Error occurred while adding operation metadata", e);
         } finally {
             OperationManagementDAOUtil.cleanupResources(stmt, rs);
-            OperationManagementDAOFactory.closeConnection();
         }
     }
 
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/resources/sql/h2.sql b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/resources/sql/h2.sql
index d15a958212c..83a54104390 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/resources/sql/h2.sql
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/resources/sql/h2.sql
@@ -27,7 +27,7 @@ CREATE TABLE IF NOT EXISTS DM_OPERATION (
     CREATED_TIMESTAMP TIMESTAMP NOT NULL,
     RECEIVED_TIMESTAMP TIMESTAMP NULL,
     STATUS VARCHAR(50) NULL,
-    OPERATION_CODE VARCHAR(25) NOT NULL,
+    OPERATION_CODE VARCHAR(1000) NOT NULL,
     PRIMARY KEY (ID)
 );
 
diff --git a/features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/dbscripts/cdm/h2.sql b/features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/dbscripts/cdm/h2.sql
index 14f3265dd3c..57845c0d5ef 100644
--- a/features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/dbscripts/cdm/h2.sql
+++ b/features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/dbscripts/cdm/h2.sql
@@ -27,7 +27,7 @@ CREATE TABLE IF NOT EXISTS DM_OPERATION (
     CREATED_TIMESTAMP TIMESTAMP NOT NULL,
     RECEIVED_TIMESTAMP TIMESTAMP NULL,
     STATUS VARCHAR(50) NULL,
-    OPERATION_CODE VARCHAR(25) NOT NULL,
+    OPERATION_CODE VARCHAR(1000) NOT NULL,
     PRIMARY KEY (ID)
 );