diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
index 38e58047517..ecae28ff4f7 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
@@ -99,24 +99,24 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
             @QueryParam("owner") String owner,
             List<String> deviceIdentifiers){
         try {
-            if (DeviceMgtAPIUtils.getDeviceManagementService().updateEnrollment(owner, deviceIdentifiers)){
+            if (DeviceMgtAPIUtils.getDeviceManagementService().updateEnrollment(owner, deviceIdentifiers)) {
                 String msg = "Device owner is updated successfully.";
                 return Response.status(Response.Status.OK).entity(msg).build();
             }
             String msg = "Device owner updating is failed.";
             log.error(msg);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
-        } catch(InvalidDeviceException e){
+        } catch (InvalidDeviceException e) {
             String msg = "Invalid device identifiers are found with the request.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
-        }catch (DeviceManagementException e) {
+        } catch (DeviceManagementException e) {
             String msg = "Error occurred when updating device owners.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (UserNotFoundException e) {
             String msg = "Couldn't found the owner in user store to update the owner of devices.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         }
     }
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java
index 5ea2a87b5b6..6674c37a778 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java
@@ -498,7 +498,8 @@ public interface DeviceDAO {
      * @throws DeviceManagementDAOException throws {@link DeviceManagementDAOException} if connections establishment
      * fails.
      */
-    List<Device> getDevicesByIdentifiers(List<String> deviceIdentifiers, int tenantId) throws DeviceManagementDAOException;
+    List<Device> getDevicesByIdentifiers(List<String> deviceIdentifiers, int tenantId)
+            throws DeviceManagementDAOException;
 
     /**
      * This method is used to permanently delete the device and its related details
@@ -508,4 +509,3 @@ public interface DeviceDAO {
      */
     void deleteDevice(DeviceIdentifier deviceIdentifier, int tenantId) throws DeviceManagementDAOException;
 }
-
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java
index 1cd83aa7948..413e9bc56c3 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java
@@ -1507,8 +1507,8 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
             }
             return devices;
         } catch (SQLException e) {
-            throw new DeviceManagementDAOException("Error occurred while obtaining the DB connection when adding tags",
-                    e);
+            throw new DeviceManagementDAOException("Error occurred while obtaining the DB connection to get devices for"
+                    + " given device identifiers.", e);
         }
     }
     
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
index 7bbb94bc897..77aab5bae9d 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java
@@ -369,7 +369,11 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
         try {
             Connection conn = this.getConnection();
             boolean updateStatus = true;
-            String sql = "UPDATE DM_ENROLMENT SET OWNER = ? WHERE ID = ? AND TENANT_ID = ?";
+            String sql = "UPDATE "
+                    + "DM_ENROLMENT "
+                    + "SET OWNER = ? "
+                    + "WHERE ID = ? AND "
+                    + "TENANT_ID = ?";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
                 if (conn.getMetaData().supportsBatchUpdates()) {
                     for (Device device : devices) {
@@ -381,6 +385,7 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
                     for (int i : ps.executeBatch()) {
                         if (i == 0 || i == Statement.SUCCESS_NO_INFO || i == Statement.EXECUTE_FAILED) {
                             updateStatus = false;
+                            break;
                         }
                     }
                 } else {
@@ -390,14 +395,15 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
                         ps.setInt(3, tenantId);
                         if (ps.executeUpdate() == 0) {
                             updateStatus = false;
+                            break;
                         }
                     }
                 }
             }
             return updateStatus;
         } catch (SQLException e) {
-            throw new DeviceManagementDAOException("Error occurred while obtaining the DB connection when adding tags",
-                    e);
+            throw new DeviceManagementDAOException("Error occurred while obtaining the DB connection to update the "
+                    + "owner of the device enrollment.", e);
         }
     }
 
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
index 11b6866433f..943ee8079c1 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
@@ -3086,12 +3086,12 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
                 DeviceManagementDAOFactory.rollbackTransaction();
                 return false;
             } catch (TransactionManagementException e) {
-                String msg = "Error occurred while initiating transaction";
+                String msg = "Error occurred while initiating the transaction.";
                 log.error(msg, e);
                 throw new DeviceManagementException(msg, e);
             } catch (DeviceManagementDAOException e) {
                 String msg = "Error occurred either verifying existence of device ids or updating owner of the device.";
-                log.error(msg);
+                log.error(msg, e);
                 throw new DeviceManagementException(msg, e);
             } finally {
                 DeviceManagementDAOFactory.closeConnection();
@@ -3114,7 +3114,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             return owner;
         } catch (UserStoreException e) {
             String msg = "Error occurred when checking whether owner is exist or not. Owner: " + owner;
-            log.error(msg);
+            log.error(msg, e);
             throw new DeviceManagementException(msg, e);
         }
     }
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/UserManagementService.java b/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/UserManagementService.java
index a1bee403a8b..3cb23087b84 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/UserManagementService.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/UserManagementService.java
@@ -147,6 +147,7 @@ import java.util.List;
                         key = "perm:get-activity",
                         permissions = {"/device-mgt/devices/owning-device/view"}
                 )
+
         }
 )
 @Path("/users")
diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
index 7227f3cb0c5..ddbf7eb72ec 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.v09.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java
@@ -97,24 +97,24 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
             @QueryParam("owner") String owner,
             List<String> deviceIdentifiers){
         try {
-            if (DeviceMgtAPIUtils.getDeviceManagementService().updateEnrollment(owner, deviceIdentifiers)){
+            if (DeviceMgtAPIUtils.getDeviceManagementService().updateEnrollment(owner, deviceIdentifiers)) {
                 String msg = "Device owner is updated successfully.";
                 return Response.status(Response.Status.OK).entity(msg).build();
             }
             String msg = "Device owner updating is failed.";
             log.error(msg);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
-        } catch(InvalidDeviceException e){
+        } catch (InvalidDeviceException e) {
             String msg = "Invalid device identifiers are found with the request.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
-        }catch (DeviceManagementException e) {
+        } catch (DeviceManagementException e) {
             String msg = "Error occurred when updating the device owner.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (UserNotFoundException e) {
             String msg = "Couldn't found the owner in user store to update the owner of devices.";
-            log.error(msg);
+            log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         }
     }