Merge pull request #939 from harshanL/master

Fixes for product-iots#1367 and product-iots#1285

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/DeviceManagementPluginRepository.java

@@ -350,7 +350,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         if (deviceStatusTaskPluginConfig != null && deviceStatusTaskPluginConfig.isRequireStatusMonitoring()) {
             try {
                 DeviceManagementDataHolder.getInstance().removeDeviceStatusTaskPluginConfig(deviceType);
-                deviceStatusTaskManagerService.stopTask(deviceType, deviceStatusTaskPluginConfig);
+                if (deviceStatusTaskManagerService != null) {
+                    deviceStatusTaskManagerService.stopTask(deviceType, deviceStatusTaskPluginConfig);
+                }
             } catch (DeviceStatusTaskException e) {
                 throw new DeviceManagementException("Error occurred while stopping Device Status task service for '" +
                         deviceManagementService.getType() + "'", e);

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -2333,8 +2333,14 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             DeviceManagementDAOFactory.openConnection();
             info = deviceInfoDAO.getDeviceInformation(device.getId());
             DeviceLocation location = deviceInfoDAO.getDeviceLocation(device.getId());
-            if (info != null) {
-                info.setLocation(location);
+            if (location != null) {
+                //There are some cases where the device-info is not updated properly. Hence returning a null value.
+                if (info != null) {
+                    info.setLocation(location);
+                } else {
+                    info = new DeviceInfo();
+                    info.setLocation(location);
+                }
             }
         } catch (DeviceDetailsMgtDAOException e) {
             String msg = "Error occurred while retrieving advance info of '" + device.getType() +