Merge pull request #1202 from rasika/fix-1724

Fix the issue of an error printed when shutting down the IoT Server

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

@@ -23,6 +23,7 @@ import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.mgt.common.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.DeviceStatusTaskPluginConfig;
+import org.wso2.carbon.device.mgt.common.InvalidConfigurationException;
 import org.wso2.carbon.device.mgt.common.OperationMonitoringTaskConfig;
 import org.wso2.carbon.device.mgt.common.ProvisioningConfig;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManager;
@@ -167,10 +168,14 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
             }
         }
         if (operationManager != null) {
+            try {
                 NotificationStrategy notificationStrategy = operationManager.getNotificationStrategy();
                 if (notificationStrategy != null) {
                     notificationStrategy.undeploy();
                 }
+            } catch (InvalidConfigurationException ignore) {
+                //error occurred while undeploying strategy, ignore error
+            }
             operationManagerRepository.removeOperationManager(deviceTypeIdentifier);
         }
     }