diff --git a/hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/RolloutManagementTest.java b/hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/RolloutManagementTest.java
index 381e9722d..a23ada6e6 100644
--- a/hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/RolloutManagementTest.java
+++ b/hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/RolloutManagementTest.java
@@ -34,13 +34,13 @@ import org.eclipse.hawkbit.repository.model.RolloutGroup.RolloutGroupErrorAction
 import org.eclipse.hawkbit.repository.model.RolloutGroup.RolloutGroupErrorCondition;
 import org.eclipse.hawkbit.repository.model.RolloutGroup.RolloutGroupStatus;
 import org.eclipse.hawkbit.repository.model.RolloutGroup.RolloutGroupSuccessCondition;
-import org.eclipse.hawkbit.repository.test.util.TestdataFactory;
 import org.eclipse.hawkbit.repository.model.RolloutGroupConditionBuilder;
 import org.eclipse.hawkbit.repository.model.RolloutGroupConditions;
 import org.eclipse.hawkbit.repository.model.SoftwareModule;
 import org.eclipse.hawkbit.repository.model.Target;
 import org.eclipse.hawkbit.repository.model.TargetUpdateStatus;
 import org.eclipse.hawkbit.repository.model.TotalTargetCountStatus;
+import org.eclipse.hawkbit.repository.test.util.TestdataFactory;
 import org.junit.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Description;
@@ -56,9 +56,6 @@ import ru.yandex.qatools.allure.annotations.Stories;
 
 /**
  * Junit tests for RolloutManagment.
- * 
- * @author Michael Hirsch
- *
  */
 @Features("Component Tests - Repository")
 @Stories("Rollout Management")
diff --git a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/components/HawkbitUIErrorHandler.java b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/components/HawkbitUIErrorHandler.java
index 7729b72a4..cdbd04034 100644
--- a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/components/HawkbitUIErrorHandler.java
+++ b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/components/HawkbitUIErrorHandler.java
@@ -18,13 +18,17 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.google.common.base.Optional;
+import com.vaadin.server.ClientConnector.ConnectorErrorEvent;
 import com.vaadin.server.DefaultErrorHandler;
 import com.vaadin.server.ErrorEvent;
 import com.vaadin.server.Page;
+import com.vaadin.shared.Connector;
 import com.vaadin.ui.Component;
+import com.vaadin.ui.Notification.Type;
+import com.vaadin.ui.UI;
 
 /**
- * Default handler for SP UI.
+ * Default handler for Hawkbit UI.
  */
 public class HawkbitUIErrorHandler extends DefaultErrorHandler {
 
@@ -36,26 +40,36 @@ public class HawkbitUIErrorHandler extends DefaultErrorHandler {
     @Override
     public void error(final ErrorEvent event) {
 
-        final Optional<Page> originError = getPageOriginError(event);
-
-        if (originError.isPresent()) {
-            final HawkbitErrorNotificationMessage message = buildNotification(getRootExceptionFrom(event));
-            message.show(originError.get());
+        final HawkbitErrorNotificationMessage message = buildNotification(getRootExceptionFrom(event));
+        if (event instanceof ConnectorErrorEvent) {
+            final Connector connector = ((ConnectorErrorEvent) event).getConnector();
+            if (connector instanceof UI) {
+                final UI uiInstance = (UI) connector;
+                uiInstance.access(() -> message.show(uiInstance.getPage()));
+                return;
+            }
         }
+
+        final Optional<Page> originError = getPageOriginError(event);
+        if (originError.isPresent()) {
+            message.show(originError.get());
+            return;
+        }
+
+        HawkbitErrorNotificationMessage.show(message.getCaption(), message.getDescription(), Type.HUMANIZED_MESSAGE);
     }
 
     private static Throwable getRootExceptionFrom(final ErrorEvent event) {
-
         return getRootCauseOf(event.getThrowable());
     }
 
-    private static Throwable getRootCauseOf(final Throwable exception) {
+    private static Throwable getRootCauseOf(final Throwable ex) {
 
-        if (exception.getCause() != null) {
-            return getRootCauseOf(exception.getCause());
+        if (ex.getCause() != null) {
+            return getRootCauseOf(ex.getCause());
         }
 
-        return exception;
+        return ex;
     }
 
     private static Optional<Page> getPageOriginError(final ErrorEvent event) {
@@ -66,18 +80,21 @@ public class HawkbitUIErrorHandler extends DefaultErrorHandler {
             return Optional.fromNullable(errorOrigin.getUI().getPage());
         }
 
-        return Optional.of(Page.getCurrent());
+        return Optional.absent();
     }
 
-    protected HawkbitErrorNotificationMessage buildNotification(final Throwable exception) {
-        LOG.error("Error in UI: ", exception);
-        return createHawkbitErrorNotificationMessage(exception);
-    }
-
-    protected HawkbitErrorNotificationMessage createHawkbitErrorNotificationMessage(final Throwable exception) {
+    /**
+     * Method to build a notification based on an exception.
+     * 
+     * @param ex
+     *            the throwable
+     * @return a hawkbit error notification message
+     */
+    protected HawkbitErrorNotificationMessage buildNotification(final Throwable ex) {
+        LOG.error("Error in UI: ", ex);
         final I18N i18n = SpringContextHelper.getBean(I18N.class);
         return new HawkbitErrorNotificationMessage(STYLE, i18n.get("caption.error"),
-                i18n.get("message.error.temp", exception.getClass().getSimpleName()), false);
+                i18n.get("message.error.temp", ex.getClass().getSimpleName()), false);
     }
 
 }
diff --git a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/BulkUploadHandler.java b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/BulkUploadHandler.java
index 83082be01..116853afb 100644
--- a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/BulkUploadHandler.java
+++ b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/BulkUploadHandler.java
@@ -100,6 +100,7 @@ public class BulkUploadHandler extends CustomComponent
     final TargetBulkUpdateWindowLayout targetBulkUpdateWindowLayout;
 
     private transient EntityFactory entityFactory;
+    private final UI uiInstance;
 
     /**
      *
@@ -111,8 +112,9 @@ public class BulkUploadHandler extends CustomComponent
      */
     public BulkUploadHandler(final TargetBulkUpdateWindowLayout targetBulkUpdateWindowLayout,
             final TargetManagement targetManagement, final ManagementUIState managementUIState,
-            final DeploymentManagement deploymentManagement, final I18N i18n) {
+            final DeploymentManagement deploymentManagement, final I18N i18n, final UI uiInstance) {
         this.targetBulkUpdateWindowLayout = targetBulkUpdateWindowLayout;
+        this.uiInstance = uiInstance;
         this.comboBox = targetBulkUpdateWindowLayout.getDsNamecomboBox();
         this.descTextArea = targetBulkUpdateWindowLayout.getDescTextArea();
         this.targetManagement = targetManagement;
@@ -213,7 +215,6 @@ public class BulkUploadHandler extends CustomComponent
                  * below event.
                  */
                 eventBus.publish(this, new TargetTableEvent(TargetComponentEvent.BULK_UPLOAD_PROCESS_STARTED));
-
                 while ((line = reader.readLine()) != null) {
                     innerCounter++;
                     readEachLine(line, innerCounter, totalFileSize);
@@ -222,9 +223,7 @@ public class BulkUploadHandler extends CustomComponent
             } catch (final IOException e) {
                 LOG.error("Error reading file {}", tempFile.getName(), e);
             } catch (final RuntimeException e) {
-                if (UI.getCurrent() != null) {
-                    UI.getCurrent().getErrorHandler().error(new com.vaadin.server.ErrorEvent(e));
-                }
+                uiInstance.getErrorHandler().error(new ConnectorErrorEvent(uiInstance, e));
             } finally {
                 deleteFile();
             }
diff --git a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/TargetBulkUpdateWindowLayout.java b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/TargetBulkUpdateWindowLayout.java
index b77576411..bfc889e7f 100644
--- a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/TargetBulkUpdateWindowLayout.java
+++ b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/management/targettable/TargetBulkUpdateWindowLayout.java
@@ -52,6 +52,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.ProgressBar;
 import com.vaadin.ui.TextArea;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
 import com.vaadin.ui.themes.ValoTheme;
@@ -174,7 +175,7 @@ public class TargetBulkUpdateWindowLayout extends CustomComponent {
 
     private BulkUploadHandler getBulkUploadHandler() {
         final BulkUploadHandler bulkUploadHandler = new BulkUploadHandler(this, targetManagement, managementUIState,
-                deploymentManagement, i18n);
+                deploymentManagement, i18n, UI.getCurrent());
         bulkUploadHandler.buildLayout();
         bulkUploadHandler.addStyleName(SPUIStyleDefinitions.BULK_UPLOAD_BUTTON);
         return bulkUploadHandler;