Question

The Vaadin web framework displays a red error alert for any uncaught exceptions:

Internal error

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…

The Vaadin documentation describes how to set a custom error handler.

When I provide a custom error handler, the default red error alert still shows up. When the user dismisses that error alert, then the custom error alert appears. I would like to only show the custom error alert. How can one disable the default "Internal error" alert?

Below is the overridden terminalError method of my vaadin Application class:

@Override   public void terminalError(Terminal.ErrorEvent event) {
    // Call the default implementation.
    super.terminalError(event);

    // Some custom behaviour.
    if (getMainWindow() != null) {
        getMainWindow().showNotification(
                "An unchecked exception occured!",
                event.getThrowable().toString(),
                Notification.TYPE_ERROR_MESSAGE);
    }   }

Answer 1

Do both actions happens because you call super.terminalError(event)?

Or do you have to clear the component error that is set in this method?