Мы пользовались параметром restartApplication
«If you want to initialize a new application you can add the ?restartApplication parameter to the url. This will force the server to forget the (possibly) existing application and initialize a fresh one. This ensure for instance that a new Application instance is created and the init() method is executed.» vaadin.com/wiki/-/wiki/Main/Debugging+Vaadin+applications
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«If you want to initialize a new application you can add the ?restartApplication parameter to the url. This will force the server to forget the (possibly) existing application and initialize a fresh one. This ensure for instance that a new Application instance is created and the init() method is executed.»
vaadin.com/wiki/-/wiki/Main/Debugging+Vaadin+applications