missing jsf textfields in my dynamic web application when deployed to Google App Engine - google-app-engine

I´m developing a dynamic web project using JSF components in the web application and when I test it in Eclipse running with tomcat 7 server, it displays the jsf components(such as textfields) normally. When I publish it to Google App Engine, my jsf textfields dissappear.
it´s in this link: http://calculadorawebtextfield.appspot.com/
and the xhtml is fine after you inspect code. Am I missing something on my web.xml?

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Vaadin 13 UI Components keeps reloading when deployed in Google App Engine

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When I run this code:
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Posted this same question in Vaadin forum and someone answered:
Google App Engine does not support sticky sessions and will route HTTP requests to random servers which do not necessarily have an up-to-date version of the HTTP session for the user. Because of this, it won't work as the UI state is store in the HTTP session.
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source: Vaadin 13 Forum

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