Communication problem.

General
1

I am getting the error “Communication problem” when I publish my web application in production environment (Tomcat 6.0). In the development environment everything works perfectly.

Specifically, the message text that appears on the screen in a red frame is:

[b]
Communication problem

Take note of any unsaved data, and click here to continue.

(SyntaxError): missing ) in parenthetical stack: Feb(" HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">\n\n\n\n
Method Not Implemented
\n

POST to /vaadin/vaadin/UIDL/ not supported.
\n
\n")@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:2877 Wdb([object Object]
,[object Object]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:4294 Ueb([object Object]
,[object Object]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:3620 Web([object Object]
,[object Object]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:4233 kC([object Object]
,[object Object]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:3632 PC([object XMLHttpRequest]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:2670 ([object Event]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:2883 Gn((function () {a.Wb(b);}),[object XMLHttpRequest]
,[object Arguments]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:3120 ([object Event]
)@http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html:2662 fileName: http://www.sinaissistemas.com.br/vaadin/VAADIN/widgetsets/com.vaadin.terminal.gwt.DefaultWidgetSet/B56D3381FA7251D658B90D82A2A1E318.cache.html lineNumber: 2877 - Original JSON-text: HTML PUBLIC “-//IETF//DTD HTML 2.0//EN”>
Method Not Implemented

POST to /vaadin/vaadin/UIDL/ not supported.
[/b]

Anyone have any ideas?

Norival Hübner

2

My first guess would be that the response that the browser is getting from a UIDL request is some HTML rather than some JSON/UIDL (perhaps a 404?). I’d guess that /vaadin/vaadin/UIDL isn’t wired up to Vaadin’s servlet properly. Check your web.xml and tomcat’s configuration?

3

Hello Royce,

From which version of tomcat is safe to use the vaadin. What exactly should it be configured to vaadin

In this case, the web.xml is:

Norival Hübner