Exactly that was the problem and have solved, as you mentioned me.
Thank you.
> Hi Vega!
>
> This is a known problem with some of the latest versions of Tomcat:
>
>
> * [WOOKIE-222] - There is a known issue when using Tomcat 7.* with
> Wookie. Sometimes when a widget is actually
> loaded, a browser alert box sometimes
> appears informing the user of
> a "Session Error".
>
> This is caused by the DWR library used
> by Wookie for Comet-based
> widgets handling HTTP-only cookies incorrectly;
> Tomcat 7 uses HTTP-only cookies as the
> default setting to prevent
> cross-site scripting (XSS) attacks.
>
> A workaround is to add the following
> to the WEB-INF/web.xml file
>
> <init-param>
>
> <param-name>crossDomainSessionSecurity</param-name>
> <param-value>false</param-value>
> </init-param>
>
> Note that XSS prevention will still be
> in place in Tomcat 7; this
> just disables the additional mechanism
> implemented in DWR that conflicts with
> it.
>
> This is an issue for DWR 2.* with
> Tomcat 7.* (or earlier versions of
> Tomcat where useHttpOnly="true" is set.)
>
> I hope this fixes the issue for you.
>
> -S
>
> PS Thank you for bringing this up as we really should add this to the FAQ
> on the website
>
>
> On 13 Oct 2011, at 18:01, [email protected] wrote:
>
>> hello!
>> I'm Vega of Salamanca, and I have written before to help me launch
>> Wookie
>> with tomcat and mysql, but now I have another problem: when using the
>> Demo
>> of a widget I get a message "Session error" with a button to accept . I
>> click on the button and the Demo of widgets works perfectly, any idea
>> what
>> I'm doing wrong? Why do I get the error message? Is there any way to
>> remove that message?
>> Thank you.
>>
>
>
