Vinny, I have this in my appengine-web.xml file:
<sessions-enabled>true</sessions-enabled>
<async-session-persistence enabled="true" />
Still fails, will check with the session information. Thanks a lot, I may
need your help if still fails.
El miércoles, 14 de agosto de 2013 16:53:24 UTC-5, Vinny P escribió:
>
> On Wed, Aug 14, 2013 at 12:26 AM, Nelson Paz y Miño wrote:
>
>> In the second servlet I try to get the info from the session like this:
>>
>> String user_owner_id =
>> req.getSession().getAttribute("FBUserID").toString();
>> String fbcurrency = req.getSession().getAttribute("FBCurrID").toString();
>>
>> I'm able to get the first value, but not the second one. The browser is
>> getting 500 Server Error:
>>
>> The error I got in the App Engine Console Log is:
>>
>> Uncaught exception from servlet java.lang.NullPointerException at
>> guestbook.FBFriendCall.doGet(FBFriendCall.java:27)
>>
>>
>
> How are you using Sessions? Are you using App Engine's built-in sessions
> ability, or another framework? If you are using GAE's built-in sessions, do
> you have async-session-persistence turned on (
> https://developers.google.com/appengine/docs/java/config/appconfig#Java_appengine_web_xml_Enabling_sessions
> ),
> and if so, how much time elapses between a user visiting the first servlet
> and then the second servlet?
>
> Try calling getAttributeNames() on the session object, see what else is
> stored. The attribute name might be getting changed by a filter or another
> servlet.
>
>
> -----------------
> -Vinny P
> Technology & Media Advisor
> Chicago, IL
>
> App Engine Code Samples: http://www.learntogoogleit.com
>
>
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