[Seaside] WASession>>#unregister fails due to @parent isNil

[Johan Brichau]

Hi Joachim,

What version of Seaside are you running?

cheers
Johan

> On 11 Jul 2017, at 08:30, jtuchel at objektfabrik.de wrote:
> 
> Seasiders
> From time to time we get walkbacks on our production servers when users want to login/create a new session due to failed cleanup/unregister of old sessions.
> 
> Here's an excerpt from the walkback (VA Smalltalk):
> 
> MessageNotUnderstood class(Exception class)>>#signalWith:
>   receiver = MessageNotUnderstood
>   arg1 = (nil Message (#unregisterAt:, ('PZv9N5QPtkzYQMvH')))
> UndefinedObject(Object)>>#doesNotUnderstand:
>   receiver = nil
>   arg1 = Message (#unregisterAt:, ('PZv9N5QPtkzYQMvH'))
> KontolinoSession(WASession)>>#unregister
>   receiver = a KontolinoSession
> KontolinoSession>>#unregister
>   receiver = a KontolinoSession
> Looking at WASession>>#unregister it is clear that the variable @parent isNil and therefor unregister cannot work. 
> Now I am wondering
> 
> how could @parent become nil? 
> The only thing I can think of is a user clicking on "logout" twice. The logs of our application, however, don't support this thesis...
> is this a (known and/or even fixed) bug in Seaside or our code? We haven't implemented any access to the @parent variable...
> is it a good workaround to intrudoce a notNil check in our WASession subclass' #unregister method before sending super unregister? 
> We will try this of course because it is not a good marketing gag to greet users with an error screen instead of a login form
> 
> Any hints, ideas, requests for more details are welcome.
> 
> 
> Joachim 
> -- 
> -----------------------------------------------------------------------
> Objektfabrik Joachim Tuchel          mailto:jtuchel at objektfabrik.de <mailto:jtuchel at objektfabrik.de>
> Fliederweg 1                         http://www.objektfabrik.de <http://www.objektfabrik.de/>
> D-71640 Ludwigsburg                  http://joachimtuchel.wordpress.com <http://joachimtuchel.wordpress.com/>
> Telefon: +49 7141 56 10 86 0         Fax: +49 7141 56 10 86 1
> 
> _______________________________________________
> seaside mailing list
> seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squeakfoundation.org/pipermail/seaside/attachments/20170711/9b2c0675/attachment.html>