<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Joachim,<div class=""><br class=""></div><div class="">What version of Seaside are you running?</div><div class=""><br class=""></div><div class="">cheers</div><div class="">Johan</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 11 Jul 2017, at 08:30, <a href="mailto:jtuchel@objektfabrik.de" class="">jtuchel@objektfabrik.de</a> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="content-type" content="text/html; charset=utf-8" class="">
<div bgcolor="#FFFFFF" text="#000000" class=""><p class="">Seasiders<br class="">
</p><p class="">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.</p><p class="">Here's an excerpt from the walkback (VA Smalltalk):</p><p class=""><tt class="">MessageNotUnderstood class(Exception
class)>>#signalWith:</tt><tt class=""><br class="">
</tt><tt class=""> receiver = MessageNotUnderstood</tt><tt class=""><br class="">
</tt><tt class=""> arg1 = (nil Message (#unregisterAt:,
('PZv9N5QPtkzYQMvH')))</tt><tt class=""><br class="">
</tt><tt class="">UndefinedObject(Object)>>#doesNotUnderstand:</tt><tt class=""><br class="">
</tt><tt class=""> receiver = nil</tt><tt class=""><br class="">
</tt><tt class=""> arg1 = Message (#unregisterAt:, ('PZv9N5QPtkzYQMvH'))</tt><tt class=""><br class="">
</tt><tt class="">KontolinoSession(WASession)>>#unregister</tt><tt class=""><br class="">
</tt><tt class=""> receiver = a KontolinoSession</tt><tt class=""><br class="">
</tt><tt class="">KontolinoSession>>#unregister</tt><tt class=""><br class="">
</tt><tt class=""> receiver = a KontolinoSession</tt><br class="">
</p><p class="">Looking at WASession>>#unregister it is clear that the
variable @parent isNil and therefor unregister cannot work. <br class="">
</p><p class="">Now I am wondering</p>
<ul class="">
<li class="">how could @parent become nil? <br class="">
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...<br class="">
</li>
<li class="">is this a (known and/or even fixed) bug in Seaside or our
code? We haven't implemented any access to the @parent
variable...<br class="">
</li>
<li class="">is it a good workaround to intrudoce a notNil check in our
WASession subclass' #unregister method before sending super
unregister? <br class="">
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<br class="">
</li>
</ul><p class=""><br class="">
</p><p class="">Any hints, ideas, requests for more details are welcome.</p><p class=""><br class="">
</p><p class="">Joachim <br class="">
</p>
<pre class="moz-signature" cols="72">--
-----------------------------------------------------------------------
Objektfabrik Joachim Tuchel <a class="moz-txt-link-freetext" href="mailto:jtuchel@objektfabrik.de">mailto:jtuchel@objektfabrik.de</a>
Fliederweg 1 <a class="moz-txt-link-freetext" href="http://www.objektfabrik.de/">http://www.objektfabrik.de</a>
D-71640 Ludwigsburg <a class="moz-txt-link-freetext" href="http://joachimtuchel.wordpress.com/">http://joachimtuchel.wordpress.com</a>
Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1
</pre>
</div>
_______________________________________________<br class="">seaside mailing list<br class=""><a href="mailto:seaside@lists.squeakfoundation.org" class="">seaside@lists.squeakfoundation.org</a><br class="">http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside<br class=""></div></blockquote></div><br class=""></div></body></html>