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Article ID: 164495 - Last Review: May 2, 2006 - Revision: 4.1
FIX: GPF on Session Expiration Using Active Server Pages
This article was previously published under Q164495
Under certain circumstances, you may see a Genereral Protection Fault (GPF) when a session expires, or when Microsoft Internet Information Server is shut down.
This error is caused by a reference counting problem in Active Server
Pages (ASP, which can occur if you attempt store an array containing
objects in a Session variable. Consider the code example below:
dim Arr(1)
Arr(0) = Server.CreateObject("MyProgID.MyClassId")
Session("MyVar") = Arr
When the session ends, or is terminated by an Internet Information Server
shutdown, the object pointer is released. In addition, VariantClear() is
called on the Variant containing the array "Arr". This results in a second
attempt to release the object pointer stored in "Arr", and thus a GPF.
The best workaround for this problem is to avoid storing arrays of objects
in Session variables.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
This bug was corrected in Windows 2000.
Steps to Reproduce Behavior
The following ASP page may cause the described error to occur when IIS is
shut down or the session expires.
PAGE1.ASP
<HTML>
<HEAD><TITLE>Document Title</TITLE></HEAD>
<BODY>
<%
Dim MyArray(2)
Set MyArray(1) = Server.CreateObject("ADODB.Connection")
Set MyArray(2) = Server.CreateObject("ADODB.Connection")
Session("SessionAry") = MyArray
%>
</BODY>
</HTML>
For the latest Knowledge Base articles and other support information on
Visual InterDev and Active Server Pages, see the following page on the
Microsoft Technical Support site:
APPLIES TO
- Microsoft Active Server Pages 4.0
- Microsoft Internet Information Server 4.0
| kbaspobj kbbug kbfix kbiis500fix kboswin2000fix kbwebserver KB164495 |
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