[Zope] Strange session behavior

[Andrew Athan]

Zope is definitely not crashing.  The behavior is more apparent when I
set the limits in the session data manager (time & # of subobjects) to
0.  Strange, since these are supposed to be special values that mean
infinity.

I bet this is a problem in OOBtree or in the bucketing mechanism of
Transience.py

A.


-----Original Message-----
From: zope-admin@zope.org [mailto:zope-admin@zope.org] On Behalf Of
Chris McDonough
Sent: Thursday, January 23, 2003 11:05 PM
To: Andrew Athan
Cc: zope@zope.org
Subject: RE: [Zope] Strange session behavior


Hi Andrew,

Is it possible that Zope is crashing during the test?  Might you try
pointing the session data manager at a different transient object
container (one not in the temp folder)?

On Thu, 2003-01-23 at 22:48, Andrew Athan wrote:
> Stranger and stranger.  When the objects disappear, there is no slew 
> of calls to the deleteScript ... it is looking like the session data 
> manager just goes "poof"
>  
> A.
> 
> -----Original Message-----
> From: zope-admin@zope.org [mailto:zope-admin@zope.org] On Behalf Of 
> Andrew Athan
> Sent: Thursday, January 23, 2003 10:32 PM
> To: zope@zope.org
> Subject: RE: [Zope] Strange session behavior
> 
> 
> Further information:
>  
> By printing request['_ZopeId'] I am able to see that the session ID is

> being maintained even after the session data disappears (thus, cookies

> are working fine).  The problem is probably NOT in the browser ID 
> manager.
>  
> By monitoring the transient object folder after setting all timeouts 
> to 0 and using "ab -n 1000 http://localhost:8080/debug_test" to hit my

> little debug ZPT I see that the number of objects in the transient 
> folder is periodically reset to 0 through no obvious action of my own.
>  
> Any clues or known bugs here?
>  
> Andrew Athan
> 
> -----Original Message-----
> From: zope-admin@zope.org [mailto:zope-admin@zope.org] On Behalf Of 
> Andrew Athan
> Sent: Thursday, January 23, 2003 9:49 PM
> To: zope@zope.org
> Subject: [Zope] Strange session behavior
> 
> 
>  
> Hi, I'm using Zope 2.6.1b1 (but the same behavior is exhibited by 
> 2.6.0) and IE6 on XP.  Before I spend a long time debugging this I 
> thought I'd ask the list:
>  
> Either IE's cookie handling (doubt it, since I tried this with highly 
> permissive privacy settinngs) or Zope's browser id manager, or Zope's 
> session manager or Zope's transient objects folder is misbehaving.
>  
> Symptom:  Session data is periodically and intermittently lost within 
> a period of time much much shorter than the transient object timeout.
>  
> To test this I use a single IE window reloading the very same 
> "test.html" ZPT that simply checks for the existance of the key 'foo' 
> in REQUEST.SESSION and reports the result (and sets it to 1 always).
>  
> Preliminary evidence is that the problem is exacerbated by concurrent 
> request handling.  I test this using a windows client that utilizes 
> the WinHTTP COM+ object to generate requests running on a separate 
> machine (no chance of IE stepping on itself).
>  
> Of possible relevance is that external python methods are invoked to 
> fulfill the WinHTTP generated requests.
>  
> Any initial hints on where to look?
>  
> Thanks,
> Andrew Athan
>  
> 



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