DTML documents killing Zope (was RE: [Zope] ZServer dying)

[Mayers, Philip J]

Ok, I've narrowed down the circumstances a bit. The code actually looks more
like this:

## Script (Python) "showmachine_html"
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=machineid=None
##title=
##

REQUEST = context.REQUEST
RESPONSE = REQUEST.RESPONSE

print context.standard_html_header(context,REQUEST)

if machineid:
    # Call ZSQL method
    m = container.machine.SQL_get(machineid=machineid)[0]
    if m:
        m = m[0]
    else:
        machineid = None

if machineid and m:
    print container.machine.show_html(context,REQUEST,
                                      machineid='',
                                      owner='',
                                      ownerdept='',
                                      owneremail='',
                                      ownertel='',
                                      machinetype='',
                                      machineos='',
                                      machineserialno='',
                                      location='',
                                      comment=m.comment)

print context.standard_html_footer(context,REQUEST)
return printed

This will trigger it off. *If* the 12th parameter is a record property, then
the method will fail sporadically (but better than 90% of the time). There
can be >12 parameters though. Very, very odd. I'm trying to pare down the
example to one I can export - this is totally freaky.
Regards,
Phil

+----------------------------------+
| Phil Mayers, Network Support     |
| Centre for Computing Services    |
| Imperial College                 |
+----------------------------------+  

-----Original Message-----
From: Mayers, Philip J [mailto:p.mayers@ic.ac.uk]
Sent: 29 March 2001 09:40
To: 'Evan Simpson '; 'zope@zope.org '
Subject: RE: DTML documents killing Zope (was RE: [Zope] ZServer dying)


Actually that's not true - it does die sometimes, but more often it hangs.

Regards,
Phil

+----------------------------------+
| Phil Mayers, Network Support     |
| Centre for Computing Services    |
| Imperial College                 |
+----------------------------------+  

-----Original Message-----
From: Mayers, Philip J 
Sent: 28 March 2001 23:23
To: 'Evan Simpson '; Mayers, Philip J; 'zope@zope.org '
Subject: RE: DTML documents killing Zope (was RE: [Zope] ZServer dying)


There's nothing in the logs, and no core dump - it never actually *dies*,
either:

1) The child threads die, and on the following request they respawn
2) Only one child thread dies, the parents parent gets a SIGSTOP and the
process becomes unresponsive.

The application is... complex. I'll try to replicate it the behaviour as a
smaller sample tomorrow...

Cheers,
Phil

-----Original Message-----
From: Evan Simpson
To: Mayers, Philip J; zope@zope.org
Sent: 28/03/01 21:18
Subject: Re: DTML documents killing Zope (was RE: [Zope] ZServer dying)

From: "Mayers, Philip J" <p.mayers@ic.ac.uk>
> FYI - it appears to be the _number_ of parameters. If I call the DTML
> document with 12 parameters (context,REQUEST,p0=0,...p11=11) it fails
under
> load, anything less than that (i.e. drop *any* one or more of the
paramters)
> and it's ok.

Nothing shows up in the log?  Is there a core dump?  I can't replicate
this
using the latest from the 2.3 branch.  Could you send me a .zexp?

Cheers,

Evan @ digicool

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