[Zope] Error on simultaneous updates/requests

Fri Jan 2 17:01:15 EST 2004

I am working on an order entry system, and am getting a frequent error when
multiple users are accessing the system.

The error occurs most frequently when one user posts data which updates one
or more folderish objects, and another user wants to get data at the same
time as (or shortly after) the update. In most (all?) cases this is not the
data that has been changed, or even data within the object that has been
changed, but is data that must be found by acquisition, passing up a tree
through one or more of the folderish objects that are being updated.

The error message is "The object at XXX has an empty or missing docstring.
Objects must have a docstring to be published", but has no obvious
connection to a missing docstring - if the request is attempted again a few
moments later, it works fine.

Does anyone have any thoughts on the possible cause of this problem and/or
how to solve it? (More info below)

--Sean Hastings

--------------------------------
SYSTEM INFO AND ERROR LOG ENTRY
--------------------------------

Zope Version  (Zope 2.6.1 (binary release, python 2.1, linux2-x86), python
2.1.3, linux2)
Python Version  2.1.3 (#1, Sep 19 2002, 13:15:46) [GCC egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)]
System Platform  linux2
SOFTWARE_HOME  /Zope/lib/python
ZOPE_HOME  /Zope
INSTANCE_HOME  /Zope
CLIENT_HOME  /Zope/var
Process Id  18671 (65541)
Running For  20 days 23 hours 33 min 0 sec

----------------

Site Error Log at  /error_log

Exception traceback

Time 2004/01/01 18:45:37.760 US/Eastern
User Name (User Id) Anonymous User (None)
Request URL http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300
Exception Type NotFound
Exception Value <TABLE BORDER="0" WIDTH="100%"> <TR VALIGN="TOP"> <TD
WIDTH="10%" ALIGN="CENTER"> &nbsp; </TD> <TD WIDTH="90%"> <H2>Site
Error</H2> <P>An error was encountered while publishing this resource. </P>
<P><STRONG>Debugging Notice</STRONG></P> Zope has encountered a problem
publishing your object.<p> The object at
http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300 has an empty or
missing docstring. Objects must have a docstring to be published. <HR
NOSHADE> <P>Troubleshooting Suggestions</P> <UL> <LI>The URL may be
incorrect.</LI> <LI>The parameters passed to this resource may be
incorrect.</LI> <LI>A resource that this resource relies on may be
encountering an error.</LI> </UL> <P>For more detailed information about the
error, please refer to the HTML source for this page. </P> <P>If the error
persists please contact the site maintainer. Thank you for your patience.
</P> </TD></TR> </TABLE>

Traceback (innermost last):

Module ZPublisher.Publish, line 89, in publish
Module ZPublisher.BaseRequest, line 341, in traverse
Module ZPublisher.HTTPResponse, line 636, in debugError
NotFound: <TABLE BORDER="0" WIDTH="100%"> <TR VALIGN="TOP"> <TD WIDTH="10%"
ALIGN="CENTER"> &nbsp; </TD> <TD WIDTH="90%"> <H2>Site Error</H2> <P>An
error was encountered while publishing this resource. </P>
<P><STRONG>Debugging Notice</STRONG></P> Zope has encountered a problem
publishing your object.<p> The object at
http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300 has an empty or
missing docstring. Objects must have a docstring to be published. <HR
NOSHADE> <P>Troubleshooting Suggestions</P> <UL> <LI>The URL may be
incorrect.</LI> <LI>The parameters passed to this resource may be
incorrect.</LI> <LI>A resource that this resource relies on may be
encountering an error.</LI> </UL> <P>For more detailed information about the
error, please refer to the HTML source for this page. </P> <P>If the error
persists please contact the site maintainer. Thank you for your patience.
</P> </TD></TR> </TABLE>

Display traceback as text

REQUEST
form

cookies
_ZopeId '87235459A1ITlILzPcQ'

lazy items
SESSION <bound method SessionDataManager.getSessionData of
<SessionDataManager instance at 101d5f50>>

other
SERVER_URL 'http://192.168.1.100:9980'
TraversalRequestNameStack ['tabs_html', '300', '0300s', 'Polish', 'H',
'accounts', 'bank']
URL 'http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300'
URL0 http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300
URL1 http://192.168.1.100:9980/bank/accounts/H/Polish/0300s
URL2 http://192.168.1.100:9980/bank/accounts/H/Polish
URL3 http://192.168.1.100:9980/bank/accounts/H
URL4 http://192.168.1.100:9980/bank/accounts
URL5 http://192.168.1.100:9980/bank
URL6 http://192.168.1.100:9980
BASE0 http://192.168.1.100:9980
BASE1 http://192.168.1.100:9980
BASE2 http://192.168.1.100:9980/bank
BASE3 http://192.168.1.100:9980/bank/accounts
BASE4 http://192.168.1.100:9980/bank/accounts/H
BASE5 http://192.168.1.100:9980/bank/accounts/H/Polish
BASE6 http://192.168.1.100:9980/bank/accounts/H/Polish/0300s
BASE7 http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300

environ
HTTP_ACCEPT_ENCODING 'gzip, deflate'
channel.creation_time 1073000735
SERVER_PROTOCOL 'HTTP/1.1'
SERVER_PORT '9980'
PATH_INFO
'/bank/accounts/H/Polish/0300s/300/bank/accounts/H/Polish/0300s/300/tabs_htm
l'
HTTP_HOST '192.168.1.100:9980'
REQUEST_METHOD 'GET'
PATH_TRANSLATED
'/bank/accounts/H/Polish/0300s/300/bank/accounts/H/Polish/0300s/300/tabs_htm
l'
HTTP_COOKIE '_ZopeId="87235459A1ITlILzPcQ"'
SCRIPT_NAME ''
SERVER_SOFTWARE 'Zope/(Zope 2.6.1 (binary release, python 2.1, linux2-x86),
python 2.1.3, linux2) ZServer/1.1b1'
HTTP_ACCEPT_LANGUAGE 'en-us'
HTTP_ACCEPT 'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword,
application/x-shockwave-flash, */*'
REMOTE_ADDR '192.168.1.8'
HTTP_REFERER
'http://192.168.1.100:9980/bank/accounts/H/Polish/0300s/300/offers_layout_ht
ml?account_url=bank/accounts/H/Polish/0300s/300'
SERVER_NAME 'vault'
GATEWAY_INTERFACE 'CGI/1.1'
HTTP_USER_AGENT 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)'