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Zope hands when database takes too long to respond
by Sinang, Danny 08 Sep '06

08 Sep '06

Hello, We wrote an application (on Zope v2.7.6-final) that queries a MySQL database via ZMySQLDA v2.0.8. Whenever the MySQL server experiences heavy load, Zope seems to hang, such that we can't even access the ZMI. Is this a bug in version 2.7.6 or ZMySQLDA ? Or are there some settings I can tweak to adjust some database connection timeout value ? Regards, Danny

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Authentication Problem with migration from Zope 2.6.1 to Zope 2.9.4
by yogeen honnavar 08 Sep '06

08 Sep '06

Dear users, we have a zope application on an older system running Redhat 7.2 and Zope 2.6.1 with python 2.1. Now we wish to migrate the application to latest stable relase of zope 2.9.4 with python 2.4.3 we hv installed zope 2.9.4 and imported the application through .zexp file. this application uses LDAPUserFolder for authenticating against an LDAP server. After importing the application we recreated LDAPUserFolder instance as per the instructions. Now the problem is, when we access the application the Authentication pop-up dialog is not coming up and the application is trying to search the LDAP directory for Anonymous user and since the user does not exist in LDAP it is returning error Error: findUser. In the old zope server basic authentication dialog pops up when we access the URL. Can anyone suggest how to solve this problem ? How to configure the application as protected resource(we are using the built-in ZServer) so that authentication dialog pops up when the URL is accessed ? any help would be greatly appreciated. Thanks and Regards -Yogeen Honnavar __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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tal assignment
by David Bear 08 Sep '06

08 Sep '06

I wanted to assign a list object to a tal global variable but I can't seem to find the correct syntax. I tried: <div tal:define="global mylist=['item1', 'item2']" tal:content=""> blah </div> but it doesn't like that syntax. Googling turns up thousands of items that deal with tal but I can't see a simple example of assigning a list object to a variable name. -- David Bear phone: 602-496-0424 fax: 602-496-0955 College of Public Programs/ASU University Center Rm 622 411 N Central Phoenix, AZ 85007-0685 "Beware the IP portfolio, everyone will be suspect of trespassing"

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Need help tracing my application errors.
by Jose Carlos Balderas Alberico 07 Sep '06

07 Sep '06

Greetings. I have a problem with an application we have hosted in Zope, and I thought you could give me a hand. Basically, my question is: what's the easiest way to trace errors raised by a python script that's part of the application? This is the exact situation: I have to modify such application. It is a very big application, with a lot of python scripts, sql methods, etc... After testing it for the first time after the modification, nothing happens. By this I mean there is no error message, yet I know the application doesn't work right, since no data were inserted into the database. If it was an application developed in some other language, I'd just print messages on the screen to carry on with the debugging, and be able to know where the application is going. But this doesn't work with Zope. I just can't write "print 'some message'", because nothing gets written on the screen... I have tried with the Error_log object, but since the python script doesn't raise exceptions, no exceptions is captured by such object. I'm out of ideas here. What I basically want is some way of printing stuff somewhere, maybe a file, or the screen itself, to know where the application is in every moment. That way, locating the error would be far easier. Please, any help with this will be highly appreciated. Thank you very much in advance.

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Reading File Object in Script (Python)
by Ferhat Ayaz 07 Sep '06

07 Sep '06

Hi, I want to read a File object from ZODB. How can I read the content of the uploaded File object? I must to read it line by line with readlines() Can you show a little code block how to do this? Thanks and greets, Ferhat __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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request.locale - do we have this in 2.9.4?
by Maciej Wisniowski 07 Sep '06

07 Sep '06

Hi! I'm using Zope 2.9.4 with Five1.4 (linux box). I'm trying to use DateDisplayWidget (from /zope/app/form/browser/textwidgets.py) I get: *Error Type: AttributeError* *Error Value: locale ... Module Products.PageTemplates.Expressions, line 180, in _eval Module Products.PageTemplates.Expressions, line 85, in render Module zope.app.form.browser.textwidgets, line 538, in __call__ Module ZPublisher.HTTPRequest, line 1219, in __getattr__ Which is caused by this line: formatter = self.request.locale.dates.getFormatter( self._category, (self.displayStyle or None)) So is this something with my Zope that I don't have request.locale or is that a bug? -- Maciej Wisniowski *

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Can't stop Zope, machine hanging
by Ken Ara 07 Sep '06

07 Sep '06

Hi all, My Zope is stuck like never before. With my server on another continent, 8 hours time difference, and on a Sunday, I am pulling out my few remaining hairs... Our box runs FreeBSD 5, Zope 2.78 (if I remember correctly) and Squid. The ISP has been preparing for a move and shifted some machines, pulled some wires, and I see that the machine has rebooted. I can't restart or stop Zope - '/usr/local/www/Zope/zope01/bin/zopectl stop' just produces '........' for a long time - should I wait? I was unable to kill one of the python2.3 processes, and can't even reboot the machine, using 'shutdown -r now', as I have done previously in extremis. Any ideas? Not strictly a Zope question, but I would appreciate any help. Thanks. Ken __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: Zope hangs when database takes too long to respond
by Sinang, Danny 07 Sep '06

07 Sep '06

> It is a "known" limitation of Zope, which has a set number of "worker threads" available to service user requests. If a worker thread blocks (e.g., waiting for MySQL), it is not able to do any work for other pending requests. > You can tweak the number of threads in your zope.conf file, via the 'zserver-threads' directive (the default value is 4). If you do increase this value, you also need to increase the number of database connections avialble (via 'pool-size') which will increase the RAM required by your appserver. Thanks Tres. I found 'zserver-threads' in zope.conf, but couldn't find 'pool-size'. Am using Zope 2.7.6. Is this something available on higher versions of Zope ? Regards, Danny

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How best to copy and paste in pythonscript?
by Gaute Amundsen 07 Sep '06

07 Sep '06

Hi. I am having some strange problems getting copy and paste to work propperly in python script Basically I do: parent.manage_copyObjects([currFold.id], REQUEST) in one script, and: dest_fold.manage_pasteObjects(REQUEST) in another I have tried a lot of variations, and read all that I could goolge about it, but stil it won't work. Could somebody please tell me the "canonical" way of dooing this? Regards Gaute Amundsen

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Killing children process
by Alan 07 Sep '06

07 Sep '06

Hi List! Maybe it is more a question about python, but here it goes... I have an application in Zope which spawns a process (1) in background, a python program by the way. I monitor the process (1) via the PID returned. Embedded in (1), it uses os.system to run an application (2) which does the real job. (2) is a bash script with several embedded programs. However, sometimes I need to kill (1) (os.kill), and I hopped when killing (1), (2) and any of its children should be killed as well. But it does not happen; system (PID 1) inherit (2). I know if I were able to keep a list of any children and grandchildren process I could kill all of them smoothly, however for such a list I have no idea of doing it but: a)- doing a program to track them via unix command 'ps' output (maybe not reliable); b)- changing the code of the 3rd party programs (not really a good idea at all). All interaction are done via portal made in Zope. So, if someone could give any idea of how tackle with this problem, mainly avoiding a) and b), I would appreciate a lot. To simplify, I would like to know if python is able to kill a process and its 'family' without much hassle, and if so, how? Many thanks in advance. Cheers, Alan -- Alan Wilter S. da Silva, D.Sc. - Research Associate Department of Biochemistry, University of Cambridge. 80 Tennis Court Road, Cambridge CB2 1GA, UK. >>http://www.bio.cam.ac.uk/~awd28<<

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