February 2001 - Zope

Sybase DA problem
by sathya rangaswamy 16 Feb '01

16 Feb '01

Hello , we get the following error when trying to test the sybase connection. We are using the version 11.9. Products.SybaseDAv2.db.Error: ct_command(): user api layer: external error: This routine cannot be called while results are pending for a command that has been sent to the server. Has anybody seen this before. Thanks sathya

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Strange TransactionError in ZODB
by Harald Koschinski 16 Feb '01

16 Feb '01

Hi, some times my zope 2.2.4 server gives the following error: -------------------------------------------------------------------------------------------- Zope Error Zope has encountered an error while publishing this resource. TransactionError Sorry, a Zope error occurred. Traceback (innermost last): File /usr/local/opt/Zope/server/test2/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /usr/local/opt/Zope/server/test2/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/opt/Zope/server/test2/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File /usr/local/opt/Zope/server/test2/lib/python/ZPublisher/Publish.py, line 175, in publish File /usr/local/opt/Zope/server/test2/lib/python/Zope/__init__.py, line 235, in commit File /usr/local/opt/Zope/server/test2/lib/python/ZODB/Transaction.py, line 208, in commit TransactionError: A serious error, which was probably a system error, occurred in a previous database transaction. This application may be in an invalid state and must be restarted before database updates can be allowed. Beware though that if the error was due to a serious system problem, such as a disk full condition, then the application may not come up until you deal with the system problem. See your application log for information on the error that lead to this problem. --------------------------------------------------------------------------------------------- In the documentation I found: --------------------------------------------------------------------------------------------- ZODB.Exceptions.StorageTransactionError Documentation This exception is raised if a storage method is called in an invalid state. Storages are required to raise this error under certain conditions. Applications should never encounter this exception unless there is a bug in ZODB or in a storage implementation. Concurrency sequential Persistence ----------------------------------------------------------------------------------------------- So it look´s like a serious error deep down in the ZODB transaction system. There are no problems on the OS (Linux 2.2.14), no disk full ... The error appears 2 times a week on a live running system with 100000 requests a day. When the error appears the only way to fix it, is to restart the server. Does anybody know the reason for this error? Is there a fix for it?? Is it fixed in Zope 2.3.x ?? Does DC know the problem, do they fix it? Any help is really appreciated. regards Harald _____________________________________________________________________ FRIATEC Aktiengesellschaft Informationssysteme und Organisation Tel. 0621 - 486 - 1454 Fax. 0621 - 486 - 1840 Steinzeugstrasse 50 mailto:harald.koschinski@friatec.de D-68229 Mannheim

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Can't Add a Z Search Interface!
by Ben Ocean 16 Feb '01

16 Feb '01

Hi; For some reason every time I try to enter a Z Search Interface I get either an HTTP 500 error or this error: >>> No searchable objects Traceback (innermost last): File /apache/Zope-2.2.4-linux2-x86/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /apache/Zope-2.2.4-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish File /apache/Zope-2.2.4-linux2-x86/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook File /apache/Zope-2.2.4-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish File /apache/Zope-2.2.4-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_addZSearch) File /apache/Zope-2.2.4-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_addZSearch) File /apache/Zope-2.2.4-linux2-x86/lib/python/Shared/DC/ZRDB/Search.py, line 100, in manage_addZSearch ValueError: (see above) <<< Wazzup? TIA, BenO

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Zope 2.3.0 (source release, python 1.5.2, linux2)
by Ng Pheng Siong 16 Feb '01

16 Feb '01

Zope Version Zope 2.3.0 (source release, python 1.5.2, linux2) ^^^^^^^^^^^^^^^^^^^^ Python Version 2.0 (#3, Oct 18 2000, 23:09:33) [GCC 2.95.2 19991024 (release)] ^^^ System Platform freebsd4 ^^^^^^^^ ;-) -- Ng Pheng Siong <ngps(a)post1.com> * http://www.post1.com/home/ngps

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best way to populate ZODB with ~11,000 folders?
by Kyler B. Laird 16 Feb '01

16 Feb '01

I'm trying to shove the University into Zope. I've got (~60K?) users handled and now I want to attack classes. We have a text file with roster data and an Oracle database of course info. My plan is to make a folder for every section of every course, and make objects or methods for every piece of data we have about each course (like "description" and "prerequisites") in these folders. This means I'll have paths like /courses/2001.1/AT/249/03/02 and that would have /courses/2001.1/AT/249/03/02/instructor even though the instructor might be acquired from a parent folder. So...my first step (late last night/early this morning) was to try to make folders for every section. We have 10,699 sections this semester, and I ran into some limits (like FastCGI timeout, then Netscape timeout, ...) in populating the ZODB. Before I just start kludging my way around this, I want to make sure there's not a better way. I'll be doing this every semester, so I want to do it well. Today I learned about XML-RPC. We're hard at work trying to get the HTTPS capability welded on to it. (We only use HTTPS for Zope.) It seems that it might be better to use this to populate the ZODB. Although I'd rather keep everything in Zope, I'm thinking I'd write a Python program that parses the text file and communicates with Oracle to get all of the data. As it's iterating over that data, it would shoot off XML-RPC transactions with Zope. There would be something on the order of 17,000 transactions. If I decide to handle rosters through the ZODB, there would be another 230,000 transactions. Is this a reasonable way to handle this? Am I going to kill the ZODB? Will I swamp it with transaction logs? I recall seeing that the ZODB isn't so great for writing. I'll be doing a lot of writing. We've used Oracle for everything, but I want so much to move completely to ZODB so that I can use ZEO. I'm willing to put in some extra effort to move down this path. Thank you. --kyler

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RE: [Zope] Simple problem (probably)...
by Jason.Jones＠awl.com 16 Feb '01

16 Feb '01

Thanks for the help, after seeing the first response I took a look at the book and sure enough, no colon. I had just copied and pasted without really checking the function. Thanks, Jason ---------- From: michel(a)digicool.com Sent: Friday, February 16, 2001 6:29 AM To: Jones, Jason Cc: zope(a)zope.org Subject: Re: [Zope] Simple problem (probably)... On 15 Feb 2001 Jason.Jones(a)awl.com wrote: > I am new to Zope and attempting to use an external method as described > in the zope book, unfortunately I keep getting the following error: > > Traceback (innermost last): > SyntaxError: (see above) > > The extension is indeed named "Example.py" and the method is the example from the book: > > def hello(name='world') > return "Hello %s" % name > > I'm using Zope 2.3 on Windows NT. > > Any ideas? You're missing a colon, and so is the book (I just fixed it in the source). It should be: def hello(name='world'): return "Hello %s" % name -Michel

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(no subject)
by Arenz, Ralph 16 Feb '01

16 Feb '01

Hello, at the moment I'am working with external python-Methods in Zope. To obtain that the changes in a python file takes effect i have to restart the zope server! Is there a way to avoid restarting zope after changing the content of the python module ? Ralph

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Join us at XML DevCon!
by Camelot Events Reminder 16 Feb '01

16 Feb '01

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + If you do not wish to receive future email messages, please forward this message to camelot-remove(a)dsi-epubs.net. (be sure to forward the ENTIRE message, or you may not be removed!) + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + XML DevCon is a series of conferences designed to expose developers to topical and timely information about enterprise XML and integration technologies. Each event updates developers on key XML-related specifications and technologies. The conferences provide instruction on designing documents and programming with XML application programming interfaces (APIs). The conferences also expose developers to XML application development using technologies such as middleware, databases, scripting, messaging, content aggregation, application servers, mobile computing, application-to-application integration, and enterprise Java. To register and for more information visit: http://www.xmldevcon2001.com Please join us at our upcoming events: LONDON, ENGLAND XML DevCon Europe - Spring 2001 Conference: February 21-23, Exhibition: February 22-23 Novotel - London, England NEW YORK, NEW YORK XML DevCon - Spring 2001 Conference: April 8-11, Exhibition: April 9-10 New York Marriott Marquis, New York City You'll benefit from - * Essential and critical XML training. * Select from multiple tracks, sessions, pre-conference tutorials, Night School Sessions, hands-on workshops and panel discussions. * Comprehensive coverage of enterprise XML and eBusiness technologies and initiatives (ebXML and UDDI). * A world-class faculty including Henry Balen, Jonathan Borden, Ron Bourret, Lee Buck, Kurt Cagle, Alex Chaffee, Mark Colan, Roger Costello, Paul Cotton, Bob DuCharme, John Evdemon, Beth Gold-Bernstein, Molly Holzschlag, Benoît Marchal, Jim Melton, JP Morgenthal, Steve Muench, Gavin Nichol, Ken North, David Orchard, Jonathan Robie, Michael Rys, Gerry Seidman, Matt Sergeant, Aaron Skonnard, Simon St. Laurent, James Tauber, Tommie Usdin, and many others. * Two-day expo showcasing bleeding edge XML tools and services You'll be joined by fellow Internet Technology Developers, XML Experts and Enthusiasts, including: * Programmers, developers, engineers * Software Architects/System Engineers * Web Developers * Product Managers/Project Leaders * Consultants/Educators For conference registration and a Free Exhibit Pass visit http://www.xmldevcon2001.com ***DSIID60342<zope(a)zope.org>***

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Including remote html-pages on a Zope server (with extracting of the title and body of the remote page)
by Pieter Biemond 16 Feb '01

16 Feb '01

Hello, I'm currently trying to setup a Zope server within our company. Our current intranet is based on a static Apache server, and frames are used for navigation. I would like to get rid of the frames and convert them to HTML-tables. Because I first need to show the concept, and get the new server up and running, I need a script which can insert the contents of an external HTML-page (our old server) into a cell of the table if there is no corresponding file on the Zope-server. Examples: http://zope.foo.org/ (the new zope server) http://zope.foo.org/somepage_html (a DTML-file on the zope server, no external HTML-page needed) http://zope.foo.org/apachedoc.html (a file which doesn't exist on the Zope server, but which does exist on http://oldserver.foo.org/apachedoc.html. The Zope-server should retrieve http://oldserver.foo.org/apachedoc.html (using httplib) and should put the body of the file in a HTML-cell. I found a very usefull Howto at http://www.zope.org/Members/cba/Get_External ("How-To: Including the contents of an external HTML page") and tried to get my script working by using the standard_error_message (Yes, I know it's uggly). Questions: a) has anybody done something like this before? b) is there a neat solution for inserting a Python/DTML-script before standard_error_message gets executed? c) if I got the script working I would like to extract the title and body out of the remote page. I found an XML-suite, http://www.4suite.org/, but I doubt how it will work with non-valid HTML-pages (which unfortuately exist on our old server). Does anybody got some pieces of Python/DTML for this job? I'm fairly new with Zope/Python/DTML so any help would be appreciated. Regards, Pieter Biemond

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Zclass
by Rubinstein Fredrik 16 Feb '01

16 Feb '01

Hi there. I have built a small application starting out from the "Searchable jobboard example". Everything is now up and running. However I want to build a form that deletes objects of my own class. Does anyone out there have an good example of this. Which functions to call, wich permission need to be set and so on. With kind regards. Fred R.

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