November 2004 - Zope

RE: [Zope] Left Menu (Frame) on ZMI not displaying
by Paul Sue 15 Nov '04

15 Nov '04

Chris McDonough wrote: >Sounds like a symptom of the treeframe code attempting to traverse a >folder with an inordinate number of things in it (maybe nested deeply). >Do you have such a folder? No, there's not much of anything as it's a new install with just a few folders >Is there anything in the event log? Nope .. I even tried rebooting the box itself, but still no go. Weird! Paul

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RE: [Zope] Left Menu (Frame) on ZMI not displaying
by Paul Sue 15 Nov '04

15 Nov '04

Hi, >Paul, > >Please don't post mail here in HTML. oops, sorry about that! >Maybe your tree state cookie got hosed. Try clearing out your cookies >and revisiting the site. tried that but still NOT displaying, browser just chugs away a long time and times out .. I did notice this in the log: "GET /ssoi/manage_workspace HTTP/1.1" 302 370 "http://mike:8080/manage_main" On Mon, 2004-11-15 at 02:45, Paul Sue wrote: > Hi, > > Suddenly, the left frame refuses to display .. I've tried restarting > Zope to no avail .. I can login to the site as normal user. I see no > errors in the logs. > > What the @#$!% is going on??? > > argh ...... :( > > Paul

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Migration problems
by John Poltorak 15 Nov '04

15 Nov '04

I spent some time looking at Zope several months ago but because of the steep learning curve gave it a rest after a week or two, but would like to get back to where I left off. Unfortunately I seem to be unable to access ZODB now after having upgraded Python, Zope, CMF and Plone. I presume I need to migrate whatever objects I built previously to the new environment... Is there any guide to doing this? Here is the sort of error I get when trying to start Zope:- Traceback (most recent call last): File "/usr/local/zope/lib/python/Zope/Startup/run.py", line 49, in ? run() File "/usr/local/zope/lib/python/Zope/Startup/run.py", line 19, in run start_zope(opts.configroot) File "/usr/local/Zope/lib/python/Zope/Startup/__init__.py", line 51, in start_zope starter.startZope() File "/usr/local/Zope/lib/python/Zope/Startup/__init__.py", line 230, in startZope Zope.startup() File "/usr/local/Zope/lib/python/Zope/__init__.py", line 45, in startup from Zope.App.startup import startup as _startup File "/usr/local/Zope/lib/python/Zope/App/startup.py", line 30, in ? import OFS.Application File "/usr/local/Zope/lib/python/OFS/Application.py", line 18, in ? import Globals,Folder,os,sys,App.Product, App.ProductRegistry, misc_ File "/usr/local/Zope/lib/python/App/Product.py", line 44, in ? from HelpSys.HelpSys import ProductHelp File "/apps/zope/lib/python/HelpSys/__init__.py", line 15, in ? import HelpSys File "/apps/zope/lib/python/HelpSys/HelpSys.py", line 18, in ? from Products.ZCatalog.ZCatalog import ZCatalog File "/usr/local/zope/lib/python/Products/ZCatalog/__init__.py", line 16, in ? import ZCatalog, Catalog, CatalogAwareness, CatalogPathAwareness, ZClasses File "/usr/local/Zope/lib/python/Products/ZCatalog/ZCatalog.py", line 29, in ? from Catalog import Catalog, CatalogError File "/usr/local/Zope/lib/python/Products/ZCatalog/Catalog.py", line 17, in ? from MultiMapping import MultiMapping ImportError: filename doesn't match module name Where do I start in trying to sort this out? -- John

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OrderedFolder broken (by old-style OrderedFolder?)
by Lee Harr 15 Nov '04

15 Nov '04

When using Zope-2.6, I had a separate OrderedFolder product installed... Now I notice that 2.7 has a built-in OrderedFolder. I can see "Folder (Ordered)" in my product add list, and I can add an OrderedFolder instance to my site, but it does not have the order controls inside. In my log file, I am seeing : 2004-11-13T06:37:49 PROBLEM(100) ZODB Could not import class 'OrderedFolder' from module 'Products.OrderedFolder.OrderedFolder' That product is no longer installed. I tried going in to the control panel and uninstalling it there, but I continue to get the same error in the log. Any hints on how to clean this up? My only thought is to re-install the old OrderedFolder class, but I would prefer to move on to the standardized Zope ordered folder. Thanks for any help. _________________________________________________________________ Don't just search. Find. Check out the new MSN Search! http://search.msn.com/

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about plone
by naveen＠prajasakti.com 15 Nov '04

15 Nov '04

hey guys i got a problem. if any one knows solution please get back to me i added a new folder using ZMI to my plone portal. now the problem is i'm not able to access the folders inside this folder in heirarchy. please give a solution of how can i link this folder to my plone portal.with out actually adding all these folders inside my plone site. reply me at naveenmudunuru(a)yahoo.co.in naveen(a)prajasakti.com

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problem with apache virtualhost
by Alvaro Jesus Hernandez Arteaga 15 Nov '04

15 Nov '04

Hi * I setup a Zope with apache 2.0.48 on Mandrake 10.0 my virtualhost file on apache is <VirtualHost 10.0.0.5:80> ServerName reducnew.uc.edu.ve ProxyPass / http://10.0.0.5:9080/VirtualHostBase/http/reducnew.uc.edu.ve:80/reduc.uc.ed… ProxyPassReverse / http://150.0.0.5:9080/VirtualHostBase/http/reducnew.uc.edu.ve:80/reduc.uc.e… ErrorLog /reduc/www/log/reducnew-error.log TransferLog /reduc/www/log/reducnew-access.log ProxyVia on RewriteEngine on RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK) RewriteRule .* -[F] </VirtualHost> but I don't access my zope site in my log error have client denied by server configuration: proxy:http://10.0.0.5:9080/VirtualHostBase/http/reducnew.uc.edu.ve:80/reduc.uc.edu.ve/VirtualHostRoot/ Thank you in advance -- Alvaro Jesús Hernández Arteaga alhernan(a)uc.edu.ve RedUC - Universidad de Carabobo Valencia, Edo. Carabobo Venezuela

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AW: [Zope] Zope and IIS6.0 (Windows 2003 server)
by volker.wend＠efgbsh.de 15 Nov '04

15 Nov '04

Hi, http://freshlogic.net/ IIS2Zope works fine with IIS and Zope / Plone with VHM and is free. Regards, Volker -----Ursprüngliche Nachricht----- Von: zope-bounces(a)zope.org [mailto:zope-bounces@zope.org] Im Auftrag von Tino Wildenhain Gesendet: Sonntag, 14. November 2004 14:16 An: Garito Cc: Lista Oficial de Zope Betreff: Re: [Zope] Zope and IIS6.0 (Windows 2003 server) Hi, Am Sonntag, den 14.11.2004, 12:08 +0100 schrieb Garito: ... > > > >Well, Apache is available for Windows as well, so you can put Apache > >as reverse Proxy in front of both IIS and Zope. Does not cost a cent > >and is very flexible. > > > Hi > Yes I think in these solution but I thinks is a little complicated 3 > servers I cross my fingers to find some good solution like in linux with apache etc. > Perhaps is time to apache Well Apache in front of IIS also helps to protect IIS. And if 3 servers scare you, maybe you can get rid of IIS ;)) Regards Tino _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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Left Menu (Frame) on ZMI not displaying
by Paul Sue 15 Nov '04

15 Nov '04

Hi, Suddenly, the left frame refuses to display .. I've tried restarting Zope to no avail .. I can login to the site as normal user. I see no errors in the logs. What the @#$!% is going on??? argh ...... :( Paul

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RE: [Zope] How to handle ZODB conflict errors
by Sean Hastings 15 Nov '04

15 Nov '04

The slowdowns result when various transactions are trying to modify the same data. When a conflict happens, one of the transactions is rolled back and attempted again from the beginning. If the transaction takes a long time to execute, and this happens many times, the delays can be considerable. Only after some number of attempts, with continuing conflicts occurring, will the transaction give up and allow the Conflict Error to actually be raised back to the level of producing an error page, but each one will be logged in your event.log file. I wrote the following to explain conflicts to my own satisfaction: ------------------------------------------------------------------- There are two types of conflict errors: Read Conflict: -------------- Transaction 1 reads object A. Transaction 2 modifies object B. Transaction 1 attempts to read object B, but notices that object B has been modified since Transaction 1 began to read data. Since the data it read from A, and the data that it now finds in B are not necessarily consistent, a Read Conflict Error is produced. Transaction 1 rolls back and restarts. Write Conflict: --------------- Transaction 1 reads object A. Transaction 2 modifies object A. Transaction 1 attempts to modify object A, but notices that object A has been modified since it was read. Since overwriting the changes made by Transaction 2 would cause "lost update problems" and possible data inconsistency, a Write Conflict Error is produced. If conflict is not handled (see below), Transaction 1 rolls back and restarts. Solutions: --------- Read Conflicts - If you do not care about consistency during your read, you can execute the statement "get_transaction().commit()" after each new object accessed. This breaks your transactions up into smaller transactions that are MUCH less likely to cause conflicts. I understand that Zope 2.8 (alpha any day now) will eliminate Read Conflicts by including the ability to read old constant states. In the example above, Transaction 1 would then just read the old state of B before Transaction 2 had modified it. Write Conflicts - You can define a method on any ZODB object called "_p_resolveConflict". When a write conflict occurs, the first thing that happens is that Zope tries to call this method to handle the problem, passing it all the possible states of the object: OLD, FOUND, and TRIED. OLD is the state that the transaction first read. FOUND is the new modified state that some other transaction saved the object as. TRIED is the state that the transaction wanted to save the object as when it realized that there was a conflict. This method is intended to return a merged version of the two objects. If you do not care about lost updates, this method could be as simple as: def _p_resolveConflict(self,old,found,tried): return tried ------------------------------------------------------------------- Here is an example of some code that I think works to handle write conflicts in an order independent list. The object in question is a ZODB wrapper for a list. The [] is stored in the "data" element referred to in saved.data, old.data, etc: def _p_resolveConflict(self,old,saved,new): """ Merges two possible list states Accounts only for additions and deletions, not changes of order Prevents duplicate add or remove of same Item during conflict """ #get changes made in saved state saved_added = [] saved_removed = [] for item in saved.data: for i in range(saved.count(item) - old.count(item)): saved_added.append(item) for item in old.data: for i in range(old.count(item) - saved.count(item)): saved_removed.append(item) #get changes made in new state new_added = [] new_removed = [] for item in new.data: for i in range(new.count(item) - old.count(item)): saved_added.append(item) for item in old.data: for i in range(old.count(item) - new.count(item)): new_removed.append(item) #get duplicate changes both_added=[] for item in new_added: if saved_added.count(item): both_added.append(item) new_added.remove(item) saved_added.remove(item) both_removed=[] for item in new_removed: if saved_removed.count(item): both_removed.append(item) new_removed.remove(item) saved_removed.remove(item) #apply changes old.extend(saved_added) old.extend(new_added) old.extend(both_added) for item in saved_removed: old.remove(item) for item in new_removed: old.remove(item) for item in both_removed: old.remove(item) return old

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Startup script for multiple Zope instances
by John Poltorak 15 Nov '04

15 Nov '04

How does anyone handle startup scripts for multiple Zope instances? Should they be started from a single script or should there be one script per instance? -- John

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