June 2003 - Zope-Dev

ZCTextIndex Improvements
by Casey Duncan 05 Jun '03

05 Jun '03

For the past few days I have been working on database conflicts stemming from ZCTextIndex (no pun intended). The version currently released causes conflicts for *any* concurrent index/unindex operation. I have changed both the lexicon and index classes to fix this. Now conflicts coming from the BTrees are the only ones you will get, and they are internally resolved in most cases. Also, there was a bug in the query machinery that made it far more expensive for large indexes then it needs to be. This has also been fixed. These improvements have now landed on the Zope head and 2.6 branch (soon to be 2.6.2 beta 3 I think). Any of you running Zope in production with any amount of write concurrency should benefit. I ]encourage you to test the new ZCTextIndex code with your applications (in a test environment of course). You should be able to simply replace the ZCTextIndex product in your zope with the one in CVS (no reindex is necessary). I would certainly appreciate any feedback you might have on it. Please note, that the code does make some minor data structure changes to the index and lexicon the first time they are updated. Therefore you cannot simply remove the new product and go back to the old one by swapping the code. You will need to rebuild your Lexicons and ZCTextIndexes to go back. The hope though, is that you'll never want to ;^) -Casey

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Zpydoc
by alan milligan 05 Jun '03

05 Jun '03

Guys, As you may recall, I made a posting regarding this Zope-specific pydoc tool over a week ago. Since then there has been half a dozen downloads, but I am yet to receive any feedback :( I know that documentation is about as exciting as a really unexciting thing, but would like just five minutes from Zope Corporation (and anyone else whose interested...) to at least suggest this effort is misguided and/or has no place in the larger documentation framework of Python/Zope. Again, you can have a quick spin on the demo at http://www.last-bastion.net/Zpydoc. I look forward to a critique. Regards, Alan _________________________________________________________________ Gaming galore at http://xtramsn.co.nz/gaming !

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Problems with archetypes running on plone in zope
by nagendra prasad 05 Jun '03

05 Jun '03

Hi , i have installed plone rpm on rh8 linux, Apparently zope, cmf also got installed which i really needed.Later installed archetypes in plone. Now when i use any of the archetypes stuff like Archetypescontent example, tool i get the following error on clicking the view tab. ----------------------------------------- Site Error An error was encountered while publishing this resource. ImportError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 150, in publish_module Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 114, in publish Module Zope.App.startup, line 182, in zpublisher_exception_hook Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Products.Archetypes.ArchetypeTool, line 490, in manage_addSchema Module Products.Archetypes.ArchetypeTool, line 192, in __init__ Module Products.Archetypes.ArchetypeTool, line 203, in compileSchema Module <string>, line 1, in ? ImportError: No module named -------------------------------------- what is the problem.plz help me thanks prasad ________________________________________________________________________ Missed your favourite TV serial last night? Try the new, Yahoo! TV. visit http://in.tv.yahoo.com

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Re: [Zope-dev] Zpydoc
by Terry Hancock 05 Jun '03

05 Jun '03

On Wednesday 04 June 2003 07:16 pm, alan milligan wrote: > Personally, I am a bit sceptical about the whole Interface concept. > Fortunately because Python supports multiple inheritance, it's not like the > Java mechanism. But it strikes me as being much too like the concept of a > pure abstract base class in C++. But the reality is that this almost never > happens, and it always seems like a good idea to start using this class for > common methods. I do not have a problem with this and think that just > declaring a function gives you little benefit when you could provide a > definition as well - even a 'raise AssertionError, 'Implement me!' seems > more useful :) I think it depends on what they are used for. In my situation, I am defining objects that future 3rd party developers will likely have to subclass. But what methods and attributes do I promise to keep, and which do I plan to alter at need? Also, the interface concept allows me to specify what an object *behaves like* -- not what it *is*. Right now if I subclass from Folder, it isn't easy for me to tell this with introspection -- I have to *know* that a "Topic" is just an extended Zope folder. Interfaces will allow me to simply say that "Topic implements a Folder interface". Then it's easy to tell whether I can call certain methods on it. The "metatype" concept just isn't good enough for this, and inspecting __bases__ is too complicated. Anyway, what if I *don't* subclass from Folder? Maybe I just implement all the same methods. Interfaces lets me just say what it does in an unambiguous way. And since it's in the code, and there is a mechanism for checking that the interface is implemented (in fact I'm thinking of building in such a check into my installation process), this is a nice arrangement. The thing to realize is that interfaces are self-checking documentation, not code. Well, so far, they seem really nice, anway. Cheers, Terry -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com

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problem locking up the db
by chasee 04 Jun '03

04 Jun '03

Hi: I got this error, when starting the Zope server again. I have had this problem before, then I found out there was another processing I did not kill still running the server. this time, I made sure I had no other processes that are running the server or making use of any files in Zope. Please help! File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/z2.py, line 582, in ? File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/__init__.py, line 46, in startup (Object: startup) File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/App/startup.py, line 51, in startup File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/FileStorage.py, line 226, in __init__ File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/lock_file.py, line 33, in lock_file StorageSystemError: Could not lock the database file. There must be another process that has opened the file. --------------------------------- Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo.

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problem locking up the db
by chasee 04 Jun '03

04 Jun '03

Hi: I got this error, when starting the Zope server again. I have had this problem before, then I found out there was another processing I did not kill still running the server. this time, I made sure I had no other processes that are running the server or making use of any files in Zope. Please help! File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/z2.py, line 582, in ? File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/__init__.py, line 46, in startup (Object: startup) File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/App/startup.py, line 51, in startup File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/FileStorage.py, line 226, in __init__ File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/lock_file.py, line 33, in lock_file StorageSystemError: Could not lock the database file. There must be another process that has opened the file. --------------------------------- Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo.

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DBtab and BDBStorage
by Andrew R. Halko 04 Jun '03

04 Jun '03

Hello Fabio, I read your post at: http://zope.nipltd.com/public/lists/dev-archive.nsf/AGByKey/35A02E5C64B9 3519 about DBtab and BDBStorage. I am interested in doing the same thing. I have a Plone site that I expect to become very large and I need to find some other solutions than ZODB and its 2GB limit. Do you think you could help me with figuring this out? I have been reading documentation, posts and everything else and am a little confused. Here are a few questions I have from reading your post. 1. What did you need to install to make this work and did you do it after you already had a Plone/Zope site going? 2. What is the code that goes in DBtab.conf, I read through it about 10 times and can't understand how I need to set it up? 3. Do you have to create a new DB manually every time you want to separate info, is there no way to setup so that it dynamically adds as you need space. 4. I read a little on BerkleyDB Storage, does that give more space than ZODB? Thanks for any help on this that you can give. There should be a tutorial on this somewhere; it seems like something a lot of people would be interested in. A 2GB limit is just horrible. Thanks! Andrew R. Halko

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Login problems
by nagendra prasad 04 Jun '03

04 Jun '03

Hi, We have installed zope-2.6.2b2-1.i386.rpm downloaded from zope.org. we have used red-carpet (ximian product) to install the zope on red hat 8 linux . But we r unable to login, coz, redcarpet takes care of the complete installation process, including the choice of uname & pwd. We have followed the steps in security.txt & the details in http://www.zope.org/Documentation/Books/ZopeBook/current/Security.stx HOw ever , we are unable to login. We are also unable to find either inituser or access file in zope's root folder. Plz help us to resolve this. Thanks Prasad ________________________________________________________________________ Missed your favourite TV serial last night? Try the new, Yahoo! TV. visit http://in.tv.yahoo.com

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Conflict Errors; how to track them down?
by Bjorn Stabell 04 Jun '03

04 Jun '03

Hi all, Except for SARS, another problem that's been plagueing us for months are seemingly random Conflict Errors. We see about 10 every day on our Zope 2.6.1, and they can happen on any page. In most cases they are not related to pages that actually updated anything (AFAIK), although we do use SESSIONS (but no frames). Any clue how to track down which objects are having problems, what's causing this? ------ 2003-06-03T09:08:10 INFO(0) ZODB conflict error at /VirtualHostBase/http/www.beijingsammies.com:80/sammies/VirtualHostRoot/ (7 conflicts since startup at 2003-06-02T13:15:05) ------ I volounteer to write up a HOWTO document regarding this and the "Bad reference to" errors we're also getting (see previous post) if I can just find out what's wrong. Regards, -- Bjorn

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"Bad reference to" ... how to find object references?
by Bjorn Stabell 03 Jun '03

03 Jun '03

Hi all, During packing, we're seing errors such as the ones attached below. Can someone give a description how to track down which objects have these broken references? Such help would be much appreciated... ------ 2003-06-03T00:55:26 ERROR(200) ZODB FS FS21 ERROR: Bad reference to ('\x00\x00\x00\x00 \x00\x0b\x9e\xb7', '') ------ 2003-06-03T00:55:27 ERROR(200) ZODB FS FS21 ERROR: Bad reference to ('\x00\x00\x00\x00 \x00\x0b\x9e\xb8', '') ------ 2003-06-03T00:55:27 ERROR(200) ZODB FS FS21 ERROR: Bad reference to ('\x00\x00\x00\x00 \x00\x0b\x9fy', '') ------ Bye, -- Bjorn Stabell

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