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Collector issue #30: Empty dates
by Lennart Regebro 19 Mar '02

19 Mar '02

http://collector.zope.org/Zope/30 What are people take on empty dates? Today I can find no way to enter empty dates (I think "None" worked before, but it doesn't work in 2.5.1b1 anyway). This is a problem, because we need to be able to have empty dates. Also, enetering something magick (like None, or 1980/0/0 isn't usable. We fix this with this simple patch, which so far has caused us no problems: from ZPublisher import Converters def fixedfield2date(v): from DateTime import DateTime if hasattr(v,'read'): v=v.read() else: v=str(v) if v=='': return v return DateTime(v) Converters.field2date = fixedfield2date Converters.type_converters['date'] = fixedfield2date It's the "if v=='': return v" part that does it. This makes it possible to enter empty strings as dates. We then handle these as unset dates. Seems to work fine as far as we can see. I was told that this had some type of compatibility issue. If thats the case, how do you suggest we fix it? Best Regards Lennart Regebro Torped Strategi och Kommunikation AB

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A thought for 2.6 about various leaks and memory problems
by Adrian Hungate 19 Mar '02

19 Mar '02

For the last few weeks (And maybe longer) I have been seeing lots of messages about zope leaking, the gc crashing and generally, Zope going senile after long runtimes or lots of requests. This was (And I believe still is) a problem for Apache, which they solved by having threads only live for a certain number of calls, then they die and are replaced by newly created threads. I know that with the current ZODB access model, this would be too slow, but is there any way that the opening of the ZODB could be moved to a different thread or earlier, before the fork, so that we could simply kill senile threads without killing the entire shooting match? I'll admit that I don't know enough about the core code to impliment this (And it is not solving the problem, only masking it) but it might be a good way for "the rest of us" to get back working on reliable Zope's while the core guys get the leaks located and plugged. Just a thought Adrian... -- The difficulty of tactical maneuvering consists in turning the devious into the direct, and misfortune into gain. - Sun Tzu

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Re: [Zope-dev] manage frame change
by Anthony Baxter 19 Mar '02

19 Mar '02

>>> seb bacon wrote > But we come back to the point that you may be logged into one of (say) 3 > app servers (ZEO clients) all serving the same domain, no? and on the same box ... :) Anthony

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more on the segfault saga
by Leonardo Rochael Almeida 18 Mar '02

18 Mar '02

<narrator voice="kosh">And so it continues...</narrator> I've finally recompiled all pythonScripts (all scripts and ZCatalog tricks I tried before didn't know how to get the PythonScripts inside the ZClasses. BTW, if anyone is interested, I can send you the scripts I used to recompile all pythonScripts inside ZClasses). But it still segfaults (and it doesn't seem to be any more stable, so there Anthony :-). At least I got a cleaner stupid_log_file, no more "needs recompilation" messages :-) Matthew, thanks for taking the time to gdb the beast with me. Did you come up with any instrumentation I should add to Python or Zope to get what it is that Python is trying to resease twice? If you want, I can arrange a MySQL-less period during production so that we can capture the crash in a cleaner environment. Speaking of instrumentation, since the gremlin seems to be threading related (it stops with '-t 1'), it might be useful to serialize certain parts of the execution path with semaphors, like the path to the restoration or the execution of PythonScripts, the path to the execution of SQL queries, etc. this means running with small locks in certain sections instead of the big '-t 1' lock (which is not really a lock, but you get the picture :-). Cheers, Leo -- Ideas don't stay in some minds very long because they don't like solitary confinement.

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Umask? On Windows 98? Ha!
by Lennart Regebro 18 Mar '02

18 Mar '02

I get this message when starting Zope 2.5.1b1 on Windows 98: 2002-03-18T19:32:15 INFO(0) z2 Your umask of 000 may be too permissive; for the security of your Zope data, it is recommended you use 077 That's rather silly on Windows 98. :-) A couple of questions: - Should that really be 077? That means that the owner can't read the files, but that "other" can! How can that be less permissive? 770 would make sense to me. I usually run z2.py with -u zope, and have zope own the files, and letting nobody else do scrap with them, 700, in other words. WHy would 077 be better? - Is it silly to check for Windows? What happens on Windows NT, does that emulate umask somehow, or do you get 000 there too?

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Asia To USA Shipping Rates
by service＠freight-calculator.com 18 Mar '02

18 Mar '02

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where is Zope 2.5.1?
by Andrew Sydelko 18 Mar '02

18 Mar '02

I'm curious as to what is holding up Zope 2.5.1? 2.5.1b1 has been out for quite a while now (in Zope time). --andy.

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Zope 2.6 planning - call for contributors!
by Brian Lloyd 18 Mar '02

18 Mar '02

Hi all - Paul sent a note to zope-coders some time back fishing for some feedback regarding planning for a Zope 2.6 (excepted): > I propose that planning for a 2.6 focus on the following thoughts: > > 1) This release is more about community-contributed work than > ZC-contributed work. > ... > > Ultimately the things that go in 2.6 will be governed by what people in > the community are willing to contribute. > > So far the extent of contributions has been minor. Do we need to widen > the pool? Or do we instead try to get new contributors on the > Zope3 track? There wasn't much response to this when it was originally posted. Now that 2.5.1 is nearly out the door, it's time to start planning for a Zope 2.6. I've started a 2.6 plan on the dev site at: http://dev.zope.org/Resources/zope_260_plan.html I wholeheartedly agree that 2.6 needs to be significantly a community effort. While I know that many people are engaged in the Zope 3 effort, we also need to get some people engaged on defining and producing 2.6 in the interim. There is not much on the plan right now, so the possibilities are relatively wide open :) Let's get a discussion started to define 2.6. Brian Lloyd brian(a)zope.com Software Engineer 540.361.1716 Zope Corporation http://www.zope.com

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Large File Support
by Florent Guillaume 18 Mar '02

18 Mar '02

Just a heads up, for people who're not sure: None of the Linux binary downloads of Zope I've tested (including 2.5.1b1) are built with Large File Support in python. Also unstable Debian's python is without Large File Support, same thing with Mandrake 8.1. If you want to check for yourself your python, several methods: bin/python -c "import os; os.lseek(0, 1L<<33, 0)" This should give you an OSError. If you get an OverflowError you don't have Large File Support. nm bin/python | grep lseek This should show you at least one "lseek64". If your python uses a libpython.so, check using: objdump -T /usr/lib/libpython2.1.so.0.0 | grep lseek You should seek a "lseek64" here. HTH, Florent -- Florent Guillaume, Nuxeo (Paris, France) +33 1 40 33 79 10 http://nuxeo.com mailto:fg@nuxeo.com

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Question on Properties
by Andre Schubert 18 Mar '02

18 Mar '02

Hi all, i have question on the long, int and float properties. I'am working with these properties and found out that there is no way to represent them as None or NULL values. I'am working with sql and these properties and it is a good idea if the these properties can be represented as NULL or None values because a column in a database of type int could also be NULL(None in python). Thanks

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