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Conflict errors on startup, revisited
by Paul Winkler 25 Feb '05

25 Feb '05

This is a topic that comes up occasionally, but since the symptom seems to be rare and hard to provoke, it never gets resolved. Well it's biting me again and I'm determined to fix it, but would like some input from the list. Related collector issues: http://www.zope.org/Collectors/Zope/300 http://www.zope.org/Collectors/Zope/1201 The issue: On rare occasions I have seen ConflictErrors raised during product installation. Today, I can finally provoke them at will with a pretty minimal setup. The setup: Zope 2.7.3, using ZEO, with DirectoryStorage on the ZEO server. Hardware: dual-processor PIII 800, some kinda scsi disk, ext3, some old redhat flavor of linux. To provoke it I need merely do ./bin/zopectl run foo.py ... where foo.py is empty. Products/ now contains only one dummy product, which I've named Conflictor, which contains only an empty __init__.py. I get a ConflictError during registration of Conflictor. Interestingly I can only provoke this ConflictError in this particular INSTANCE_HOME. I have several other instances and am not seeing the symptom there. I started trivially hacking OFS/Application.py to add some debugging output (a diff against 2.7.3 is attached), and here's what I get: [pwinkler@dev-zope-knox01 PaulMiniInstanceHome]$ ls Products/ [pwinkler@dev-zope-knox01 PaulMiniInstanceHome]$ mkdir Products/Conflicter [pwinkler@dev-zope-knox01 PaulMiniInstanceHome]$ touch Products/Conflicter/__in it__.py [pwinkler@dev-zope-knox01 PaulMiniInstanceHome]$ touch foo.py [pwinkler@dev-zope-knox01 PaulMiniInstanceHome]$ ./bin/zopectl run foo.py installing product PluginIndexes...OK! installing product Conflicter... BZZT Traceback (most recent call last): File "<string>", line 1, in ? File "/usr/local/lib/python2.3/site-packages/PIL/__init__.py", line 51, in app File "/usr/local/lib/python2.3/site-packages/PIL/__init__.py", line 47, in startup File "/zope/Zope-2.7.3-SoftwareHome/lib/python/Zope/App/startup.py", line 96, in startup File "/zope/ZopeSoftwareHome/lib/python/OFS/Application.py", line 279, in init ialize initializer.initialize() File "/zope/ZopeSoftwareHome/lib/python/OFS/Application.py", line 306, in init ialize self.install_products() File "/zope/ZopeSoftwareHome/lib/python/OFS/Application.py", line 561, in inst all_products return install_products(app) File "/zope/ZopeSoftwareHome/lib/python/OFS/Application.py", line 597, in inst all_products folder_permissions, raise_exc=debug_mode) File "/zope/ZopeSoftwareHome/lib/python/OFS/Application.py", line 803, in inst all_product get_transaction().commit() File "/zope/Zope-2.7.3-SoftwareHome/lib/python/ZODB/Transaction.py", line 252, in commit File "/zope/Zope-2.7.3-SoftwareHome/lib/python/ZODB/Connection.py", line 738, in tpc_vote File "/zope/Zope-2.7.3-SoftwareHome/lib/python/ZEO/ClientStorage.py", line 841 , in tpc_vote File "/zope/Zope-2.7.3-SoftwareHome/lib/python/ZEO/ClientStorage.py", line 825 , in _check_serials ZODB.POSException.ConflictError: database conflict error (serial this txn starte d with 0x035b25f36751f988 2005-02-10 18:59:24.215675, serial currently committed 0x035b743c6d186822 2005-02-24 17:00:25.569220) I guess what I'm asking, before I hack more on OFS/Application.py, is this: * any ideas re. what on earth could be causing this ConflictError? the product doesn't DO anything fer chrissakes. (Maybe registration is finishing too fast??) * Is the PIL stuff in the traceback a red herring or what? -- Paul Winkler http://www.slinkp.com

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Re: [Zope-dev] zope and python2.3.5
by Radosław Stachowiak 24 Feb '05

24 Feb '05

On Mon, 21 Feb 2005 21:08:01 +0100, Andreas Jung <lists(a)andreas-jung.com> wrote: > > zope-2.7.4 and zopex3-3.0.0 stops 'configure' with error on python 2.3.5. > > is it safe to force zope to use python 2.3.5 instead of 2.3.4 ? > > It does *not* force you to use 2.3.4. There is a --with-python option if > you look carefully at the configure options. At the time of Zope 2.7.4 release there > was no Python 2.3.4. That's why you can't expect support for Python 2.3.5. I wrote about forcing zope, not forcing me :) as for the option, as i wrote before we will use this approach. Maybe zope configure shouldnt stop on newer, but from the same branch, version of python? -- radoslaw.

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Announce: February Zope Bug Day!
by Chris Withers 22 Feb '05

22 Feb '05

Hi All, My my how time flies ;-) It's the end of February and that means another bug day. I'll probably be a little busy, but I'll be trying to squash at least a few bugs... What? Zope Bug Day working from http://www.zope.org/Collectors/Zope When? Friday 26th February - from when you wake up until when the day ends! Where? #zope-dev on irc.zope.org Come along and help if you've got a chance! Read this if you want to know how: http://www.zope.org/DevHome/CVS/BugDays cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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zope and python2.3.5
by Radosław Stachowiak 21 Feb '05

21 Feb '05

Hello zope-2.7.4 and zopex3-3.0.0 stops 'configure' with error on python 2.3.5. is it safe to force zope to use python 2.3.5 instead of 2.3.4 ? i ask, because, on possitive answer, we (Gentoo Linux) change default zope installation to use python2.3.5 At present default python on Gentii from 2.3 branch is 2.3.4 but it will be replaced by 2.3.5 in some time, leading to broken zope installs on gentoo. looking forward your opinions. -- radek(a)gentoo.org.

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QueueCatalog Tool Inadvertantly Triggers Indexing
by Ken Wasetis 21 Feb '05

21 Feb '05

I've recently installed QueueCalalog (with PloneQueueCatalog) and either I don't understand how it is intended to work (lacks documentation), or it isn't working the way it's intended to. My objects, which are similar to the ATFile content type of Archetypes, have PDF or MS Word files attached and bog down Zope if indexing is done on the SearchableText index for these immediately, while users are logged in and doing work during the day. When I configure QueueCatalog to select all of my indexes except SearchableText as ones that should update immediately, it seems to successfully queue a new first object I've created in Plone (and not convert and index the object by doing a portal_transform on its 'file' attachment attribute. This is fine for the first object, but as soon as I attempt to create a second such object, the queue gets processed. The way I understand queue processing is, there are two things that would trigger the processing of the queue: 1) A site manager logs into the ZMI, goes to the portal_catalog's Queue tab and clicks the 'Process' button. 2) The Process class of the QueueCatalog product is a thread and (by default) is hardcoded to sleep for 60 seconds at a time. When it wakes up, it will process the queue. With that in mind, I modified the Process.py to increase the interval fro 60 to 6000 seconds, but my queue still gets immediately processed upon the creation of a second object. Is this a bug, or am I misusing or misunderstanding the tool's design? Thanks in advance for any help - I couldn't find any good pointers on how to use the product. Ken Wasetis SPR Inc. kwasetis(a)sprinc.com

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method attribute __roles__ in Zope 2.8
by Andreas Jung 21 Feb '05

21 Feb '05

I can across the following problem while trying to fix the broken FTP service for Zope 2.8: ObjectManager.manage_FTPstat() tries to access self.manage_FTPlist.__roles__ whose value is ('Manager',') in Zope 2.7. In 2.8 this attribute is not available. Can someone explain how and where is attribute in set Zope 2.7 and why it is no longer available in Zope 2.8 (has it anything to do with new-style classes in 2.8). Being-completely-clueless, Andreas

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Patch for attribute permisions problems in Zope 2.7.3
by Santi Camps 21 Feb '05

21 Feb '05

Hi all again, We have been written last week about some attribute permission problems with Zope 2.7.3 beta due to a patch applied by Tres. First of all, Tres, apologies for my too fast written test case and my too late test of Zope 2.7.3. Now, with some more time, I've tested and debugged on Zope 2.7.3 and found exactly what's happen. Supose we have a structure of objects like this: A.__of__(B) "A" inherits from Acquisition.Implicit, has security assertions, but has not __allow_access_to_unprotected_subojects__ We want to access, from a Zope Page Template, an attribute of "B" that is not present in "A" Accessing B.our_attribute attribute works fine. But accessing A.__of__(B).our_attribute fails, and should work. The problem is the call to "validate" done in "guarded_getattr" method of ImplPython.py. The actual call is "if validate(inst, inst, name, v)", but the validate function says: Arguments: accessed -- the object that was being accessed container -- the object the value was found in name -- The name used to access the value value -- The value retrieved though the access. roles -- The roles of the object if already known. Now, "accessed" and "container" are always the same, and in some cases should be different. I attach a patch to solve this case that works for me. I'm not sure if my code is the best way to solve the problem but, as I said, it seems to work fine. Of course, If the patch is accepted, the same change should be done in the C version. Thanks Santi Camps http://www.earcon.com --- ImplPython.py 2004-08-07 19:15:48.000000000 +0200 +++ /usr/local/zope273/lib/python/AccessControl/ImplPython.py 2004-10-29 10:56:11.000000000 +0200 @@ -534,6 +534,12 @@ # exceptions are caught early. try: v = getattr(inst, name) + container = inst + while hasattr(container,'aq_explicit') and \ + not(hasattr(container.aq_explicit, name)) and \ + hasattr(container, 'aq_parent'): + # Find real container when attribute is acquired + container = container.aq_parent except AttributeError: if default is not _marker: return default @@ -551,6 +557,6 @@ return v validate = SecurityManagement.getSecurityManager().validate - if validate(inst, inst, name, v): + if validate(inst, container, name, v): return v raise Unauthorized, name

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guarded_getattr
by Stefan H. Holek 17 Feb '05

17 Feb '05

Tres, I'd very much appreciate your opinion on http://mail.zope.org/pipermail/zope-dev/2005-January/024237.html http://mail.zope.org/pipermail/zope-dev/2005-January/024242.html Plone is breaking left and right and I gotta do something about it... Thanks, Stefan -- The time has come to start talking about whether the emperor is as well dressed as we are supposed to think he is. /Pete McBreen/

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code coverage
by Florent Guillaume 17 Feb '05

17 Feb '05

In test.py there's currently a -T option that enables code coverage using the trace module. Are many people using it ? We'd like to work on including in test.py different coverage methods and outputs in Zope by making it interface with coverage.py from http://www.nedbatchelder.com/code/modules/coverage.html Anyone thinks it could be problematic ? Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of R&D +33 1 40 33 71 59 http://nuxeo.com fg(a)nuxeo.com

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zopeXMLMethods and Zope 2.7.x
by Francois-regis.Chalaoux＠sanofi-aventis.com 16 Feb '05

16 Feb '05

Hi All, It seems that zopeXMLMethods and Zope 2.7.x do not work correctly together. In fact, installed xml processors are not visible from ZopeXMLMethods object in ZMI (blank list). Personaly I use 4Suite 1.0a4 as processor. Everything work with Zope 2.7.2 but since Zope 2.7.3 every fail. Have you this problem, solutions ? I've patched zopeXMLMethods with the december proposition of zope mailing-list with no succes then the Thread stopped. FR. ---------------------------------------------------------- Le présent message ainsi que ses éventuelles pièces jointes est exclusivement destiné au(x) destinataire(s), personnes physiques ou morales, qu'il désigne. Il constitue de ce fait une correspondance à caractère privé et peut contenir des informations confidentielles. Si ce message vous est parvenu par erreur, nous vous remercions d'en aviser immédiatement l'expéditeur par retour de courrier électronique puis de le détruire, ainsi que ses éventuelles pièces jointes, sans en conserver de copie. This message, including any attachment, is intended for the use of the individual or entity to which it is addressed. It is therefore to be considered as a private correspondence which may contain confidential information. If you are not the intended recipient, please advise the sender immediately by reply e.mail and delete this message and any attachment thereto without retaining a copy. ----------------------------------------------------------

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