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Re: cannot start Zope 2.0.0 alpha 2
by J Kinsley 15 Jun '99

15 Jun '99

I remember getting a similar error awhile back on a CVS version of Zope. The reason was that I forgot to set the DNS_IP in z2.py. Regards, Jarrod Kinsley > On Mon, 14 Jun 1999 19:07:16 -0400, > Jim Fulton <jim(a)digicool.com> said: > > Jim> http://www.zope.org/Download/Releases/Zope-2.0.0a2 > > Something seems wrong here. I can get 2.0a1 to start, but not > 2.0a2, using the exact same procedure. > > tar xvzf Zope-2.0.0a1-src.tgz > cd Zope-2.0.0a1-src > python wo_pcgi.py > chown -R nobody var/ > chgrp -R nobody var/ > python z2.py > > (now can browse Zope on port 9673) > (kill Zope) > > tar xvzf Zope-2.0.0a2-src.tgz > history > cd Zope-2.0.0a2-src > python wo_pcgi.py > chown -R nobody var/ > chgrp -R nobody var/ > python z2.py > > (now cannot browse Zope on port 9673) > > Unhandled exception in thread: > Traceback (innermost last): > File > "/usr/share/Zope-2.0.0a2-src/ZServer/PubCore/ZServerPublisher.py", > line 97, in __init__ > response._finish() > File "/usr/share/Zope-2.0.0a2-src/ZServer/HTTPResponse.py", line > 214, in _finish > self.stdout.close() > File "/usr/share/Zope-2.0.0a2-src/ZServer/HTTPResponse.py", line > 249, in close > Wakeup() > File "/usr/share/Zope-2.0.0a2-src/ZServer/medusa/select_trigger.py", > line 80, in pull_trigger > self.trigger.sendto (msg, self.addr) > socket.error: (13, 'Permission denied') > > My system: > > Linux 2.2 > Python 1.5.2 >

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RE: [Zope] Large Portal requirements (was: Other web servers?)
by Michel Pelletier 15 Jun '99

15 Jun '99

> -----Original Message----- > From: Jimmie Houchin [mailto:jhouchin@texoma.net] > Sent: Monday, June 14, 1999 2:41 PM > To: zope(a)zope.org > Subject: [Zope] Large Portal requirements (was: Other web servers?) > > nto. > > Howabout for database intensive situations like one > encounters in some of > the larger sites like Altavista, Goto, Yahoo, Amazon, etc. > > Here are very, very large databases, probably very large indexes, > multi-millions of objects, multi-multi-gigabytes to search, index. > My concern is because Python does not scale with multiple processor > machines, this limits ones ability to throw hardware at the > situation since > you are limited to the fastest single processor. > In the future, we will be have the client server model of ZODB3 (which will be a commercial product) that lets you have multiple Zope frontend processes (possibly on different machines) accessing multiple database backend processes (possibly on different machines). Also, ZServer is currently multi-threaded, but there is no theoretical limitation to making it multi-process, in which each Zope instance will have it's own Python and thus it's own global Python lock, thus giving the OS the ability to schedule multiple processes among multiple processors, a little heavier than threads on multi-processor, but *vastly* easier to impliment and far more stable. > Do I misunderstand anything. > > Would Zope be appropriate for these situations? How well > would Zope handle it? > > For example in an article I read concerning the delay in > Intel bringing out > it's chipset for 8way Pentium III servers. Barnes and Noble > was talking > about beta-testing an 8way server to speed up their searches. 'Searching' is a whole nother question. If n Zope *processes* are all doing a search through the index at the same time and you have n processors, then each process will complete the operation without blocking each other, if multiple threads do it, then they will block each other. However, multiple processors will not speed up the time it takes to do *one* search, it will just allow multiple searches to be done concurently (which in high load situations makes each individual search look much faster). Getting into the ability break a searching algorithm down into multiple processors is complex and probably only pays off when your talking about searching through *massive* quantities of data. I mean big. If you had a Zope index with one million entries in it, you would, worst case, have to go through 20 comparison operations to find the element your looking for (Zope indexing uses a very efficient binary tree structure to store it's indexes). > > Now I understand that different development models yield > different results > and I don't know how Barnes and Noble's website is built. I > do know that > B&N has a very large database with multi-millions of objects > with many, > many gigs of data. > > Would Zope be appropriate? > Sure, I can see Zope easily scaling to this level. > I know that my website will have similar and greater requirements > concerning database size and searching. Hopefully > hits/traffics also will > be high. > > Zope and Python are my first choice. Cool! You won't be disapointed. -Michel > > Thanks for any help. > > Jimmie Houchin > > [snip] > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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SEMI-ANNOUNCE: Zpdf v0.1 a PDF dynamic document generator
by Pavlos Christoforou 15 Jun '99

15 Jun '99

Hello Zopistas - I have uploaded on my starship account http://starship.python.net/crew/pavlos/ the first stable version of a simple PDF document formatter. It comes with a minimal HTML to PDF converter that supports enough HTML to convert most StructuredText documents. (See Acquisition.pdf in the doc directory). Unfortunately it is too slow to become the basis of a Zope product but it was designed with that goal in mind. If the ZDP folk use well structured html (or just StructuredText) to write the ZDP documents and FAQs we will easily have a relatively good quality documentation ready with not too much effort. Included in the distribution is a patched version of StructuredText.py, which fixes some minor bugs. Pavlos

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RE: [Zope] Re: URGENT: Can't start up zope
by Jay, Dylan 15 Jun '99

15 Jun '99

> -----Original Message----- > From: Jim Fulton [mailto:jim@digicool.com] > Sent: Saturday, June 12, 1999 21:54 > To: Jay, Dylan > Cc: 'zope(a)zope.org'; 'support(a)digicool.com' > Subject: Re: [Zope] Re: URGENT: Can't start up zope > > > "Jay, Dylan" wrote: > > > > > -----Original Message----- > > > From: Michel Pelletier > > > Sent: Friday, June 11, 1999 2:42 PM > > > To: 'djay(a)lucent.com'; zope(a)zope.org > > > Cc: Support > > > Subject: RE: URGENT: Can't start up zope. > > > > > > > > > > > > > > > > -----Original Message----- > > > > From: Dylan Jay [mailto:djay@cse.unsw.edu.au] > > > > Sent: Friday, June 11, 1999 2:29 PM > > > > To: zope(a)zope.org > > > > Cc: support(a)digicool.com > > > > Subject: URGENT: Can't start up zope. > > > > > > > > > > > > I was doing some external method work on our production > > > > server (silly boy) > > > > and something went very wrong. Every time I start zope it > > > > will crash. This > > > > is both as an NT service and using ZHTTPServer. ZHTTPServer > > > > gives a stack > > > > dump that mentions initializing products and factories and stuff > > > > (unfortunatly my office has a power outage currently so I > > > > can't the dump > > > > or the data.bbb until 5 hours or so). Using the bbb.py > it reports no > > > > corruptions so I can only presume the database contains some > > > > configurations that screws up zope. To make matters worse our > > > > expensive > > > > backup solution doesn't seem to have backed up data.bbb. > > > > > > > > > > Can you send us this traceback? Did a power outage occour > > > while the server was running? Did the machine not get shut > > > down properly and this this problem happened? Or did it just > > > happen after a clean shutdown (ie, what was the state of the > > > server before coming up the first time with this error). > > > > No, It occured while testing an external method. > > > > Heres the dump > > > > C:\Program Files\Provision>..\python\python serve.py > > Traceback (innermost last): > > File "serve.py", line 100, in ? > > ZopeHTTPServer.main(args) > > File "C:\Program > Files\Provision\ZopeHTTPServer\ZopeHTTPServer.py", line > > 498, > > in main > > start(module_file,host,port,threading,env) > > File "C:\Program > Files\Provision\ZopeHTTPServer\ZopeHTTPServer.py", line > > 436, > > in start > > set_published_module(module_file,BoboRequestHandler,env) > > File "C:\Program > Files\Provision\ZopeHTTPServer\ZopeHTTPServer.py", line > > 432, > > in set_published_module > > __import__(name) # to catch problem modules right away > > File "C:\Program Files\Provision\lib\python\Main.py", > line 103, in ? > > Bobobase=OFS.Application.open_bobobase() > > File "C:\Program > Files\Provision\lib\python\OFS\Application.py", line 371, > > in > > open_bobobase > > install_products(app) > > File "C:\Program > Files\Provision\lib\python\OFS\Application.py", line 486, > > in > > install_products > > App.Product.initializeProduct(product, product_name, > package_dir, app) > > File "C:\Program > Files\Provision\lib\python\App\Product.py", line 428, in > > init > > ializeProduct > > if old is not None: products._delObject(name) > > File "C:\Program > Files\Provision\lib\python\App\Product.py", line 145, in > > _del > > Object > > for factory in getattr(self, id)._factories(): > factory._unregister() > > AttributeError: _factories > > Change this loop in Product.py to: > > try: > for factory in getattr(self, id)._factories(): > factory._unregister() > except: pass > > The product is broken, so you can't get at it's factories > (or figure out that it has none, in this case. > > > > Now that I've had some time to debug it a little, what I > discover is this. > > The above crash happens while trying to initialize the > MailHost object. The > > reason is that getattr(self,id) in the call above is > actually a DTML object > > not a Factory object. Somehow a piece of code got whacked > in the wrong > > place. > > That seems strange. > > Where was the ExternalMethod you were messing with? > What did it do? Heres the the methods. Its designed so I can not show a link if the user doesn't have permission view it. This will allow things my dynamic site map to be relvent to the current user. from AccessControl.Permission import Permission import string def canViewObj(SomeObject, userRoles): if hasattr(SomeObject,'_View_Permission'): Roles = getattr(SomeObject,'_View_Permission') if 'Anonymous' in Roles: return 1 else: for i in userRoles: if i in Roles: return 1 # ok, try parents if SomeObject.acquiredRolesAreUsedBy('View') != '': return canViewObj(SomeObject.aq_parent, userRoles) else: return canViewObj(SomeObject.aq_parent, userRoles) def canView(self, objName, AUTHENTICATED_USER): return 1 #return AUTHENTICATED_USER.getRoles() objName = 'self.'+string.replace(objName,'/','.') objName = string.replace(objName,'..','.') SomeObject = eval(objName) return canViewObj(SomeObject, AUTHENTICATED_USER.getRoles()) def test(self, objName): #return objName.getRoles() objName = 'self.'+string.replace(objName,'/','.') objName = string.replace(objName,'..','.') SomeObject = eval(objName) if hasattr(SomeObject,'_View_Permission'): return 'blah' return canViewObj(SomeObject,['Customer', 'Developer', 'Manager']) ----------------------- I'm not sure that this caused the problem but it was what I was working on at the time. I have a feeling that the problem may have been caused days earlier. What I think happened is I did something to crash zope and then the problem with initilization surfaced when I tried to reload. I think I even saw something called a principia factory sitting in another section of the site so that and the MailHost must have got transposed. > > > I can now get the site up by removing the MailHost product. > However mail is > > an extermely important part of the site in that no new user > can register > > without it. When a shut it down and add MailHost back in I > get the same > > problem. What I need to do is somehow take out what is posing as the > > MailHost Product. I have no idea how to do this. > > > > I will resend this mail to digicool.com with my database > > I'd definiately like to look at it. > > In the mean time, see if the code change above fixes the > problem. I did something similar before I got this message and managed to fix the problem. I sent my ODB to support(a)digicool.com but its 10M zipped and it bounced. I will forward it to you now.

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RE: [Zope] RE: URGENT: Can't start up zope
by Jay, Dylan 15 Jun '99

15 Jun '99

> -----Original Message----- > From: Paul Everitt [mailto:paul@digicool.com] > Sent: Sunday, June 13, 1999 13:33 > To: Jay, Dylan > Cc: 'zope(a)zope.org' > Subject: Re: [Zope] RE: URGENT: Can't start up zope > > > > "Jay, Dylan" wrote: > > Also is there anyway to reduce the dependence of the main > zope functionality > > on states kept inside the ODB? ie in this case is it > necessary to keep > > Jim made a very good reply, I'll add in a couple more blurbs as well. > > First, you're right, we need to continue doing everything we can to > improve the reliability as well as provide tools for recovery. I can > safely say Jim et al. are _keenly_ engaged on this. But like > security, > reliability isn't one silver bullet, it is a collection of options. > > Thus, we need you and others to keep brainstorming more ways to get > there. > > As for the database itself, IMO there are two issues involved: storage > of the objects and the objects themselves. > > In the first case, the current Zope database is responsible > for managing > records in a file. If something goes wrong, records might > get mangled. > Zope2 will let you have replacement options with other > storage managers > you might trust more, like a gdbm/bsddb file, a relational database, > etc. Zope2 also has a more resilient database format, as well as an > option to partition your object system into multiple storages (thus > minimizing any damage)*. > > In the second case, at the end of the day the object data will be in a > Python pickle. This means that the object data is still > intimately tied > to the application -- which is at the heart of object oriented > programming. Of course the XML import/export of the database helps > mitigate this. > > Thus my question: How much would allowing record storage and > management > in something you might trust (e.g. bsddb) alleviate the black-box > feeling? What your getting at here is true. The storage format is only a small part of the problem. As it turned out in this case it wasn't the format but sematics of the data that was at fault. Having a relational or XML version would not have made a differece. My bad feeling really comes from combining code and data idea. The ZODB is really acting as a repository for code, documents that make up static content of the site and database type information unless you choose to put that in a relation DB. It makes me uneasy to put code and data in the same place. It seems to me that this is what Zope is all about though. What would mitigate the risk is to have a proper encapsulation. External methods are essential however python is not an encapsulated language in the same way something like java is. Encapsulation would prevent bugs interferring with anymore than with what they are supposed to interact with? Is this possible with python? And if not what are the possibilities of moving to a language that does? > Needless to say, the gang here at DC, particularly Jim, are mighty > interested in what you think on the subject. > > * Perhaps the top-level folder in Zope2 should be in its own > storage, so > that changes to sub-subobjects won't be in danger of corrupting it? > Just a thought?

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External methods writting "up" object hierarchy
by jpglutting＠mx3.redestb.es 15 Jun '99

15 Jun '99

I am trying to write an External method that evaluates a multiple- choice exam, and then writes the results into a directory object for the student within the Zope database. I cannot seem to figure out how to access objects that are Parents of the object from which the External method is called. Is this possible? And can this be done on another "branch" of the object heirarchy? For example, if A, and B are subobjects of X, can an External method called in A access B and its sub-objects - and how? (say, manage_changeProperties()). Thanks, JP Montse Rue JP Glutting jpglutting(a)mx3.redestb.es

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RE: [Zope] Is there any plans to combine harvest with catalog?
by Jay, Dylan 14 Jun '99

14 Jun '99

Well, as I understand it, the idea of harvest was to provide standard interfaces to any kind of data. Each site had brokers that did local indexing and exposed an interface to other search engines. This allowed general search engines to index very specific kind of data. Harvest WAS academic stuff and I'm not sure what happened to it. But supporting any such brokering sounds like a good idea to me. > -----Original Message----- > From: Michel Pelletier [mailto:michel@digicool.com] > Sent: Sunday, June 13, 1999 01:12 > To: 'Jay, Dylan'; 'zope(a)zope.org' > Subject: RE: [Zope] Is there any plans to combine harvest > with catalog? > > > Hmm.. I seem to remember Harvest being an old cache project that the > Squid folks picked up on. HTTP Caching and Cataloging the > same problem? > Perhaps I am thinking of something different, or perhaps the harvest > project had more goals than just caching. > > One problem with other cataloging/indexing tools is that they are, at > best, designed to index URLs. This is al find and good, but > we want to > catalog object and their attributes, this is very Zope and Python > specific. htDIG for example, will index all the documents on > your site, > but will it tell you the last document a certain Zope user > modifed was? > Will it give you a list of the 10 most recent news items (how can it > know what are 'news items' without a meta_type?)? Also, with > ZClasses, > you can create your own objects and therefore they can have their own > attributes. Let's say you made a car object, and it had a > manufacturer > attribute, someone elses cataloging package wouldn't be able to allow > you to search for a certain care made by Ford before a certain year, > becaause all of thesse attributes are specific to your application. > These are the kinds of problems our Catalog is designed to solve (in > addition to good old fasioned free-text searching). > > -Michel > > > > -----Original Message----- > > From: Jay, Dylan [mailto:djay@lucent.com] > > Sent: Friday, June 11, 1999 11:41 PM > > To: 'zope(a)zope.org' > > Subject: [Zope] Is there any plans to combine harvest with catalog? > > > > > > Seems catalog in solving the same problem. > > > > _______________________________________________ > > Zope maillist - Zope(a)zope.org > > http://www.zope.org/mailman/listinfo/zope > > > > (For developer-specific issues, use the companion list, > > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) > > >

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RE: [Zope] Web Reports
by Michel Pelletier 14 Jun '99

14 Jun '99

> -----Original Message----- > From: Bob Floyd [mailto:floyd@caesun.msd.ray.com] > Sent: Monday, June 14, 1999 10:44 AM > To: zope(a)zope.org > Subject: [Zope] Web Reports > > > Hello, > > > > I am wondering if Zope can/does generate web reports > > in the form of charts and graphs? > > Anthony Baxter has written an SQL query builder and report generator: http://www.interlink.com.au/anthony/dmc-0.1.tgz This is an excellent uncharted (pun intended) land for Zope, I forsee lots of charting and plotting programs coming to light, for example, taking stock quotes from a feed and generating charts with a chart object... etc. Python makes things like this so easy. -Michel > > Thanks, > > Bob > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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release schedule?
by Alex Rice 14 Jun '99

14 Jun '99

When is Zope 2 going to be released approximately? I've got a project that needs to be finished in 30 days and am trying to figure out whether to use Zope 1 or 2. I wouldn't think about running the alpha version, but OTO it seems very stable to me, for an alpha. Alex Rice | alrice(a)swcp.com | http://www.swcp.com/~alrice Current Location: N. Rio Grande Bioregion, Southwestern USA

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ISP and Zope
by Catalin Braescu 14 Jun '99

14 Jun '99

Dear Aaron, I recomend you my brand new web hoster: Cubesoft (www.csoft.net) They are very-very permisive and you can check my words yourself. If what you see is what you need, contact julien(a)csoft.net . I moved thre weeks ago from Intercomm (www.icom.com) to Cubesoft because I need Zope... Best regards, Catalin Braescu Coltronix www.coltronix.com P.S. Tell Julien you know Cubesoft from me. I won't earn money but he will see I try to help too (he was incredibly responsive to our requests).

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