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Ghost objects and memory usage
by Etienne Labuschagne 24 Feb '05

24 Feb '05

Hi all, I have a very long running process which causes the Zope process to eventually eat up all the RAM in my PC. I have tried changing the object cache sizes to no avail. Zope sticks to the cache parameters fairly well (it doesn't overshoot the target by much). The number of ghost objects do keep on increasing, however. Does a ghost object use the full amount of RAM (for that typical type of object) or is it only an empty shell? How do I get Zope to delete/unload these objects manually? B.t.w. I have tried numerous ways to do the long running process including: One thread that get_transaction().commit() every now and again Get new thread, do a few transactions, commit, close thread, wash, rinse, repeat (yes, I know the pitfalls with opening new threads into Zope - I end up reusing one connector from the pool over and over again). The above made no difference to the fact that eventually, memory will run out. The process makes changes to many objects and creates many new objects. It takes a long time to complete (typically a day or more). If I know the ghost objects does not use up memory, I can hunt for memory leaks in my own code, but currently the only thing that increases and increases is the number of ghost objects. Thanks Etienne

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Zope service stopped
by Pawel Lewicki 24 Feb '05

24 Feb '05

Hi, I have a problem. I'm running Zope on Windows 2K and one day it just didn't want to start. There is no info in zope or system log. It just dosn't start. I tried to install a new fresh Zope-2.7.4 installation, change ports it's running, reinstall a service. No change. Of course runzope.bat starts without a problem :] I found some info about the same problem, but not a clear answer. The only suggested solution was to check entry in registry. I did so. Everything seems to be fine. And I just found that: >PythonService.exe -debug Zope_myzopeservicenumber works fine! Any ideas? Pawel Lewicki

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ZInformixDA problem
by Nico Saiz 24 Feb '05

24 Feb '05

Hi everybody, this is my first email to the list. I'm trying to install ZInformixDA on Zope2.7.3 and python 2.3, and in the README says that I need the informixdb1.3 package. I've download the package but when I do the make and make install this is the error reported: make: *** No rule to make target 'boot'. Stop Has anybody some experience on this case? Thanks, Nico

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Can't access my zope product functions by URL
by Anders Karlsson 23 Feb '05

23 Feb '05

I have made my first attempts on developing my own products in Python and I have a problem I can't find any solution to. My problem is that I can't access functions in my product by the URL. I have tried to find what's wrong for several days now, but I can't really find anything. I have used the boring-product example product as base for my tries and my initialization is pretty much the same. My "__init__.py" file registers a class called RSSFeed and just as the boring-product it currently only contains functions to add the object to the Zope object-DB, view the object and change the title. When the user changes the title it uses a form that calls the function manage_edit(). The problem is that when I do that I get a 404 error telling that the file "http://www.myserver.org/test/myobject/manage_edit" doesn't exist. What makes my hair fading to gray is that my code for this is almost identical to the boring-product example and there it works! One major difference is that I call the "security.declareProtected()" function to register my function and boring-product uses an "__ac_permissions__" list instead. But I declare my function access rights just as all other products I've looked at. Also other functions I make in my product and declares the same way gives the 404 error. One interesting thing is that I can call them from inside my index.dtml file for the product, by doing <dtml-var function>-calls. I guess I have missed something with the security settings, but I can't find what it is. Please help me if you can, I am getting insane trying to find it myself. You can see the code for my RSSFeed class attached to this mail. My Zope version is 2.7.4. -- -------------------------------------------------------------------------- Anders Karlsson Email: anders.karlsson(a)cendio.se Cendio AB WWW: www.cendio.se Teknikringen 3, Voice: +46 - (0)13 - 21 46 00 SE-583 30 LINKÖPING, SWEDEN Fax: +46 - (0)13 - 21 47 00

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kInterbaseDA multiple connection
by Konstantin E. Steuck 23 Feb '05

23 Feb '05

Hello list, this is my first post here. I'm running Zope connected to Firebird with kinterbasDA. DB admin has recently told me that there were two active connections to the base under Zope user while there's only one instance of database adapter. I've checked it by running netstat -a on Zope host, here's the output -- tcp 0 0 zope_host:41838 db_host:gds_db ESTABLISHED tcp 0 0 zope_host:41042 db_host:gds_db ESTABLISHED -- The second connections appears short time after Zope restarts, so either DA or kinterbase itself seems to lose active connection. What's more interesting is that number of connections doesn't grow anymore remaining at point of 2. Has anyone encountered similar problem? I'm using Zope 2.7.2, python 2.3.4 on debian kinterbasdb 3.1pre9 kinterbaseDA 2.0 Firebird 1.5 PS Sorry for my poor english :)

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RE: [Zope] Re: Zope and mod_python
by Pascal Peregrina 23 Feb '05

23 Feb '05

mmmm... I thought that thre was one cache per connection to Zeo ?? A standard Zope instance with Zeo has 4 connections to Zeo, and when you look at the cache status, it is different for each connection (different number of objects). So I am not sure that there is anything shared accross connections. If I am right, then it makes no real difference to have many Zope with one connection to Zeo vs. one Zope with many connections to Zeo. If I am wrong, then I agree, "it's a shame" :) Pascal -----Message d'origine----- De : Chris Withers [mailto:chris@simplistix.co.uk] Envoyé : jeudi 10 février 2005 11:36 À : Pascal Peregrina Cc : Tres Seaver; Zope Mailing List Objet : Re: [Zope] Re: Zope and mod_python Pascal Peregrina wrote: > I am not sure we can share anything between instances. I mean, each instance > runs in a completely separate process. That's a shame, 'cos ZEO client cache's can sometimes need ot be pretty huge, and, IIRC, in normal Zope, you only need one for all your threads.... Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com **********************************************************************

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DeadlockDebugger 1.0
by Florent Guillaume 23 Feb '05

23 Feb '05

Debugging a running or deadlocked Zope http://www.zope.org/Members/nuxeo/Products/DeadlockDebugger This product adds a hook so that a deadlocked Zope process can be debugged, by dumping a traceback of all running python processes. The dump is sent to the event log (at the DEBUG level) and returned to the browser (even though the Zope is deadlocked and doesn't answer any other requests!). DeadlockDebugger can of course also be used to debug Zope in non-deadlock situations, when a Zope process is taking a long time and you wish to know what code is being executed. DeadlockDebugger requires the third party 'threadframe' python module, http://www.majid.info/mylos/stories/2004/06/10/threadframe.html 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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RE: [Zope] Zope and threads.
by Pascal Peregrina 23 Feb '05

23 Feb '05

I knew this was a basic python question :)) Thanks again. Pascal -----Message d'origine----- De : Chris McDonough [mailto:chrism@plope.com] Envoyé : mardi 22 février 2005 21:45 À : Pascal Peregrina Cc : ''zope(a)zope.org' ' Objet : RE: [Zope] Zope and threads. On Tue, 2005-02-22 at 15:22, Pascal Peregrina wrote: > Ok, so, this almost completely answers my question. > > Let me tell you more about what I am doing, because I agree that my initial > mail was not that clear. :) > > I am trying to implement a ZeroConf browser (http://www.zeroconf.org/) in > Zope to automatically get the network location of XML RPC services that my > Zope objects talk to. > > The ZMI part is easy. In my new product, I've got my object in the Control > Panel, and it is ready to display whatever data I want (for example the list > of discovered services). > > The ZeroConf implementation itself has already been made by someone else > (http://sourceforge.net/projects/pyzeroconf) > > So I am just trying to plug pieces together now :) > > >From my product, I need to start a thread that will run the ZeroConf code, > and ZeroConf data will then be accessible through a particular object of > this code (the "listener" to be exact, as they call it in pyzeronf). > > This thread should be started when Zope starts, so I guess I can put it in > the __init__.py of my product. > > I only got one issue : my product can be refreshed. > So how can I ensure that the ZeroConf stuff won't be re-initialized if I > refresh my product ? (ending with 2 threads, with one of the threads not > being used). I know this is more a python related question, but I haven't > found a precise answer on the net. I'm not sure of how the internals of refresh work (I dont use it) but I suspect that if you do something like: import sys if not getattr(sys, 'ZEROCONF_STARTED'): .. start the thread .. sys.ZEROCONF_STARTED = 1 It will not spawn another thread. "sys" is just an example here, any module namespace should work (even __builtins__ probably). ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com **********************************************************************

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Re: [Zope] Case Insensitive Zope Authentication
by Chris Withers 23 Feb '05

23 Feb '05

Remy Pinsonnault wrote: > I installed successfully SimpleUserFolder and created the apropriate > methods (getusers, etc.) and the authentication is ok (i can enter in > my plone site as a manager). > > But it does not solve the uppercase problem... you know how? at the start of the add/edit user scripts, and at the start of the getUserDetails script, do the following: name = name.lower() if pasword is not None: password = password.lower() cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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RE: [Zope] Zope and threads.
by Pascal Peregrina 23 Feb '05

23 Feb '05

Ok, so, this almost completely answers my question. Let me tell you more about what I am doing, because I agree that my initial mail was not that clear. :) I am trying to implement a ZeroConf browser (http://www.zeroconf.org/) in Zope to automatically get the network location of XML RPC services that my Zope objects talk to. The ZMI part is easy. In my new product, I've got my object in the Control Panel, and it is ready to display whatever data I want (for example the list of discovered services). The ZeroConf implementation itself has already been made by someone else (http://sourceforge.net/projects/pyzeroconf) So I am just trying to plug pieces together now :) >From my product, I need to start a thread that will run the ZeroConf code, and ZeroConf data will then be accessible through a particular object of this code (the "listener" to be exact, as they call it in pyzeronf). This thread should be started when Zope starts, so I guess I can put it in the __init__.py of my product. I only got one issue : my product can be refreshed. So how can I ensure that the ZeroConf stuff won't be re-initialized if I refresh my product ? (ending with 2 threads, with one of the threads not being used). I know this is more a python related question, but I haven't found a precise answer on the net. Thanks for your answers, and sorry that my first mail was unclear. Pascal -----Original Message----- From: Chris McDonough To: Pascal Peregrina Cc: 'zope(a)zope.org' Sent: 22/02/2005 19:51 Subject: Re: [Zope] Zope and threads. Hi Pascal, It seems like the only thing you need to do is to launch a thread using either the thread or threading module to do what you want if you're not going to access any persistent objects from the newly created thread. Accessing nonpersistent objects created by another thread from within Zope app code is not a problem. - C On Mon, 2005-02-21 at 11:25, Pascal Peregrina wrote: > Hi, > > I need to have some processing done in one thread, that will set some > attributes of a (non persistent) object. > This processing is completely independant from Zope objects. > > Zope objects (persistent or non-persistent) will only need to "read" > data from this object. > > What would be the best way to do this (specially how to initialize my > thread ?) > > Thanks > > Pascal > > ********************************************************************** > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are addressed. If you have received this email in error please notify > the system manager. > > This footnote also confirms that this email message has been swept by > MIMEsweeper for the presence of computer viruses. > > www.mimesweeper.com > ********************************************************************** > > > ______________________________________________________________________ > _______________________________________________ > 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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