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Zope instability problem
by TFE WSD JARVIS JOHN 20 Apr '00

20 Apr '00

Hi all, I've been having severe problems with Zope stability lately. I wanted to provide a more detailed report, but I can't seem to find out what Zope is doing when it crashes--it seems completely random. I'd file a bug report, but I'm not sure exactly what to call a bug here or if there really is a bug and not just a bad setup on my part. Well, here goes: -- Zope drops connections to Oracle DB Based on what I saw with Zope 1, I thought that DB connections were persistent. Since moving to Zope 2, I've noticed that quite often the DB connections are lost. After watching the v$session table for a while, I noticed that when running a number of queries, Zope opens a number of connections equal to the number of Zope threads. When the traffic stops for a time (not long), these connections all disappear. Is this normal? Often it seems that Zope can't reopen the connection and crashes or gives an error: "xxxx not connected to a database." I thought maybe it was a setting on the DB side, but idle time, etc. is set for infinity for the Zope users. Also, this happens quite frequently under heavy use. -- Zope crashes when using the [Open/Close Database Connection] button. Related to the above? Or is the above related to this? Most often crashes after editing the connection properties or getting the "xxxx not connected to a database." error, noticing that the connection is marked as "Not Connected", and then clicking "Open Database Connection". -- Zope crashes after heavy continued useage Feeling adventurous, I wrote a script that uses ZClient to request a query report page using random id's as search parameters. The script looks something like this: --------begin script from ZPublisher import Client from time import time, ctime from random import random i = 0 # number or passes while 1: i = i + 1 id = int(random()*1757) + 20000000 print "[" + ctime(time()) + "]", "Pass:", i, "No:", id Client.call('http://appserver:8080/action/list_mon_detail?' 'call_no='+id, 'anonymous', '') ---------end script With Zope set for four threads and five instances of the script running on a different machine, Zope will silently crash within a half hour. ZDaemon restarts the process if it can, but no errors are reported (even in debug mode). I've also noticed that memory usage increases constantly until the crash. I still have gobs left, though. I've noticed no difference in running through Apache/PCGI or Medusa. A typical traceback looks something like this: ----------begin traceback Traceback (innermost last): File "C:\PROGRA~2\hammers\HAMMER~1.PY", line 21, in ? Client.call('http://myserver:8080/action/list_mon_detail?call_no=%i&lng_id=0 &dsp_menubtn=on'%call_no, 'anonymous','') File "C:\PROGRA~1\GEORGE\lib\python\ZPublisher\Client.py", line 344, in call return apply(Function(url,username=username, password=password), (), kw) File "C:\PROGRA~1\GEORGE\lib\python\ZPublisher\Client.py", line 225, in __call__ self.handleError(query, ec, em, headers, response) File "C:\PROGRA~1\GEORGE\lib\python\ZPublisher\Client.py", line 240, in handleError raise t, RemoteException(t,v,f,l,self.url,query,ec,em,response) bci.ServerError: -1 (File: Unknown Line: Unknown) -1 for http://myserver:8080/action/list_mon_detail?call_no=20000695&lng_id=0&dsp_me nubtn=on ----------end traceback My system: Zope test server: OS: Linux 2.2.14, glibc 2.0 CPU: Celeron 466MHz Memory: 128MB Disk Space: Gobs and Gobs Zope Version: 2.1.6 (built from source dist.) ZOracleDA Version: 2.2 (problem exists w/2.1, too) Connection Method: PCGI, Medusa Oracle Client: Net8 (from 8.0.5 dist.) Lan: 100Mbps Zope client: OS: Windows NT Client: ZPublisher (from binary dist) Browser: Netscape 4.61 (others use IE4.0) Lan: 10Mbps Oracle server: OS: HPUX Hardware: Bigger than my refrigerator * 2 Oracle Version: 7.3.1 Lan: 100Mbps (on same segment as Zope server) I really wish I had more details. I'll send an update if I find anything. Thank You, John Jarvis

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Re: [Zope-dev] Product Development
by Michel Pelletier 20 Apr '00

20 Apr '00

Please continue to cc the list. Andre Schubert wrote: > > whats wrong. And what are document strings? class Foo: def bar(self): """ This is a document string """ pass -Michel

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Re: [Zope-dev] File per ZCLass Instance
by Phillip J. Eby 20 Apr '00

20 Apr '00

At 08:50 PM 4/19/00 -0600, Chimezie Ogbuji wrote: >I've created a new ZClass which inherits from Object manager. I want all >instances of the class to have two File variables (should be unique). Edit your ZClass' constructor so that it creates the File objects when the object is created. Then each instance will have its own, seperate File objects.

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zclass inheritance and default index_html
by Vicki Irwin 20 Apr '00

20 Apr '00

Hi, I am a new user of Zope, and I am having the problem described below and I cannot find the answer in any of the documentation. Can anyone help me? I have a Zclass that uses the File Class as a base class. My Zclass has its own index_html method that provides the default view for the Zclass instances. This is what I want, but I find that I now do not have a way to view the file contained in an instance (evidently the only way to do this is to default to the index_html method of the file base class, which can only be accomplished if I remove the index_html that I created for my Zclass). I'd really like to use my own index_html and do two things: (1) have the contents of the file (in this case its a gif image) displayed inline with the other html my index_html generates (2) provide a hyperlink in my index_html that when clicked displays the contents of the file. (in this case the object contains large html/text files). I greatly appreciate your help! Vicki Irwin virwin(a)psionic.com

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File per ZCLass Instance
by Chimezie Ogbuji 20 Apr '00

20 Apr '00

I've created a new ZClass which inherits from Object manager. I want all instances of the class to have two File variables (should be unique). I wasn't sure how to handle this so I put two empty File instance in the methods folder of the ZClass. The user has to supply the files when he/she instanciates the object. I simply call the manage_upload method on the Files I put in the method folder. However it seems the File instances are acting more like class variables than instance variables, I'm assuming it's because the methods folder is for class-wide objects, methods, etc. However I don't know where else to put these files or how I can have every instance of the ZClass have two file variables ( I can't add a file to a property sheet, and this would seem like the most likely place to put such a variable declaration). Do I have to subclass something else besides Object Manager? If so, is it possible to change the inheritance of a ZClass withought redefining it (the baseclasses field isn't editable)? thx Chime

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local index_html in ZClass instance
by news-list.zope.dev＠innominate.de 19 Apr '00

19 Apr '00

Hi, my folderish ZClass Product already contains an index_html document. I would like to provide users with a possibility to create a local index_html document in their instance of the product. but if I create a local index_html, I get a key error: "already in use". Is this a general ZClass problem? Is there a solution? regards, Heiko -- heiko.stoermer(a)innominate.de innominate AG networkingpeople fon: +49.30.308806-0 fax: -77 web: http://innominate.de

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Running Zope From Idle
by Grakka 19 Apr '00

19 Apr '00

Can someone tell me if it's possible to run zope from idle? and if so, the sybtax used? thanks.

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Product Development
by Andre Schubert 19 Apr '00

19 Apr '00

Hi, I'm from german and i started to program products for my zope. I understand the work between zope and my python-product, but i have a problem. I have a class with methods, one method is called person, to add a person to a list. This method should be called from a from from a dtml doc. But zope says the following.   Who can help me, it is very important. Thanks a lot P.S.: My product files are atteached and sorry for my english

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"Views" in ZClasses
by Jason Spisak 19 Apr '00

19 Apr '00

Is the "Views" tab in Zclasses set to only allow you to see DTMLMethods/DTMLDocuments? I have a class that sub lcasses ObjectManager and, although I can select it as a 'View', it doesn't show up as a tab in the management interface. All my best, -- Jason Spisak 444(a)hiretechs.com

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Re: [Zope] CVS PTK and IOError?
by Michel Pelletier 19 Apr '00

19 Apr '00

Please continue to cc the list. Mario Lang wrote: > > (Object: dtml/toolbox) > IOError: [Errno 2] No such file or directory: '/usr/lib/zope/lib/python/Products/PTKBase/dtml/toolbox.dtml' > > > I'm *guessing* that you installed the PTK files as one user (perhaps > > root) and your Zope is running as another user (perhaps nobody) that > > does not have permission to read the files. > Thats what I guessed too. I set ownership to www-data (the user > Zope runs on), and got the same problem. The file mentioned above > doesnt exist in my CVS checkout. It does in one I just checked out from the Public CVS, did you pass -d to cvs? This is how I update: cvs -z7 -q up -P -d -Michel

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