April 2000 - Zope-Dev

cvs prob
by Robin Becker 21 Apr '00

21 Apr '00

I keep getting this cvs error cannot open directory /cvs-repository/Zope2/lib/python/Products/PythonMe thod: No such file or directory -- Robin Becker

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RE: [Zope-dev] Zope instability problem
by TFE WSD JARVIS JOHN 21 Apr '00

21 Apr '00

Thank you! Thank you! I've looked over some of the other things there, too. I'll try some of the debugging suggestions posted around. One thing to add: Zope crashing under stress doesn't seem to be related to the Oracle connections. 'list_mon_detail' is an SQL Method but today I found that I get the same results with a regular DTML Document in a folder with no SQL objects at all. It just takes longer and I have to hit it harder. John Jarvis > -----Original Message----- > From: Tres Seaver [SMTP:tseaver@palladion.com] > Sent: Friday, April 21, 2000 12:41 PM > To: TFE WSD JARVIS JOHN > Cc: zope-dev(a)zope.org; Chris Petrilli > Subject: Re: [Zope-dev] Zope instability problem > > Tres Seaver wrote: > > > > TFE WSD JARVIS JOHN <jarvis.sd082(a)ex.tel.co.jp> > > > > Thank you for such a detailed description of the problem, and ways to > > reproduce it. Can you let us know the details of your Oracle setup > > (oracle version, which OCI libraries you pick up, etc.) > > > > Unless you object, I will clone your description over to the > High-Availability > > Zope wiki: > > > > http://www.zope.org/Members/tseaver/Projects/HighlyAvailableZope > > > > BTW, I am assuming that the 'list_mon_detail' method sits on top of a > ZSQL > > Method -- is this correct? > > *Groveling* Please forgive my haste in posting a request for more data > without > reading all the way to the end of your marvelously detailed description. > Mea > culpa, mea maxima culpa. > > I have added said wonder to the wiki at: > > <URL: > http://www.zope.org/Members/tseaver/Projects/HighlyAvailableZope/CrashingZ > opeWithOracle> > > Tres. > -- > ========================================================= > Tres Seaver tseaver(a)digicool.com tseaver(a)palladion.com > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope )

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Re: [Zope-dev] Zope instability problem
by Tres Seaver 21 Apr '00

21 Apr '00

TFE WSD JARVIS JOHN <jarvis.sd082(a)ex.tel.co.jp> Thank you for such a detailed description of the problem, and ways to reproduce it. Can you let us know the details of your Oracle setup (oracle version, which OCI libraries you pick up, etc.) Unless you object, I will clone your description over to the High-Availability Zope wiki: http://www.zope.org/Members/tseaver/Projects/HighlyAvailableZope BTW, I am assuming that the 'list_mon_detail' method sits on top of a ZSQL Method -- is this correct? Tres. > > 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: <traceback snipped> -- ========================================================= Tres Seaver tseaver(a)digicool.com tseaver(a)palladion.com

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ZClass nesting/adding desperation
by Rik Hoekstra 20 Apr '00

20 Apr '00

This subject has come up in some form or another several times on the mailing list and I have studied every piece of information I could lay my hands upon, but I can't seem to grasp this. I have a product with a number of nested ZClasses. This is a bit unfortunate, but I want the Classes to only be addable from a specific environment and not have them cluttering the addable objects tab in all folders. As several people have remarked before, the contained classes do not show up in the Subobjects tab (from a certain point onwards Object Manager subclasses do not even show the tab anymore), but this can be overcome by calling their factory methods directly. Now if a ZCLass is contained in another ZClass this works well. But when the ZCLasses are defined on the same level, or if an instance of the same ZClass is to be added to an existing instance, this _will_not_work_. All juggling with dtml-with and calling instances directly can't help this, they are invariably added to the nearest parent folder object. Now this forces me to revise the design of the product, and probably that will solve the question and result in a better product. All the same. Is there any guru out there who can explain what is happening and _why_. Or is this a bug? Rik

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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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