On Thu, 13 Apr 2000, Marcus Collins wrote:

1. Does Zope hang when you access the management interface using http://path/to/zope/manage_main or ftp?

non, ftp is deactivated. only http

2. Does Zope hang if you run in single threaded mode (z2.py -t 1)?

untested, difficult to test (production)

3. Are you using the default NUMBER_OF_THREADS (4)?

yes, I've not modified that. however it seems more threads (6) are running (addresses are hidden), each is reported by top as using 10 MB (shared of course) (my Data.fs is 2.5 MB) ----------- $ ps eax | grep python 15234 ? S 0:37 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy 15258 ? S 0:00 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy 15259 ? S 0:05 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy 15260 ? S 0:49 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy 15261 ? S 0:52 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy 15262 ? S 0:02 /usr/local/bin/python /home/zope/z2.py -a xx.xx.xx.xx -d yy.yy.yy.yy ------------ I run Zope on an aliased Ethernet adapter and we really don't use products we haven't written for now: a bunch is installed, but none is used AFAIK. we don't use Zope's Catalog in our products for now.

4. Are you using any database adaptors and, if so, which versions?

ZPygreSQLDA-0.3.rjr2 is installed but not used.

5. Is the hanging more or less frequent in Zope 2.1.6 than in 2.1.4?

no. in fact we have noticed this problem three or four days ago, just after having upgraded to MSIE5.01 on a workstation. In doubt I have installed 2.1.6 (I was running 2.1.4 since it was out without any problem so far) but the problem seem to persist.

6. What method of access (HTTP/PCGI/FCGI) do you use for the management interface? Is this the same protocol you use for the rest of the site?

only http zope is launched as standalone, ftp and monitor are disabled. apache is also running on the same machine, but there's no link from one to another.

7. Are you using a binary distribution of Zope, or have you compiled from source? Ditto for python.

both were compiled from source.

8. Can you cause Zope to hang by refreshing the page a number of times in quick succession, or by stopping the request and then reloading?

not tested. however I've just seen Zope hang just when I've launched IE5 and tried to access /manage : IE5 wasn't launched, we launched it then we entered the superuser name and password, then IE5 began to display the management interface then Zope was hung. Unfortunately I don't know if IE5 displayed parts of the management interface from its cache (from last session) or really from Zope. we are concurrently accessing Zope from 2 or 3 workstations as superuser (logged in 3 times from 3 different machines) and the problem really seem to occur from the workstation with IE5. either Lynx or Netscape under Linux produce no problem.

You mentioned that the hanging occurs when an error occurs. Are you referring to a Zope error, or an error which is logged or displayed on the console? A traceback or listing of the error might prove useful.

Zope errors: as beginners with Zope we often make mistakes e.g. we put spaces in ids so this caused errors (but I don't know if this were related to the zope hang). There's no error in Z2.log, but I've not launched Zope in debug mode.

Some of these might just be shots in the dark, but the more information we can gather, the better! Some also might not be practical for you to try out (like running Zope single-threaded, if this is a production server).

I'll try to test some more things, probably tomorrow evening. bye, Jerome