[twill] twill-fork: troubles are deepest than I expected
th at yandex-team.ru
Wed Oct 19 04:09:33 PDT 2005
Titus, first of all, let me give you many thanks for twill: it's
excellent for doing quick-and-dirty web testing work! :)
And now, about twill-fork. I've experienced several strange problems
while trying to use it for heavy stressing. And it seems that most of it
are buried inside twill guts, but not in twill-fork.
First cause: I've just running out of open file descriptors. ulimit -n
16384 helps me a bit, but twill-fork explodes before it, leavig all its
childs in unconscious state. Let me guess: open a temporary file for
each thread and spare precious time for diskio in twill-fork isn't
really good idea when we trying hit the limits in stressing an AUT.
After manually removing (quick and dirty, just by commenting out) all
possible measurement stuff from twill-fork, I've got even worse results:
EXCEPTION raised at line 6 of 'xe1.twill'
'NoneType' object has no attribute 'get_url'
Traceback (most recent call last):
File "./twill-fork", line 91, in ?
File "/opt/home/th/twill/twill/parse.py", line 142, in execute_file
execute_command(cmd, args, globals_dict, locals_dict)
File "/opt/home/th/twill/twill/parse.py", line 80, in execute_command
return eval(eval_str, globals_dict, locals_dict)
File "<string>", line 0, in ?
File "/opt/home/th/twill/twill/commands.py", line 374, in go
File "/opt/home/th/twill/twill/commands.py", line 109, in go
print '==> at', self.get_url()
File "/opt/home/th/twill/twill/commands.py", line 148, in get_url
what I am doing:
$ ./twill-fork -n 5000 -p 500 xe1.twill
setlocal addr http://some.address.here
run "from random import *"
run "cookie='cookies/' + str(randint(1,10000)) + '.cookie'"
#get a random cookie from file
So, I can give a hand with digging out the trouble origins, but I cannot
locate the point where it cracks yet.
Yandex QA Team
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