Re: Python Multiprocessing With Django

My program trigger some regression file in a remote host for that I used paramiko module.

 But I want to trigger same kinda file to different machines parallel-ly.

I am using django so that people can use this as web app.

I am using url-view-template model. How can use I multi threading in the views function? If you come up with a solution please let me know.

It requires the( if "__name__"="main": ).How can I do that?

On Friday, 6 March 2009 20:37:33 UTC+5:30, Vitaly Babiy wrote:

I have a management command that that starts up a few process to process a request: http://dpaste.com/7925/.

But every so offen I get a exception say mysql went a way, but it didn't.
Process PoolWorker-3:
Traceback (most recent call last):
 File "/usr/lib/python2.5/site-

packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/process.py", line 236, in _bootstrap
   self.run()
 File "/usr/lib/python2.5/site-packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/process.py", line 93, in run
   self._target(*self._args, **self._kwargs)
 File "/usr/lib/python2.5/site-packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/pool.py", line 71, in worker
   put((job, i, result))
 File "/usr/lib/python2.5/site-packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/queues.py", line 353, in put
   return send(obj)
PicklingError: Can't pickle <class 'http_tracker.models.DoesNotExist'>: attribute lookup http_tracker.models.DoesNotExist failed
Traceback (most recent call last):
 File "/home/vbabiy/projects/git-projects/howsthedotcom/manage.py", line 11, in <module>
   execute_manager(settings)
 File "/usr/lib/python2.5/site-packages/django/core/management/__init__.py", line 350, in execute_manager
   utility.execute()
 File "/usr/lib/python2.5/site-packages/django/core/management/__init__.py", line 295, in execute
   self.fetch_command(subcommand).run_from_argv(self.argv)
 File "/usr/lib/python2.5/site-packages/django/core/management/base.py", line 195, in run_from_argv
   self.execute(*args, **options.__dict__)
 File "/usr/lib/python2.5/site-packages/django/core/management/base.py", line 222, in execute
   output = self.handle(*args, **options)
 File "/home/vbabiy/projects/git-projects/howsthedotcom/tracker/management/commands/tracker.py", line 37, in handle
   res = p.map(check_site, sites)
 File "/usr/lib/python2.5/site-packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/pool.py", line 148, in map
   return self.map_async(func, iterable, chunksize).get()
 File "/usr/lib/python2.5/site-packages/multiprocessing-2.6.1.1-py2.5-linux-i686.egg/multiprocessing/pool.py", line 422, in get
   raise self._value
_mysql_exceptions.OperationalError: (2013, 'Lost connection to MySQL server during query')

Any one got any idea why this is happening?

Vitaly Babiy

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