As it turns out, the only message that is suppressed in mod_wsgi 3.X is 'client closed connection' and not 'failed to write data'.
Especially since you are using embedded mode, the reason you are perhaps getting an aborted request as 'failed to write data' is that the request is using SSL. In that circumstance rather than 'client closed connection' could get the failed to write data instead. Does your application receive HTTPS requests? Graham On 6 July 2011 07:25, kamal sharma <[email protected]> wrote: > Yes i am using mod_wsgi/3.3. And I am not sure > about WSGIDaemonProcess/WSGIProcessGroup directives, but yes there is > nothing defined in apache as such. > in Apache it defines only: > WSGIScriptAlias /web /op/ww/web/apps.wsgi > After you said then i tried to refresh the page frequently but i am not > getting this error. But when i check the log, it is coming every now and > then. As this application is using by big audiance, so not sure what is the > root cause. Its basically a bug tracking system. I am not able to reproduce > it in my development environment. So not sure what is the root cause of this > issue. > Thanks, > > On Wed, Jul 6, 2011 at 2:02 AM, Graham Dumpleton > <[email protected]> wrote: >> >> On 6 July 2011 05:09, kamal sharma <[email protected]> wrote: >> > Thanks for the quick response. >> > Here are the version details: >> > Apache/2.2.16 >> > mod_wsgi/3.3 >> > Python/2.6.6 >> > So do we need to change anywhere or only upgrade mod_wsgi/3.3 will >> > solve >> > this problem. BTW what version i have to install? >> >> But you say you have mod_wsgi 3.3 already. Am confused. >> >> BTW, what mod_wsgi mode are you using? Embedded or Daemon? >> >> If you don't know what I am talking about, are you using >> WSGIDaemonProcess/WSGIProcessGroup directives? >> >> Also indicate whether the behaviour I described seems to match what >> you are doing, or whether you are saying that you get this message on >> every single page refresh and not if/just when interrupting rendering >> of the current page. >> >> Graham >> >> > Thanks, >> > >> > On Tue, Jul 5, 2011 at 11:03 PM, Graham Dumpleton >> > <[email protected]> wrote: >> >> >> >> You would only be seeing this if you refresh a page before the >> >> response from a prior request had been completely written back by the >> >> web application. >> >> >> >> What the error is saying is that while writing back a response, the >> >> socket connection from the client browser was severed prematurely >> >> before the client had read all the response. This would occur where >> >> you pressed refresh in a browser before waiting for original page to >> >> be completely returned and drawn in the browser. >> >> >> >> So, it should be an isolated action due to conscious action on the >> >> part of the user. You should not be seeing this on ever request. >> >> >> >> That you are even seeing this suggests you are perhaps using an older >> >> version of mod_wsgi as the message is suppressed in most cases with >> >> mod_wsgi 3.X. >> >> >> >> The original issue about the messages that can be generated when >> >> browser closes connection early can be seen at: >> >> >> >> http://code.google.com/p/modwsgi/issues/detail?id=29&can=1 >> >> >> >> What version of mod_wsgi are you using? >> >> >> >> Graham >> >> >> >> On 6 July 2011 03:15, pankaj <[email protected]> wrote: >> >> > Hi, >> >> > >> >> > Whenever i refresh the web page then i got below error in Apache >> >> > error >> >> > log file. I have googled about this issue, but did not find the >> >> > proper >> >> > solution for this issue. >> >> > >> >> > mod_wsgi (pid=9655): Exception occurred processing WSGI script >> >> > '/x/y/z/ >> >> > web/apps.wsgi'. >> >> > IOError: failed to write data >> >> > >> >> > my apps.wsgi script looks like this: >> >> > >> >> > import os, sys >> >> > # figure out where on disk this gnatatui install is hiding >> >> > base_path = __file__.split('/web/apps.wsgi')[0] >> >> > >> >> > # and add it to sys.path >> >> > for path in ('/op/ww/dj/django-trunk', base_path): >> >> > if path not in sys.path: >> >> > sys.path.append(path) >> >> > >> >> > os.environ['DJANGO_SETTINGS_MODULE'] = 'web.settings' >> >> > >> >> > import django.core.handlers.wsgi >> >> > >> >> > _application = django.core.handlers.wsgi.WSGIHandler() >> >> > >> >> > def application(environ, start_response): >> >> > >> >> > base_url = environ['SCRIPT_NAME'][1:] # drop leading slash >> >> > if base_url != 'web': >> >> > from django.conf import settings >> >> > settings.BASE_URL = base_url >> >> > >> >> > # Adjust PATH_INFO to get around a Djago bug. See: >> >> > # http://code.google.com/p/modwsgi/wiki/IntegrationWithDjango >> >> > environ['PATH_INFO'] = environ['SCRIPT_NAME'] + >> >> > environ['PATH_INFO'] >> >> > return _application(environ, start_response) >> >> > >> >> > >> >> > Please let me know if you need any more info. >> >> > >> >> > Any help will be highly appreciate. >> >> > >> >> > Thanks. >> >> > >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups "modwsgi" group. >> >> > To post to this group, send email to [email protected]. >> >> > To unsubscribe from this group, send email to >> >> > [email protected]. >> >> > For more options, visit this group at >> >> > http://groups.google.com/group/modwsgi?hl=en. >> >> > >> >> > >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> >> Groups >> >> "modwsgi" group. >> >> To post to this group, send email to [email protected]. >> >> To unsubscribe from this group, send email to >> >> [email protected]. >> >> For more options, visit this group at >> >> http://groups.google.com/group/modwsgi?hl=en. >> >> >> > >> > >> >> -- >> You received this message because you are subscribed to the Google Groups >> "modwsgi" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/modwsgi?hl=en. >> > > -- You received this message because you are subscribed to the Google Groups "modwsgi" group. 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