GoogleCodeExporter
commented
8 years ago Upgrade your version of mod_wsgi. That is an old version.
Error messages are logged. Where the errors are logged depends on how you have
configured Apache. You
have not supplied any information about your configuration, whether you are
using embedded mode or
daemon mode, whether WSGIScriptAlias is inside of a VirtualHost, whether
ErrorLog directive is used inside of
VirtualHost, whether LogLevel has been overridden from Apache default. Try and
at least describe it if not
provide cut down configuration. Ensue you show how ErrorLog directive is set.
Normally the errors messages related to a specific request will go to the error
log associated with the
VirtualHost, or that for main Apache server if none defined. There are some
circumstances where errors can
end up in main Apache server error log if still have ErrorLog in VirtualHost,
so check both.
All the same, there aren't known to be any issues with logging, even with that
old version. One mistake have
seen people make and which is propagated by some blogs and recipes available
and believed even to be done
internal to some packages, is to reassign sys.stdout/sys.stderr to be something
else such as file opened on
/dev/null. If you have fiddled with sys.stderr in this way, logged error
messages can go missing.
Suggest you create a hello world program which does the following and post
response in browser and what
you get in the log file so can confirm what has been done in the interpreter
environment. If you claim still
nothing in error logs, with that test, then in Apache configuration set
LogLevel to 'info' so can get additional
information out of mod_wsgi about what it is doing and after fresh Apache
restart and making request, post
from error logs what is shown from before request to after.
import sys
print >> sys.stderr, "importing script"
def application(environ, start_response):
status = '200 OK'
print >> sys.stderr, "running application"
print >> environ['wsgi.errors'], "running application"
output = ''
output += 'mod_wsgi.process_group="%s"\n' % environ['mod_wsgi.process_group']
output += 'mod_wsgi.application_group="%s"\n' % environ['mod_wsgi.application_group']
output += 'type(sys.stdout)="%s"\n' % str(type(sys.stdout))
output += 'id(sys.stdout)="%s"\n' % str(id(sys.stdout))
output += 'type(sys.stderr)="%s"\n' % str(type(sys.stderr))
output += 'id(sys.stderr)="%s"\n' % str(id(sys.stderr))
print >> environ['wsgi.errors'], output
response_headers = [('Content-type', 'text/plain'),
('Content-Length', str(len(output)))]
start_response(status, response_headers)
return [output]
Original comment by Graham.Dumpleton@gmail.com on 8 Oct 2009 at 2:36
Original issue reported on code.google.com by
sli...@gmail.comon 8 Oct 2009 at 1:12