Thank you for your answer.
I asked Webfaction to change machine and problem disappeared. Possibly was
some issue with server.
But still when I set maximum-requests=300, it gave me timeout.
Can you clarify what mod_wsgi parameters mean and how to tune server, so
that it consumes less memory?
I want to simultaneously serve only 3-5 requests and other requests should
be queued.
What should be a value of KeepAlive, ServerLimit, StartServers,
MaxRequestWorkers, MinSpareThreads, MaxSpareThreads, ThreadsPerChild,
Timeout, MaxKeepAliveRequests, KeepAliveTimeout, StartServers,
MaxRequestsPerChild, maximum-requests, processes, threads?
In addition, I want to know difference between processes and threads.
Thank you very much.
On Tuesday, October 13, 2015 at 1:39:31 PM UTC+3, Graham Dumpleton wrote:
>
> The messages indicate that all the threads in the daemon process group
> were blocked.
>
> Initially new requests will still get added to the socket listener queue
> for the daemon processes, which has a capacity for 100 queued requests by
> default. Because though the daemon process wasn’t actually accepted them
> and removing them from the queue, on the Apache child worker side where
> they were being proxied, they would timeout. That accounts for the message:
>
> Timeout when reading response headers from daemon process
>
> When that 100 queue depth was eventually exceeded, no more requests could
> be queued up. This then resulted in attempts to connect to the daemon
> processes failing outright, which is what the error:
>
> Unable to connect to WSGI daemon process
>
> is all about.
>
> First up I would suggest you also ensure you are setting:
>
> WSGIApplicationGroup %{GLOBAL}
>
> This forces the application to run the in the main interpreter context of
> the daemon process groups.
>
> This avoids problems with third party extension modules for Python that
> haven’t been implemented correctly so as to be able to be used in sub
> interpreter contexts. These can only work in the main interpreter context.
>
> This is often a cause of thread deadlocks.
>
> That said, that you say it lasts 2 hours and then disappears is
> interesting.
>
> This is because 2 hours is the network keep alive timeout value.
>
> So what may be happening is request threads are contacting some backend
> service and due to some network/router issue, the connection is being
> broken. In some circumstances, depending on what software is doing with the
> connection, such a condition may not be detected until the 2 hour network
> timeout occurs.
>
> In light of that, what backend services does your application talk to and
> would that traffic traverse over any switching equipment. Have you been
> having any network issues.
>
> Graham
>
>
> On 12 Oct 2015, at 11:55 pm, Paul Royik <[email protected] <javascript:>>
> wrote:
>
> Hi Graham and everyone.
>
> I have a site that runs heavy math calculations using external math
> library.
>
> I already wrote about it nearly half a year ago. In that case there was
> timeout issue, but now I've fixed it.
>
>
> But there is another issue.
> Nearly the same time I got 503 error: Timeout when reading response
> headers from daemon process.
> This lasts for approximately 2 hours and then 503 error disappears.
>
> I use Django 1.8.4 with mod_wsgi 4.4.13.
>
> What configurations should I use in httpd.conf to avoid this error.
> How to queue requests?
> What is the number of sumultaneous requests?
> ....
>
>
> What I want to do is avoid 503 error, limit number of simultaneous
> requests and queue other requests.
>
>
> My log file:
> [Mon Oct 12 11:47:09.445618 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45625] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:47:14.432179 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45632] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/trapezoidal-rule-calculator/?f=tan%28x%2F2%29+%2B+%281%2F%28x%5E2%2B4%29%29&a=0&b=2&n=8&steps=on
> [Mon Oct 12 11:47:20.201940 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45700] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-2/partial-fraction-decomposition-calculator/?numer=4x%5E&denom=x%5E2%28x%5E2%2B1%29&steps=on
> [Mon Oct 12 11:47:20.608201 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45704] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:48:08.984176 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:45707] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/simpsons-rule-calculator/
> [Mon Oct 12 11:48:09.505969 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45730] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-1/synthetic-division-calculator/?numer=2x%5E3-7x%5E2%2B12x-9&denom=2x-3&steps=on
> [Mon Oct 12 11:48:14.492629 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45731] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:48:20.262302 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45732] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-1/synthetic-division-calculator/?numer=2x%5E3-7x%5E2%2B12x-9&denom=2x-3&steps=on
> [Mon Oct 12 11:48:20.668421 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45737] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:49:09.044532 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:45744] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:49:09.566430 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45789] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=sin%5E5+%28x%29&var=&steps=on
> [Mon Oct 12 11:49:14.552970 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45795] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:49:20.322179 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45799] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/simpsons-rule-calculator/
> [Mon Oct 12 11:49:20.728784 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45803] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-2/partial-fraction-decomposition-calculator/?numer=4x%5E&denom=x%5E2%28x%5E2%2B1%29&steps=on
> [Mon Oct 12 11:50:09.104426 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:45816] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=ln+x+&var=x&steps=on
> [Mon Oct 12 11:50:09.626783 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45819] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/definite-integral-calculator/?f=%28y%5E%281%2F2%29%2F2%29%2B%281%2F%282*y%5E%281%2F2%29%29%29&var=&a=3&b=9
> [Mon Oct 12 11:50:14.613330 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45820] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/trapezoidal-rule-calculator/
> [Mon Oct 12 11:50:20.382640 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45832] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:50:20.789229 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45846] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:51:09.164863 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:45848] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:51:09.634602 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45879] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&ved=0CFAQFjAJahUKEwje1pz16rzIAhXKGI4KHVrPAzA&url=http%3A%2F%2Fwww.emathhelp.net%2Fnotes%2Fcalculus-1%2Fdrawing-graphs-of-functions%2Fsteps-for-sketching-graph-of-function%2F&usg=AFQjCNGAABCyCB7rhd4yAI83Dd0NDLTrPw
> [Mon Oct 12 11:51:14.639873 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45914] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:51:20.443005 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45918] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.com/
> [Mon Oct 12 11:51:20.849576 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45920] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.ge/
> [Mon Oct 12 11:52:09.225178 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:45922] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:52:09.694485 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:45936] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:52:14.671605 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:45945] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=sin%5E5+%28x%29&var=&steps=on
> [Mon Oct 12 11:52:20.503359 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:45950] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-1/synthetic-division-calculator/?numer=2x3-x%2B8x-4&denom=2x-1&steps=on
> [Mon Oct 12 11:52:20.909837 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:45993] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&ved=0CFAQFjAJahUKEwje1pz16rzIAhXKGI4KHVrPAzA&url=http%3A%2F%2Fwww.emathhelp.net%2Fnotes%2Fcalculus-1%2Fdrawing-graphs-of-functions%2Fsteps-for-sketching-graph-of-function%2F&usg=AFQjCNGAABCyCB7rhd4yAI83Dd0NDLTrPw&cad=rja
> [Mon Oct 12 11:53:09.285607 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46014] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:53:09.754914 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46023] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/?var=x&steps=on&calcid=36&f=e%255E%2528-x%2529%252Acos%2528n%252Ax%2529
> [Mon Oct 12 11:53:14.731428 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46025] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:53:20.563428 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46026] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CCYQFjABahUKEwjjltCA7LzIAhVCvxQKHfBSCp8&url=http%3A%2F%2Fwww.emathhelp.net%2Fcalculators%2Fcalculus-2%2Fsimpsons-rule-calculator%2F&usg=AFQjCNHj3Aq2ZX5FyNMjo3ZLfkh_YTjl6Q
> [Mon Oct 12 11:53:20.969433 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46031] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:54:09.345978 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46041] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-1/
> [Mon Oct 12 11:54:09.815250 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46044] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:54:14.791866 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46049] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:54:20.623426 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46050] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:54:21.029911 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46113] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:55:09.406413 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46119] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:55:09.863209 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46133] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-2/partial-fraction-decomposition-calculator/?numer=4x%5E&denom=x%5E2%28x%5E2%2B1%29&steps=on
> [Mon Oct 12 11:55:14.852263 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46138] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:55:20.683175 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46159] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:55:21.090180 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46163] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=sin%5E5+%28x%29&var=&steps=on
> [Mon Oct 12 11:56:09.466178 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46166] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/algebra-1/
> [Mon Oct 12 11:56:09.923661 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46168] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:56:14.912643 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46199] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:56:20.743628 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46214] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py
> [Mon Oct 12 11:56:21.150586 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46215] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/simpsons-rule-calculator/
> [Mon Oct 12 11:57:09.526178 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46227] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5E%28x%5E%281%2F2%29%29%2Fx%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:57:09.983178 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46228] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:57:14.973070 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46232] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5E%28x%5E%281%2F2%29%29%2Fx%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:57:20.782657 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46245] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5E%28x%5E%281%2F2%29%29%2Fx%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:57:21.210175 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46250] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.nz/
> [Mon Oct 12 11:58:09.586684 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46282] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:58:10.043640 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46296] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.co.uk/
> [Mon Oct 12 11:58:15.033461 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46303] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> https://www.google.nl
> [Mon Oct 12 11:58:20.843056 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46347] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5E%28x%5E%281%2F2%29%29%2Fx%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:58:21.270190 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46357] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:09.647160 2015] [wsgi:error] [pid 10210:tid
> 139829304096512] [client 127.0.0.1:46358] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:10.104071 2015] [wsgi:error] [pid 10210:tid
> 139829293606656] [client 127.0.0.1:46360] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:15.093941 2015] [wsgi:error] [pid 10210:tid
> 139829390120704] [client 127.0.0.1:46362] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:20.903456 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] [client 127.0.0.1:46366] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:21.330199 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] [client 127.0.0.1:46367] Timeout when reading response
> headers from daemon process 'django_math':
> /home/simamura/webapps/django_math/mathsite/mathsite/wsgi.py, referer:
> http://www.emathhelp.net/calculators/calculus-2/integral-calculator/?f=%28e%5Ex%5E%281%2F2%29%29%2F%5E%281%2F2%29&var=&steps=on
> [Mon Oct 12 11:59:35.919450 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] (11)Resource temporarily unavailable: [client
> 127.0.0.1:46419] mod_wsgi (pid=10210): Unable to connect to WSGI daemon
> process 'django_math' on
> '/home/simamura/webapps/django_math/apache2/logs/wsgi.10205.0.1.sock' after
> multiple attempts as listener backlog limit was exceeded.
> [Mon Oct 12 11:59:36.345433 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] (11)Resource temporarily unavailable: [client
> 127.0.0.1:46444] mod_wsgi (pid=10210): Unable to connect to WSGI daemon
> process 'django_math' on
> '/home/simamura/webapps/django_math/apache2/logs/wsgi.10205.0.1.sock' after
> multiple attempts as listener backlog limit was exceeded., referer:
> http://www.emathhelp.net/calculators/calculus-2/definite-integral-calculator/?f=%28y%5E%281%2F2%29%29%5E3%2F3-y%5E%281%2F2%29&var=&a=3&b=11
> [Mon Oct 12 11:59:50.935597 2015] [wsgi:error] [pid 10210:tid
> 139829400610560] (11)Resource temporarily unavailable: [client
> 127.0.0.1:46489] mod_wsgi (pid=10210): Unable to connect to WSGI daemon
> process 'django_math' on
> '/home/simamura/webapps/django_math/apache2/logs/wsgi.10205.0.1.sock' after
> multiple attempts as listener backlog limit was exceeded.
> [Mon Oct 12 11:59:51.361244 2015] [wsgi:error] [pid 10210:tid
> 139829283116800] (11)Resource temporarily unavailable: [client
> 127.0.0.1:46532] mod_wsgi (pid=10210): Unable to connect to WSGI daemon
> process 'django_math' on
> '/home/simamura/webapps/django_math/apache2/logs/wsgi.10205.0.1.sock' after
> multiple attempts as listener backlog limit was exceeded.
> [Mon Oct 12 12:00:01.987886 2015] [core:warn] [pid 21414:tid
> 140401755707200] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:00:01.990053 2015] [mpm_worker:notice] [pid 21414:tid
> 140401755707200] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:00:01.990090 2015] [core:notice] [pid 21414:tid
> 140401755707200] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:01:01.141488 2015] [core:warn] [pid 22714:tid
> 139862846170944] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:01:01.148104 2015] [mpm_worker:notice] [pid 22714:tid
> 139862846170944] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:01:01.148136 2015] [core:notice] [pid 22714:tid
> 139862846170944] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:02:01.287286 2015] [core:warn] [pid 23392:tid
> 140227605587776] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:02:01.288063 2015] [mpm_worker:notice] [pid 23392:tid
> 140227605587776] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:02:01.288087 2015] [core:notice] [pid 23392:tid
> 140227605587776] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:03:01.464154 2015] [core:warn] [pid 24460:tid
> 139893862491968] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:03:01.464941 2015] [mpm_worker:notice] [pid 24460:tid
> 139893862491968] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:03:01.464973 2015] [core:notice] [pid 24460:tid
> 139893862491968] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:04:01.604819 2015] [core:warn] [pid 25540:tid
> 140530401601344] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:04:01.605673 2015] [mpm_worker:notice] [pid 25540:tid
> 140530401601344] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:04:01.605700 2015] [core:notice] [pid 25540:tid
> 140530401601344] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:04:13.617169 2015] [mpm_worker:error] [pid 25540:tid
> 140530401601344] AH00286: server reached MaxRequestWorkers setting,
> consider raising the MaxRequestWorkers setting
> [Mon Oct 12 12:05:01.702670 2015] [core:warn] [pid 26818:tid
> 140673843578688] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:05:01.703557 2015] [mpm_worker:notice] [pid 26818:tid
> 140673843578688] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:05:01.703589 2015] [core:notice] [pid 26818:tid
> 140673843578688] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:06:01.168476 2015] [core:warn] [pid 27705:tid
> 140135096485696] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:06:01.169291 2015] [mpm_worker:notice] [pid 27705:tid
> 140135096485696] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:06:01.169321 2015] [core:notice] [pid 27705:tid
> 140135096485696] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_math/apache2/conf/httpd.conf'
> [Mon Oct 12 12:06:04.172416 2015] [mpm_worker:error] [pid 27705:tid
> 140135096485696] AH00286: server reached MaxRequestWorkers setting,
> consider raising the MaxRequestWorkers setting
> [Mon Oct 12 12:07:01.315453 2015] [core:warn] [pid 28977:tid
> 139863950853952] AH00098: pid file
> /home/simamura/webapps/django_math/apache2/logs/httpd.pid overwritten --
> Unclean shutdown of previous Apache run?
> [Mon Oct 12 12:07:01.316160 2015] [mpm_worker:notice] [pid 28977:tid
> 139863950853952] AH00292: Apache/2.4.16 (Unix) mod_wsgi/4.4.13 Python/2.7.9
> configured -- resuming normal operations
> [Mon Oct 12 12:07:01.316183 2015] [core:notice] [pid 28977:tid
> 139863950853952] AH00094: Command line:
> '/home/simamura/webapps/django_math/apache2/bin/httpd.worker -f
> /home/simamura/webapps/django_mat
>
> ...
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