Re: Advice: django deploy vps error 502

Your logs contain this:

    IOError: write error

However, more information is needed in order to understand what is going on. A simple "write error" on its own is insufficient—is it a hardware error? Too many open files? Out of disk space? Something else? If your system writes nothing else in /var/log/syslog at the time the error occurs, it may be the fault of uwsgi that it doesn't show more information about the error. Try to increase error message verbosity, if there is an option to do that.

Incidentally, the reason I migrated from uwsgi to gunicorn a few years ago was that every once in a while I was having a different problem with uwsgi, which was taking me hours to solve, largely because of insufficient documentation. After I switched to gunicorn I never looked back.

Regards,

Antonis

Antonis Christofides  http://djangodeployment.com

On 03/01/2017 05:33 PM, carlos wrote:

Hello, Antonis i have debug = false, yes

uwsgi dont write anything in the log :/

When i see the syslog i see error but not understand!

i share this output

http://pastebin.com/69yvC8Tz

thak for you help

On Wed, Mar 1, 2017 at 12:58 AM, Antonis Christofides <antonis@djangodeployment.com> wrote:

Hello,

502 usually means the backend isn't running. After you finish the test, has the backend stopped running? Does it continue to throw 502s? If that is the case, I'm wildly guessing that processes might be growing and growing in memory and being eventually killed, but I don't really know. Do you have DEBUG = False? Does uwsgi write something in its log? Does the system write something in the syslog?

Regards,

Antonis

Antonis Christofides  http://djangodeployment.com

On 02/28/2017 10:49 PM, carlos wrote:

Hi, all 

i have one vps for one application,

 vps description

16GB RAM

8 core processor

160 GB SSD

6TB Transfer

ok, i am using, uwsgi(2.0.14), nginx(1.10), mysql(5.6 )and ubuntu 16.04 LTS

this site working well when is visited or hits 1k even 6k, but when visited 10k or 12k

raiser error 502,

When I do a test of ab like these command line

ab -k -c 350 -n 20000 mydomain.com/

again raiser the error 502 in almost pages

these are configs all, wsgi, nginx

---- uwsgi script in /etc/uwsgi/app-availabre/website.ini -----

http://pastebin.com/vQW47WGb

---- nginx conf in /etc/nginx/nginx.conf  ------

http://pastebin.com/5BsWWaps

----- nginx vhost for my website mydpmain --------

http://pastebin.com/bMPvmrwR

How can I do so that the site does not throw the error?

Are the settings correct?

How can i know the layer support the vps?

In nginx how to stop the ab test, if many people do the test the web site throws the error 502 ngixn

I would appreciate it if someone gave me an idea or advice to configure better when there is high traffic or are doing ab test or another benchmarking test

cheers

--

att.

Carlos Rocha

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att.

Carlos Rocha

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