Nginx/Unit sendfile failed for upstream

[Sergey A. Osokin]

Hi Bartek,

hope you're doing well.

Next command creates max_body_size setting on http level:

% sudo curl -X PUT -d '{"http": { "max_body_size": 8388608} }' --unix-socket \
 /path/to/control.unit.sock http://localhost/config/settings

Also, it's possible to reconfigure that setting by sending next request:

% sudo curl -X PUT -d '8388609' --unix-socket \
 /path/to/control.unit.sock http://localhost/config/settings/http/max_body_size

-- 
Sergey Osokin

On Sun, Jun 23, 2019 at 03:09:21AM -0400, Bartek wrote:
> Hello
> 
> I have nginx (1.15.9) + unit(1.9) + php(7.2.15).
> 
> When uploading files larger then 8Mb Nginx was failing with 413 Payload too
> large, so in nginx.conf, http {} section I added "client_max_body_size=0" -
> it worked for nginx, but now Unit is rejecting uploads.
> 
> Everything works fine for uploads smaller then ~8MB. When I go above that
> value, browser will fail with 502 Bad Gateway,  Unit will log nothing and
> nginx/error.log will have a following line:
> 
> 2019/06/23 08:38:14 [error] 20682#20682: *3 sendfile() failed (32: Broken
> pipe) while sending request to upstream, client: 127.0.0.1, server: wp1.wrf,
> request: "POST /uploader.php HTTP/1.1", upstream:
> "http://127.0.0.1:8301/uploader.php", host: "wp1.wrf", referrer:
> "http://wp1.wrf/zamowienie,dodaj-zdjecia.html"
> 
> PHP limits: post_max_size=40M, upload_max_filesize=20M verified with phpinfo
> - but uploader.php is never executed in that case (it logs every request in
> separate file, no log files are created (not even empty)).
> 
> In Unit docs (http://unit.nginx.org/configuration/#settings) there is
> something called "max_body_size", however it is impossilbe to adjust that
> value. I've made PUT / POST requests to /config/max_body_size,
> /config/settings/http/max_body_size and many other variations, all without
> success, e.g.:
> 
> curl -X PUT -d '"30M"' --unix-socket /var/run/control.unit.sock
> http://localhost/config/max_body_size
> {
>         "error": "Invalid configuration.",
>         "detail": "Unknown parameter \"max_body_size\"."
> }
> 
> Any help would be appreciated.
> Cheers,
> Bartek
> 
> Posted at Nginx Forum: https://forum.nginx.org/read.php?2,284631,284631#msg-284631
> 
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