# Nginx Zero Size Buffer Alerts!

**URL:** <https://www.ruby-forum.com/t/nginx-zero-size-buffer-alerts/244145>\
**Category:** NGINX\
**Created:** [February 26, 2016, 12:06pm UTC](https://www.ruby-forum.com/t/nginx-zero-size-buffer-alerts/244145 "2016-02-26T12:06:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [February 26, 2016, 12:06pm UTC](https://www.ruby-forum.com/t/nginx-zero-size-buffer-alerts/244145/1 "2016-02-26T12:06:16Z")

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Hi,

We’ve many zero size buff alerts related to file\_uploader.php file in  
nginx  
logs :

2016/02/26 12:56:02 [alert] 71067#0: \*12457068 zero size buf in output  
t:0  
r:0 f:1 0000000000000000 0000000000000000-0000000000000000  
0000000803E29F08  
0-0 while sending request to upstream, client: 182.178.58.123, server:  
[domain.com](http://domain.com) request: “OPTIONS /actions/file\_uploader.php HTTP/1.1”,  
upstream: “fastcgi://unix:/var/run/www.socket:”, host: “[domain.com](http://domain.com)”

* * *

Here is our Nginx Version :

[root@cw001 /usr/local/etc]# nginx -V  
nginx version: nginx/1.8.0  
built with OpenSSL 1.0.1j-freebsd 15 Oct 2014 (running with OpenSSL  
1.0.1l-freebsd 15 Jan 2015)  
TLS SNI support enabled  
configure arguments: --prefix=/usr/local/etc/nginx --with-cc-opt=‘-I  
/usr/local/include’ --with-ld-opt=‘-L /usr/local/lib’  
–conf-path=/usr/local/etc/nginx/nginx.conf  
–sbin-path=/usr/local/sbin/nginx --pid-path=/var/run/nginx.pid  
–error-log-path=/var/log/nginx-error.log --user=www --group=www  
–with-file-aio --with-ipv6  
–http-client-body-temp-path=/var/tmp/nginx/client\_body\_temp  
–http-fastcgi-temp-path=/var/tmp/nginx/fastcgi\_temp  
–http-proxy-temp-path=/var/tmp/nginx/proxy\_temp  
–http-scgi-temp-path=/var/tmp/nginx/scgi\_temp  
–http-uwsgi-temp-path=/var/tmp/nginx/uwsgi\_temp  
–http-log-path=/var/log/nginx-access.log --with-http\_flv\_module  
–with-http\_geoip\_module --with-http\_mp4\_module  
–with-http\_realip\_module  
–with-http\_secure\_link\_module --with-http\_stub\_status\_module  
–with-pcre  
–with-http\_spdy\_module --with-http\_ssl\_module

* * *

We don’t have 3rd party module installed with nginx. Please let me know  
if  
i am missing something important here which could be cause of these  
errors ?

Thanks in advance !!

Regards.  
Shahzaib

---

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**Author:** ![shahzaib12](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/90db22/32.png) [@shahzaib12](https://www.ruby-forum.com/u/shahzaib12)\
**Post date:** [February 26, 2016, 1:13pm UTC](https://www.ruby-forum.com/t/nginx-zero-size-buffer-alerts/244145/2 "2016-02-26T13:13:26Z")

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On Friday 26 February 2016 16:05:28 shahzaib shahzaib wrote:

> upstream: “fastcgi://unix:/var/run/www.socket:”, host: “[domain.com](http://domain.com)”  
> configure arguments: --prefix=/usr/local/etc/nginx --with-cc-opt='-I  
> –http-log-path=/var/log/nginx-access.log --with-http\_flv\_module

[..]

If you’re using spdy, then that is known issue. You can ignore this  
alert.

wbr, Valentin V. Bartenev

---

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**Author:** ![shahzaib12](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/90db22/32.png) [@shahzaib12](https://www.ruby-forum.com/u/shahzaib12)\
**Post date:** [February 26, 2016, 2:19pm UTC](https://www.ruby-forum.com/t/nginx-zero-size-buffer-alerts/244145/3 "2016-02-26T14:19:27Z")

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Hi,

Alright then, thanks for clarification.

Regards.  
Shahzaib

On Fri, Feb 26, 2016 at 5:12 PM, Valentin V. Bartenev [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)