<div dir="ltr">Hi,<div><br></div><div>We've many zero size buff alerts related to file_uploader.php file in nginx logs :</div><div><br><div><br></div><div>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: <a href="http://domain.com">domain.com</a> request: "OPTIONS /actions/file_uploader.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/www.socket:", host: "<a href="http://domain.com">domain.com</a>"<br></div></div><div><br></div><div>---------------------------------------------</div><div><br>Here is our Nginx Version :<br><br><div>[root@cw001 /usr/local/etc]# nginx -V</div><div>nginx version: nginx/1.8.0</div><div>built with OpenSSL 1.0.1j-freebsd 15 Oct 2014 (running with OpenSSL 1.0.1l-freebsd 15 Jan 2015)</div><div>TLS SNI support enabled</div><div>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</div></div><div><br></div><div>---------------------------------------------------</div><div><br></div><div>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 ?<br><br>Thanks in advance !!<br><br>Regards.</div><div>Shahzaib</div></div>