Hi,

I have a nginx server doing ffmpeg video conversions, we've noticed if we upload a file around 100Mb in size it won't upload and throws a "zero buf" error in nginx log; other logs not capture anything.

2014/01/31 22:18:49 [alert] 27455#0: *90757882 zero size buf in output t:0 r:0 f:1 0000000000000000 0000000000000000-0000000000000000 00000000023B4E68 0-0 while sending request to upstream, client: 120.xxx.x.51, server: www.video.domain.com, request: "POST /ajax/language HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "video.domain.com", referrer: "http://video.domain.com/upload/video"

This is also from wordpress install on the same server

2014/01/31 22:23:26 [alert] 27448#0: *90768658 zero size buf in output t:0 r:0 f:1 0000000000000000 0000000000000000-0000000000000000 00000000024DB4D8 0-0 while sending request to upstream, client: xxx.61.14.155, server: domain.com.au, request: "POST /wp-cron.php?doing_wp_cron=1391225006.5313498973846435546875 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "domain.com.au"

build:

nginx version: nginx/1.4.4
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC)
TLS SNI support enabled
configure arguments: --sbin-path=/usr/local/sbin --with-http_mp4_module --with-http_flv_module --with-http_gzip_static_module --with-http_gzip_stati c_module --with-http_ssl_module --with-http_spdy_module --with-http_secure_link_module --with-http_ssl_module


My worry is it's a configuration error, we've had site admin edit our config as shown below, I see no changes though we still have large file problem and zero buffer error.



client_body_buffer_size 200m;
client_max_body_size 300m;

connection_pool_size 256;
client_header_timeout 10m;
client_body_timeout 10m;
send_timeout 10m;
keepalive_timeout 10;

#FastCGI

fastcgi_buffer_size 256k;
fastcgi_buffers 256 16k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_max_temp_file_size 0;
fastcgi_send_timeout 600;
fastcgi_read_timeout 600;
fastcgi_connect_timeout 120;
fastcgi_index index.php;

Anyone had this error? I don't find much here about it.