Nginx zero size buf in output in error_log

[PedroV.]

Hello,

I have Parallels Plesk 11.5 installed of my server with nginx activated and in error_log of nginx I have lots of this type of error:

2014/04/17 03:58:11 [alert] 17069#0: *40767618 zero size buf in output t:1 r:0 f:0 00000000006D4632 -00000000006D4632 0000000000000000 0-0 while sending request to upstream, client: ipofclient, server: domain.com, request: "HEAD /wp-content/uploads/2014/04/a-mosca-85x54@2x.jpeg HTTP/1.1", upstream: "fastcgi://unix:/var/www/vhosts/system/domain.com/php-fpm.sock:", host: "www.domain.com $referrer: "http://www.domain.com/"

Anyone can help me to resolve this problem?

Thank you

 

[InderS]

Hello,

I can see it's just a alert for you. There is no issues with your site OR server setting, If you want to change your nginx error log setting in /etc/nginx/nginx.conf file.

 

[PedroV.]

Hi,

But I have some problems with Wordpress... Since I change to nginx, sometimes when we publish a post or browse on website, stops responding and I think that is the same time this alert appears on error log of nginx.

Which could be the fastcgi needs more buffer?

Thank you