"Excess in non-pipelined read" error with nginx and php-fpm

[eluser]Unknown[/eluser]
To eliminate the issue, I ran apache with php-fpm, to reduce the variables. I am running into the issue again. So, the problem is between php-fpm vs mod_php.
I'll take it up in PHP mailing lists too but if somebody has run into this while using codeigniter-restserver library and found a solution, it'll be helpful.