ngx_tcp_push_n   3007 src/http/ngx_http_request.c             ngx_connection_error(c, ngx_socket_errno, ngx_tcp_push_n " failed");
ngx_tcp_push_n    716 src/http/ngx_http_spdy.c             ngx_connection_error(c, ngx_socket_errno, ngx_tcp_push_n " failed");
ngx_tcp_push_n   1817 src/http/ngx_http_upstream.c                           ngx_tcp_push_n " failed");