ngx_http_upstream_rd_check_broken_connection   23 http/ngx_http_upstream.c static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r);
ngx_http_upstream_rd_check_broken_connection  480 http/ngx_http_upstream.c         r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;