ngx_socket_n      436 src/core/ngx_connection.c                               ngx_socket_n " %V failed", &ls[i].addr_text);
ngx_socket_n     3058 src/core/ngx_resolver.c                       ngx_socket_n " failed");
ngx_socket_n      316 src/core/ngx_syslog.c                       ngx_socket_n " failed");
ngx_socket_n       36 src/event/ngx_event_connect.c                       ngx_socket_n " failed");