Can not ping

[lichunqiang]

Env:

[vagrant@centstead-box demo-chat]$ php -v
PHP 7.0.13 (cli) (built: Nov  8 2016 20:16:29) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Xdebug v2.4.1, Copyright (c) 2002-2016, by Derick Rethans

Start:

[vagrant@centstead-box demo-chat]$ sudo php kraken.server
Server is booting...
Server is up!

Ping:

[vagrant@centstead-box demo-chat]$ php kraken server:ping
Kraken 0.3.2 by Kamil Jamroz and contributors.

Executing : server:ping ... failure!
Response  : No response was received during specified timeout.
Reason    : Kraken\Throwable\Exception\Runtime\TimeoutException

Is there a way to find out why ping timeout.

Thanks.