Open 2 PocketMine servers without cause any error

Sometime you need to open 2 servers: 1 for production and 1 for development, and you need to close and reopen the development server to reload the plugin itself (not to reload the config file).
And it may causes the following error: Error 127; Segment fault; Or show nothing.
The solution is go to /bin/php/php.ini and adjust the value:
opcache.enable_cli=0

This will disable the opcode cache and let your server open without problem.
What this do to your server?

And while your server doesn't need this, just let it go.

Read more: http://stackoverflow.com/questions/25044817/zend-opcache-opcache-enable-cli-1-or-0-what-does-it-do

How does this have anything to do with the production server?

Because within the purposes of the server, i couldn't see anything goes wrong.

But... But... But your thread is mainly about the prevention of development server from crashing!

I don't know. It works :<