http listen method is possible to be called twice with no error

[ifraixedes]

I've realised that if I create an http server and I call listen on the same port and hostname, several times, no error is reported on error event and the listen callback is called each time.

I've been surprised in finding this behaviour and I'm not sure if this is the expected one after I've tried to found this case in the docs; so I've opened this issue.

[sam-github]

Its not well doced, but you can reopen a server. Try with a different port, it should work, too.

[ifraixedes]

No problem, as I said, it's something that I wasn't expected and it looked weird.
Should I send a PR adding the behavior in docs?

[jasnell]

Adding documentation that explains that calling listen multiple times will reopen the server would be a good thing in my opinion. +1 :-) Thank you @ifraixedes for spotting that.

[jasnell]

@nodejs/http

[jasnell]

@nodejs/documentation