RFR: 8231260: (dc) DatagramChannel::disconnect changes the port of the local address to 0 (lnx)

[Daniel Fuchs]

On 08/10/2019 15:29, Alan Bateman wrote:
> On 08/10/2019 15:20, mark sheppard wrote:
>> :
>>
>> Q: is  localAddress.getPort() == 0   indicative that the 
>> DatagramChannel is unbound ?
>>
> getLocalAddress() returns a SocketAddress when bound, it returns null 
> when not bound. I don't think we should get too hung up on corner case 
> that arises when the local port cannot be restored (by re-binding). The 
> javadoc sets the expectations that the channel's socket is in an 
> undefined state when disconnect fails.

+1 : you would be in uncharted territory and that's exactly why
we want to throw an exception when rebind fails and why we recommend
closing the channel when that happens.

-- daniel

> 
> -Alan.