adding rsockets support into JDK

[Alan Bateman]

On 08/12/2018 09:39, Chris Hegarty wrote:
> :
>
> - It has become apparent that mixing blocking and non-blocking
>   connect/accept operations, in the same thread, may cause issues. For
>   example, attempting to setup a connected-socket on the same host by
>   issuing a non-blocking connect followed by a blocking accept, will
>   just hang and not make progress [3]. Upon further enquiries it appears
>   that the programming model for rsocket is a subtly different than that
>   of the regular Berkeley sockets ( at least for the connection
>   handshake ). It is not immediately clear how to reasonably workaround
>   this issue ( it's not a bug in rdma-core, but more a fundamental part
>   of its thread-less operation ).
>
Would it be possible to expand on this to say whether the same issues 
arises when the non-blocking connect is initiated on a different thread, 
or in a different process, or even a different machine on the fabric. 
That is, if the socket is non-blocking and I do a rconnect and then 
delay before doing anything else on the socket then will the peer doing 
accept be blocked/hung in the mean-time?

-Alan