RFR: 8264200: java/nio/channels/DatagramChannel/SRTest.java fails intermittently [v4]

[Daniel Fuchs]

On Wed, 7 Apr 2021 11:50:45 GMT, Mark Sheppard <msheppar at openjdk.org> wrote:

>> LGTM!
>
> another observation on the test structure is that each sender is bound to wildcard address, ClassicWriter explicitly through constructor and the NioWriter implicitly when it invokes send - the DatagramChannel is unbound initially, no explicit bind is invoked, and when send is invoked then the underlying socket is bound to wildcard during that call flow.
> There are some subtleties when sending from a socket bound to a wildcard address bound - in this case this is minimal as the recipient address is the loopback address. 
> One possible consideration is to explicitly bind the sender to the loopback address also?
> 
> Both ClassicWriter and NioWriter constructors take a port, which is the destination port of the recipient rather than a port to which they'll bind -- maybe a rename of the parameter to dstPort  ?

@msheppar I would rather not change the way that the senders are bound, unless it is verified that this is causing problems and we are able to figure out why.

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PR: https://git.openjdk.java.net/jdk/pull/3354