RFR 8249773: Upgrade ReceiveISA.java test to be resilient to failure due to stray packets and interference.

[Alan Bateman]

On 12/08/2020 17:00, Rahul Yadav wrote:
> Hello,
>
> Request to have my fix reviewed for issue:
>
> JDK-8249773:  Upgrade ReceiveISA.java test to be resilient to failure 
> due to stray packets and interference.
>
> This fix upgrades java/nio/channels/DatagramChannel/ReceiveISA.java so 
> it can handle interference from stray packets,
> the test now can handle random order of packets as well.
>
> Issue:  https://bugs.openjdk.java.net/browse/JDK-8249773
> webrev: http://cr.openjdk.java.net/~ryadav/webrev_8249773/index.html
Looks good, there are probably other tests that are subject to 
interference like this too.

Would it be possible to rename "tmp" to "receiver" at L81 to make it 
easier for future maintainers. Also "interfering" in the trace messages 
might be bettered as "Interfered". Minor formatting nits: extra 
semi-colon at L45, line break in odd place at L102, extra line at L88.

-Alan