8203765: java/nio/channels/Selector/SelectAndClose: add some prints and @intermittent tag

[Alan Bateman]

On 24/05/2018 15:27, Brian Burkhalter wrote:
>
> On May 24, 2018, at 12:34 AM, Alan Bateman <Alan.Bateman at oracle.com 
> <mailto:Alan.Bateman at oracle.com>> wrote:
>
>> I assume the issue with the test is that closeThread closes the 
>> Selector before selectThread calls select and this leads to the 
>> ClosedSelectorException. The test gives selectThread two seconds to 
>> block in select and it seems this is not enough on some (overloaded?) 
>> test systems.
>
> I did not see that there was a ClosedSelectorException thrown.
>
>> One suggestion is […] Another suggestion is to get rid of closeThread.
>
> I was wondering whether it would be sufficient to put in the call 
> selectThread.join() at the appropriate place.
>
Waiting for the selectThread to terminate would at least allow you to 
capture the CloseSelectorException (assuming that is being thrown).

-Alan.
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