RFR 8184445: JShell tests: fail intermittently if tests are run in high concurrent mode.

[Robert Field]

On 02/26/18 10:23, joe darcy wrote:
> Hi Robert,
>
> The fix looks acceptable in terms of addressing the problem, but is 
> there a sense of how this might impact running time of the test suite?
>
> Phrased differently, are there plans to make the tests more robust to 
> concurrent runs in the future?

Hi Joe,

There is a lot of network connection happening in these tests, most of 
which is in layers we don't control (JDI).  We have been trying to lower 
the risk and we don't see failures running the tests ourselves, but 
intermittent failures scattered through the suite during testing (e.g. 
mach5) have been a constant problem.

We will see the impact on test duration.  Default connection has 
three-level fail-over, the tests of other connection modes see failure 
far more frequently, so, if necessary, we can look at tuning this.

-Robert

>
> Thanks,
>
> -Joe
>
>
> On 2/26/2018 8:40 AM, Robert Field wrote:
>> Please review.
>>
>> Bug:
>>     https://bugs.openjdk.java.net/browse/JDK-8184445
>>
>> Webrev:
>>     http://cr.openjdk.java.net/~rfield/8184445v0.webrev/
>>
>> Thanks,
>> Robert
>>
>