RFR: 8205651: TestLargeRootSet fails with exception: Could not find root object

[Mikhailo Seledtsov]

Changes look good to me from SQE/test point of view,

Misha

On 12/14/18, 12:47 PM, Erik Gahlin wrote:
> Hi,
>
> Could I have a review of a test that has failed intermittently. By 
> increasing the size of the StackObject array the likelihood of the 
> object sampler finding it increases.
>
> I also added logging, so it is possible to see if the code path for a 
> very large root set is taken. This is not the case, before or after 
> the proposed change. It's hard to trigger that path. To start with, 
> the heap must be at least 640 MB (32 MB/ 5%). I did however test with 
> a modified JVM where the code path was triggered more easily and the 
> test passed.
>
> For now, I'm only making the test more stable and adding logging, so 
> it easier to write a better test in the future.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8205651
>
> Webrev:
> http://cr.openjdk.java.net/~egahlin/8205651/
>
> Thanks
> Erik