RFR 8249217: Unexpected StackOverflowError in "process reaper" thread still happens

[David Holmes]

Hi Roger,

On 23/07/2020 12:51 am, Roger Riggs wrote:
> Please review a change to the Process reaper thread initialization to 
> preemptively
> make sure classes ThreadLocalRandom and ConcurrentHashMap are initialized.

I don't see ThreadLocalRandom  appearing in any of the stack traces. ??

David
-----

>  From the stack overflow failures, it seems that the classes have not 
> been initialized
> before they are used during processing the termination of a process.
> When the initialization is performed on the smaller reaper stack, it 
> occasionally
> exceeds the available stack.
> 
> As an aid to diagnostics, 
> -XX:AbortVMOnException=java.lang.StackOverflowError
> is added to TestHumongousNonArrayAllocation that has failed intermittently.
> If the problem happens again it will produce an hs_error file with 
> useful details
> and will otherwise not change the test behavior.
> 
> Webrev:
>     http://cr.openjdk.java.net/~rriggs/webrev-stackoverflow-8249217/
> 
> Issue:
>    https://bugs.openjdk.java.net/browse/JDK-8249217
> 
> Thanks, Roger
>