SIGSEGV crash in ObjectMonitor::enter with latest Shenandoah JDK8

[Roman Kennke]

Hi Alexander,

Can you upload the hs_err somewhere? I believe the mailing list strips
the large attachment.

Thanks,
Roman

> Hello again! After some time, I finally managed to reproduce the crash in a
> non-production environment with +ShenandoahVerify. I attach the hs_err file.
> 
> This was reproduced with a regular shenandoah-jdk8 build. Meanwhile, I've
> built the application with fastdebug build and will try with that too if
> necessary.
> 
> On Mon, 4 Nov 2019 at 13:09, Aleksey Shipilev <shade at redhat.com> wrote:
> 
>> On 11/1/19 10:50 PM, Aleksey Shipilev wrote:
>>> On 11/1/19 9:21 PM, Alexander Yakushev wrote:
>>>> This happened two times today as I increased the load on the process.
>>>> Here's a piece of the error file:
>>>>
>> https://gist.github.com/alexander-yakushev/828617521ab0368d7bff854745f1fec8
>> .
>>>> I can't share all of it, unfortunately, but I will try to make a
>>>> lightweight reproducible case
>>>
>>> Yes, MCVE would be very handy.
>>>
>>>> Hope this helps, I will try to provide more context if necessary.
>>>
>>> Full hs_err; fastdebug build; +ShenandoahVerify -- or any combination of
>> the above would help.
>>
>> I tried a few combinations of Netty, jcstress and adhoc tests with
>> advanced verification, and still
>> cannot reproduce it. Can you send me the full hs_err somehow?
>>
>> --
>> Thanks,
>> -Aleksey
>>
>>