Shenandoah crash

[Aleksey Shipilev]

On 02/08/2018 02:43 PM, Lennart Börjeson wrote:
>> 7 feb. 2018 kl. 12:10 skrev Aleksey Shipilev <shade at redhat.com>:
>> On 02/01/2018 02:53 PM, Aleksey Shipilev wrote:
>>> Thanks for the bug report!
>>>
>>> On 02/01/2018 01:05 PM, Lennart Börjeson wrote:
>>>> #
>>>> # A fatal error has been detected by the Java Runtime Environment:
>>>> #
>>>> #  Internal Error (/Users/lennartb/RaT/openJDK/shenandoah-jdk10/src/hotspot/share/gc/shenandoah/shenandoahVerifier.cpp:184), pid=37194, tid=11267
>>>> #  Error: Shenandoah verification failed; After Mark, Roots: Must be marked in complete bitmap
>>>>
>>>> Referenced from:
>>>>  interior location: 0x00007faf6cd0d3c0
>>>>  outside of Java heap
>>>>  0x00007faf6cd0d3c0 is a weak global jni handle
>>>
>>>                            ^^^^^^^^^^^^^^^^^^^^^^
>>>
>>> This one seems enough of the smoking gun to chase the bug for now. It must be the bug in handling
>>> the weak global JNI handles: we apparently miss that root during mark?
>>>
>>> If we cannot find any obvious bugs there and/or fail to write a reproducer, we would need to work to
>>> understanding the failing application better. We are going to FOSDEM for the rest of the week, so --
>>> barring heroics of anyone here -- we would be able to look at it next week.
>>
>> You might want to test this patch:
>>  http://mail.openjdk.java.net/pipermail/shenandoah-dev/2018-February/004924.html
>>
>> -Aleksey
> 
> I've run my application with this patch, without any errors. I've tested both adaptive and traversal.

Excellent. Fix is pushed, you might want to continue testing with latest sh/jdk10.

Thanks,
-Aleksey