ZGC Crash

[Mike Rettig]

Erik,

Thank you for fixing this so quickly. Does this mean the fix will be in jdk
17?

Thanks!

Mike

On Mon, Jun 7, 2021 at 4:48 AM Erik Osterlund <erik.osterlund at oracle.com>
wrote:

> I found the problem, and the issue has now been resolved in mainline.
>
> Some inline cache cleaning code was not monotonic, allowing a race where
> the inline cache cleaning could be reverted, which would very much explain
> your crash log.
>
> Thanks again for reporting the issue!
>
> /Erik
>
> On 2 Jun 2021, at 18:12, Erik Osterlund <erik.osterlund at oracle.com> wrote:
>
> 
> Hi Mike,
>
> Thanks for letting me know. I think I know what might have happened. Will
> get back to you soon after thinking a bit further.
>
> Thanks,
> /Erik
>
> On 1 Jun 2021, at 17:30, Mike Rettig <mike.rettig at gmail.com> wrote:
>
> 
>
> >>A very interesting observation is that the last internal exception
> thrown is the following: /NoSuchMethodError'{0x0000100253de4a20}: static
> Lcom/company/nums/biz/compiler/VMethRequest;.<clinit>()V>
> (0x0000100253de4a20) thrown [open/src/hotspot/share/prims/jni.cpp, line
> 1210]
>
> The NoSuchMethodError exceptions are being reported due to serialization.
> All the 'clinit' internal exceptions are for objects that are being
> serialized. The app isn't attempting to create the objects with JNI.
>
> Any other questions that I can help with?
>
> Mike
>
>
>
> On Mon, May 31, 2021 at 10:13 AM Erik Österlund <erik.osterlund at oracle.com>
> wrote:
>
>> Hi,
>>
>> Mike, in the bug report, we have done some initial analysis now.
>> Could you please have a look at what we have written in the bug report?
>> I think we might rely on some further information from you. In
>> particular regarding the use of JNI to perform method calls. There are a
>> whole bunch of reported internal errors when looking up jmethodIDs in
>> the log, that look rather suspicious, with consequences that are hard to
>> predict without knowing a bit more.
>>
>> Thanks,
>> /Erik
>>
>> On 2021-05-31 10:48, Stefan Karlsson wrote:
>> > The bug is now available at:
>> > https://bugs.openjdk.java.net/browse/JDK-8267972
>> >
>> > StefanK
>> >
>> > On 2021-05-28 18:27, Mike Rettig wrote:
>> >> On Fri, May 28, 2021 at 11:22 AM Erik Osterlund
>> >> <erik.osterlund at oracle.com>
>> >> wrote:
>> >>
>> >>> Hi Mike,
>> >>>
>> >>> Thank you for reporting this issue. Do you have a link to the specific
>> >>> crash report you submitted?
>> >>>
>> >>>
>> >> I only have the review id. Here is response from my bug report:
>> >>
>> >> "We will review your report and have assigned it an internal review ID
>> :
>> >> 9070442. Depending upon the completeness of the report and our ability
>> to
>> >> reproduce the problem, either a new bug will be posted, or we will
>> >> contact
>> >> you for further information."
>> >>
>> >> Thanks,
>> >>
>> >> Mike
>> >
>>
>