Gen ZGC OOM after 12 hours

[Stefan Karlsson]

Hi Cody,

On 2024-04-24 05:05, Cody Lerum wrote:
> Recently after updating from 21.0.2 to 21.0.3 I decided to switch from
> standard ZGC to generational ZGC for a wildfly application server
> which runs with the following settings normally.
>
> -Xmx8G -XX:SoftMaxHeapSize=6G -XX:+UseZGC -XX:ReservedCodeCacheSize=512m
>
> After about 12 hours, and really about 2 hours after usage for the day
> started to ramp up the instance crashed with an status 137 and based
> on all the info it just exhausted its memory. it seemed a bit similar
> to JDK-8282357.
>
> Unfortunately I didn't get a hs_err file, but I do have the jfr files
> for the 20 minutes or so leading up to it. I've shut off gen zgc and
> I'm just using normal zgc for now for the last week without issues,
> but I wanted to let you know I have those JFR files if you think they
> may be of use.

Thanks for letting us know. Yes, please send the JFR files and we'll 
take a look and see if we can see anything that stands out.

Thanks,
StefanK

>
> Thanks!
>
> Cody Lerum