Strange behaviour of G1 GC

[Alexander Bulaev]

Hi Thomas, looks like this is the issue.
Is the fix incuded in 8u20 early access builds?
Thanks.

On 28.07.2014, at 12:36, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:

> hi,
> 
> On Mon, 2014-07-28 at 11:48 +0400, Alexander Bulaev wrote:
>> Hi Charlie,
>> thanks for your reply.
>> 
>> Yes, the application is doing humongous allocations also causing Full GCs, but at least this is understanadble. I’ll try the options you mentioned. Also, AFAIK there are some improvements on humongous allocations coming in 8u20.
>> But the really mysterious thing is that never ending concurrent mark. Do you know something about it?
> 
> Looks like https://bugs.openjdk.java.net/browse/JDK-8040803 . The fix is
> in 8u20.
> 
> Not sure if it is a problem (actually I do not think so), but the mark
> stack seems to overflow frequently. Maybe increasing the "MarkStackSize"
> helps.
> 
> Thanks,
>  Thomas
> 
>