How to find classes FinalReference references to?

[Vitaly Davidovich]

Hi Tao,

Have you tried taking a heap dump (jmap) and then using a heap
viewer/analyzer, such as MAT <http://eclipse.org/mat/>? You should be able
to find instances of FinalReference, and what they point at.

HTH

On Fri, May 8, 2015 at 6:33 PM, Tao Mao <yiyeguhu at gmail.com> wrote:

> Hi,
>
> I find one of our applications using G1GC takes a comparably long time to
> do [Ref Proc]. Tried ParallelRefProcEnabled, with no noticeable
> improvement. Turning on PrintReferenceGC further finds all of processed
> references are FinalReference. We want to know which code is using a
> finalizer at this point. Our own code base does not use finalize() at all.
> So, I suspect finalize() is being used by some external Java libraries but
> they are not easy to find.
>
> Is there any way to find and profile classes/objects FinalReference
> references to?
>
> (I guess I'm still able to hack into OpenJDK code but I'd rather not do
> that :)
>
> Thanks.
> Tao
>
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