JEP 132: More-prompt finalization

Srinivas Ramakrishna ysr1729 at
Fri Dec 23 08:27:43 PST 2011

i.e. unless I minsunderstood "more aggressive management of the
finalization queue"
as something the JVM does based on its understanding of the dynamic
of FinalRefs or something like that.

-- ramki

On Fri, Dec 23, 2011 at 8:24 AM, Srinivas Ramakrishna <ysr1729 at>wrote:

> Hi Jon,
> That is true. However, those modifications are in the core libraries. The
> VM<->JDK library interaction ceases,
> in some sense, at the GC<->RefHandler boundary. So I tend to agree with
> David that
> the immediately-affected APIs and their implementation (also mentioned by
> you above)
> are in the core libraries. It makes sense to include the core-libs alias
> into the discussion.
> The JEP also mentions modifications to he RefHandler thread (and, between
> the lines, perhaps
> has the GC<->RefHandler interaction in mind?). One question: are the
> changes envisaged for
> the RefHandler thread going to affect the promptness of handling other
> Reference subtypes
> than just FinalReferences?
> PS: I am glad this JEP is being executed; Finalizers are not going to go
> away anytime soon,
> even though many applications have been rewritten to reduce their reliance
> on promptness
> o Finalization. Thus, this will help many many Java users out there. +1!
> thanks.
> -- ramki
> On Fri, Dec 23, 2011 at 8:13 AM, Jon Masamitsu <jon.masamitsu at>wrote:
>> David,
>> From the VM side there are two issues that I think we should understand
>> better before we work on an API.  Those are described in the JEP as
>> 1) more aggressive management of the of finalization queue and 2) multiple
>> finalizer threads.  We should see how much of the problem can be
>> alleviated by either or both or by other VM side changes that occur to us
>> during the work and then think about what is left and what information
>> we want from the user to address what's left.   As Mark has said, I
>> think there will be a library side JEP at some point for those
>> discussions.
>> Jon
>> On 12/22/2011 6:15 PM, David Holmes wrote:
>>> On 23/12/2011 9:05 AM, mark.reinhold at wrote:
>>>> Posted:**132<>
>>> hotspot-dev seems the wrong mailing list to discuss this. It is
>>> primarily a Java level API. I would suggest using core-libs-dev.
>>> David
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