Re: [Ikvm-developers] Endless loop in ResourceBundle (LocalObjectCache) due to SoftReference ?

[Jeroen F. <je...@su...>]

Hi Christian,

This should now be fixed in cvs.

Regards,
Jeroen

> -----Original Message-----
> From: Jeroen Frijters
> Sent: Monday, February 20, 2012 12:44
> To: Christian Prochnow; ikv...@li...
> Subject: RE: [Ikvm-developers] Endless loop in ResourceBundle
> (LocalObjectCache) due to SoftReference ?
> 
> Hi Christian,
> 
> Sorry for the late reply, I was on vacation. I think your analysis is
> correct. The LocaleObjectCache code assumes that the SoftReference will
> get enqueued "immediately" when the SoftReference is cleared (by my
> reading of the spec this is not a valid assumption), but IKVM's
> implementation only "eventually" enqueues the SoftReference (it can take
> severals GCs for this to happen).
> 
> I will look into how to best fix this. Thanks for reporting it.
> 
> Regards,
> Jeroen
> 
> > -----Original Message-----
> > From: Christian Prochnow [mailto:pro...@op...]
> > Sent: Thursday, February 16, 2012 16:50
> > To: ikv...@li...
> > Subject: [Ikvm-developers] Endless loop in ResourceBundle
> > (LocalObjectCache) due to SoftReference ?
> >
> > Hi,
> >
> >
> >
> > we encounter an endless loop with IKVM when using
> > ResourceBundle.getBundle(string).
> >
> >
> >
> > Reading the OpenJDK sources for LocalObjectCache shows that there is a
> > "while(value != null)" that seems to loop forever.
> >
> > The value retrieved from the CacheEntry is stored using a
> SoftReference.
> >
> >
> >
> > Can the IKVM SoftReference implementation cause this to happen?
> >
> > Sadly, as of now, we could not write a testcase that reproduces the
> bug.
> > But it happens from time to time in our project.
> >
> >
> >
> > Here is the StackTrace where the application gets stuck:
> >
> >
> >
> > IKVM.OpenJDK.Core.dll!sun.util.locale.LocaleObjectCache.get(object key
> > =
> > {sun.util.locale.BaseLocale}) + 0xb3 Bytes
> >
> > IKVM.OpenJDK.Core.dll!java.util.ResourceBundle.Control.getCandidateLoc
> > al es(string baseName, java.util.Locale locale) + 0x2b Bytes
> >
> > IKVM.OpenJDK.Core.dll!java.util.ResourceBundle.getBundleImpl() + 0x137
> > Bytes
> >
> > IKVM.OpenJDK.Core.dll!java.util.ResourceBundle.getBundle(string
> > baseName) + 0x31 Bytes
> >
> >
> >
> >
> >
> >
> > Any ideas?
> >
> >
> >
> >
> >
> > Best regards,
> >
> >
> >
> > Christian
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > i.A. Christian Prochnow
> >
> > Software Developer
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