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

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

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.getCandidateLocal
> 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
> 
> Software Development
> 
> 
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