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Re: [aspectj-users]java.lang.StackOverflowError atorg.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)


Santiago,

>I had some trouble getting to the AspectJ source code (I don't understand why don't we get a source distribution when the >binaries are released...),
See FAQ: http://www.eclipse.org/aspectj/doc/released/faq.php#q:buildingsource

We gave up shipping source with 1.0, probably because of download size. You do get it if you install AJDT instead.

Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM United Kingdom Limited
Hursley Park, Winchester,  SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)



Santiago Aguiar <santi@xxxxxxxxxxxxxx>
Sent by: aspectj-users-bounces@xxxxxxxxxxx

30/03/2007 15:31

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Re: [aspectj-users]java.lang.StackOverflowError        atorg.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)





Hi Kevin!

No, its a completely standard Sun 1.5.0_09 VM ;), and I do agree with you about stack handling.

I had some trouble getting to the AspectJ source code (I don't understand why don't we get a source distribution when the binaries are released...), but I'm betting this problem is related to how AspectJ works with generic types.

And thinking about the memory issue, probably some entry in the weak hash map gets cleared when I have less memory as is garbage collected, but as I increase it, the entry is kept in memory and therefore the map still holds a valid reference.....

thanks!

saludos,

Kevin F wrote:

Unless you’re talking about a really strange VM with which I am unfamiliar, the VM allocates the entire stack allocation size each time a thread is started.  No additional allocations take place for the stack itself; i.e., it will not grow.

I guess I am left wondering why type maps are being stored in a WeakHashMap instead of a strong one.

Just my 2 cents,
Kevin



From: Ron Bodkin <rbodkin@xxxxxxxxxxxxxx>
Organization:
New Aspects of Software
Reply-To:
<aspectj-users@xxxxxxxxxxx>
Date:
Thu, 29 Mar 2007 12:39:26 -0700
To:
<aspectj-users@xxxxxxxxxxx>
Subject:
RE: [aspectj-users]java.lang.StackOverflowError atorg.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)

Interesting. I wouldn’t have expected that, but perhaps the VM ran out of heap memory in allocating a stack frame and because it ran out of memory it reported stack overflow.
 


From: aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Santiago Aguiar
Sent:
Thursday, March 29, 2007 12:33 PM
To:
aspectj-users@xxxxxxxxxxx
Subject:
Re: [aspectj-users]java.lang.StackOverflowError atorg.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)


Hi Ron!

Thanks a lot for the reply!

The strack trace is of 1024 function calls... it seems a bit too deep for me (I didn't paste the full stack trace in the email).

I tried your suggestion and it didn't work. However it made me thing and I added -Xms128m -Xmx256m (since I'm passing those parameters when running in a lab where I don't get the error) and it solved the problem.....

I don't exactly see why having less available memory would result in a StackOverflow instead of an OutOfMemory error.....

Ron Bodkin wrote:

Hi Santiago,
 
You might try running your test with a larger stack size, since this doesn’t look like an infinite loop. Try adding a VM argument –Xss2048k to your junit runner to do this. This value is four times the default, so you probably can run with less, but doing this should test whether this fixes the problem (as I suspect it will). Java programs with deep stacks sometimes need a larger value here. And running from Eclipse has different stack depths, so the discrepancy isn’t too surprising.
 


From: aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Santiago Aguiar
Sent:
Thursday, March 29, 2007 8:39 AM
To:
aspectj-users@xxxxxxxxxxx
Subject:
[aspectj-users] java.lang.StackOverflowError atorg.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)


Hi,

I'm using AspectJ 1.5.3 using LTW and writing *most* of my aspects code style. I get the following stack trace when running a test case from ant:

[junit] java.lang.StackOverflowError
    [junit]     at java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:269)
    [junit]     at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
    [junit]     at java.util.WeakHashMap.get(WeakHashMap.java:341)
    [junit]     at org.aspectj.weaver.World$TypeMap.get(World.java:967)
    [junit]     at org.aspectj.weaver.World.resolve(World.java:250)
    [junit]     at org.aspectj.weaver.World.resolve(World.java:191)
    [junit]     at org.aspectj.weaver.UnresolvedType.resolve(UnresolvedType.java:662)
    [junit]     at org.aspectj.weaver.ReferenceType.getRawType(ReferenceType.java:550)
    [junit]     at org.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)
    [junit]     at org.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:276)
    [junit]     at org.aspectj.weaver.ReferenceType.isAssignableFrom(ReferenceType.java:292)
.....

Strangely, I don't get the error if running my test cases from inside Eclipse. If I'm not wrong, eclipse uses it's own compiler while when running from ant I'm compiling with Sun's compiler (1.5.0_09).

I don't really know what else to do... I suspect the issue is while handling generics, but not much else. I'm willing to provide any additional information to help me diagnose the problem.

I'm attaching the generated ajcore files.

thanks a lot,

saludos


--

santiago aguiar
netlabs

Palmar 2548
Montevideo, Uruguay
Tel. +(598 2) 707 7687
Fax. +(598 2) 709 4866

http://www.netlabs.com.uy






 
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--

santiago aguiar
netlabs

Palmar 2548
Montevideo, Uruguay
Tel. +(598 2) 707 7687
Fax. +(598 2) 709 4866

http://www.netlabs.com.uy


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aspectj-users mailing list

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_______________________________________________
aspectj-users mailing list
aspectj-users@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/aspectj-users
 



--
santiago aguiar
netlabs

Palmar 2548
Montevideo, Uruguay
Tel. +(598 2) 707 7687
Fax. +(598 2) 709 4866

http://www.netlabs.com.uy _______________________________________________
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