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From Gregory Shimansky <gshiman...@gmail.com>
Subject Re: [drlvm] getting activeMQ to run
Date Fri, 22 Sep 2006 23:32:11 GMT
On Friday 22 September 2006 22:39 Geir Magnusson Jr. wrote:
> First, thanks so much for the fast response and good solution.
>
> I don't see any problem with this patch, but you're right - I don't
> understand why we have it, since Logger should set it's "global"
> field to getLogger("global") in the static initialization.

Static initialization doesn't guarantee that the field is initialized when you 
need it. I've seen it several times in classlib initialization. It happens 
because <clinit> method is called only once in the stack of the calling 
methods (or there could be infinite recursion). If <clinit> is somewhere up 
the stack it won't be called again. But if some field of the class which is 
executing <clinit> up the stack already is needed down the stack by some 
other called classes' methods (called from the up the stack <clinit>), it may 
be still uninitialized.

I could write a real java test to show that this is possible but this is too 
late at night and I can't think straight. Just trust my word :)

I think such conditions can happen not only on classlib initialization.

-- 
Gregory Shimansky, Intel Middleware Products Division

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