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November 2011

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Subject:
Problem Invalid memory access of location
From:
Rodrigo Barros <[log in to unmask]>
Reply To:
ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Date:
Thu, 10 Nov 2011 16:03:16 -0200
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Dear all,

I'm running ECJ on a macbook with OSX Lion (10.7.2), 8GB ram and Java
1.6.0_29.
I have noticed that my app (a GA for evolving decision-tree
parameters/components) crashes when running in large datasets (I get a
"I*nvalid
memory access of location*" error). This is a bit strange because when I
set the JVM to run in 32-bit mode (-d32) or in interpretable mode (-Xint)
the GA works fine (though MUCH slower than 64bits normal mode).

Do you have any idea of what seems to be the problem? I don't think it's a
hardware problem since I tested it on other computer and got the same error
message (though it was also a computer running OSX). Perhaps there's a bug
in memory management of OSX and 64bits JVM in applications running several
threads??

Thank you in advance!

-- 
Rodrigo Coelho Barros, MSc.
PhD Student
Bioinspired Computation Laboratory (BioCom)
Department of Computer Science
University of São Paulo at São Carlos (ICMC-USP)

www.icmc.usp.br/~rcbarros <http://www.icmc.usp.br/%7Ercbarros>
e-mail (1): [log in to unmask]
e-mail (2): [log in to unmask]

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