From: <glassfish_at_javadesktop.org>
Date: Thu, 01 Jul 2010 14:16:16 PDT

http://www.sun.com/software/appserver/dtds/sun-ejb-jar_3_1-0.dtd

You can set it for individual mdb in sun-ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 9.0 EJB 3.0//EN" "http://www.sun.com/software/appserver/dtds/sun-ejb-jar_3_0-0.dtd">
<sun-ejb-jar>
    <enterprise-beans>
    <ejb>
      <ejb-name>x</ejb-name>
      <bean-pool>.....</...>
    </ejb>
    </enterprise-beans>
</sun-ejb-jar>
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