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Liferay 6.0 SP1 Spring Portlet FilterClassLoader unable to find a resource available on classpath  RSS feed

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I have com.springsource.javax.validation-1.0.0.GA.jar (JSR 303 framework) and hibernate-validator-4.2.0.Final.jar (Reference Implementation for JSR 303 framework)
available at <LIFERAY_PORTAL_ROOT>/tomcat-6.0.29/webapps/ROOT/WEB-INF/lib.

All the portlet plugins are able to find the implementation class org.hibernate.validator.HibernateValidator
[META-INF/services/javax.validation.spi.ValidationProvider implementation in hibernate-validator-4.2.0.Final.jar]
and the classloader in context is found to be following by JSR 303 validation framework:

delegate: false
----------> Parent Classloader:

But when kaleo-web plugin deployment is started the classloader changes to com.liferay.portal.spring.util.FilterClassLoader due to
a org.springframework.beans.factory.config.BeanFactoryPostProcessor registered in the spring's application context for kaleo

The Liferay's implementation of org.springframework.beans.factory.config.BeanFactoryPostProcessor is as below:

And the com.liferay.portal.spring.util.FilterClassLoader is unable to find the implementation for resource META-INF/services/javax.validation.spi.ValidationProvider
which fails the kaleo-web plugin initialization by Spring framework saying "Unable to find a default provider".

Can anybody provide some guidance on how to resolve this or rather how to make the custom classloader com.liferay.portal.spring.util.FilterClassLoader find the required resource
in the server?
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