I think this has been fixed, so close it.
At revision: 997868
o Cache the factory instance so that a single instance is used per module
At revision: 997732
o DefaultValidator should use configured ValidatorFactory if any
rev 950395 includes the bval support in jetty servers. Needs adding to tomcat servers.
Very basic support for Validator and ValidatorFactory in rev 945801. This makes no attempt to locate the xml configuration files for these components.
This support is described section EE.5.16 of the Java EE 6 specification. This requires jndi lookup entries for java:comp/Validator and java:comp/ValidatorFactory.