we still got this problem.
our application is an ear, with no jaxb* files deployed.
it tried to put the jaxb-api file in java_home\jre\lib\endorsed
but still got without a change.
some tips i found
http://www.2exception.com/question/19877
https://jaxb.java.net/guide/Migrating_JAXB_2_0_applications_to_JavaSE_6.html
http://stillhacking.blogspot.de/2013/05/classcastexception-jaxb.html
can please someone help, i've been struggling with this problem the whole day.