A system dependency path "sun/security/provider/certpath" is missing from wildfly's module.xml ---------------------------------------------------------------------------------------------- Key: WFCORE-1705 URL: https://issues.jboss.org/browse/WFCORE-1705 Project: WildFly Core Issue Type: Bug Components: Modules, Server Affects Versions: 2.2.0.Final Reporter: Peter Nalyvayko Assignee: David Lloyd Labels: jboss There is a system dependency path "sun/security/provider/certpath" missing from modules\system\layers\base\sun\jdk\main\module.xml. This is causing class def not found exception when attempting to create an instance of a class from that namespace. The module contents (abbreviated) are shown below. Notice that the path to "sun/security/provider/certpath" is not listed in there: {{<module xmlns="urn:jboss:module:1.3" name="sun.jdk"> <resources> <!-- currently jboss modules has not way of importing services from classes.jar so we duplicate them here --> <resource-root path="service-loader-resources"/> </resources> <dependencies> <module name="sun.scripting" export="true"/> <system export="true"> <paths> ... <path name="sun/security/action"/> <path name="sun/security/pkcs"/> <path name="sun/security/x509"/> <path name="sun/security"/> <path name="sun/security/util"/> <path name="sun/security/krb5"/> <path name="sun/security/krb5/internal"/> <path name="sun/security/pkcs11"/> <path name="sun/security/provider"/> ... </paths> <exports> <include-set> <path name="META-INF/services"/> </include-set> </exports> </system> </dependencies> </module> }}Manually adding the missing system dependency path fixes the issue.