Construction/initialization of custom filter instance, configured in undertow subsystem uses incorrect/undefined TCCL

unzip IgniteHandler.zip into $WILDFLY_HOME/modules set $IGNITE_HOME and unzip gatekeeper-token-config.xml.zip to that location Add a filter and a filter-red in standalone.xml as follows: <filter-ref name="igniteHandler" priority="100"/> <filter name="igniteHandler" class-name="no.toyota.gatekeeper.handler.IgniteHandler" module="no.toyota.gatekeeper:simplified"/>

A workaround was provided by https://developer.jboss.org/people/jaikiran public IgniteHandler() { final ClassLoader oldCL = Thread.currentThread().getContextClassLoader(); try { Thread.currentThread().setContextClassLoader(TokenBouncerHandler.class.getClassLoader()); // rest of your existing code goes here .... } finally { Thread.currentThread().setContextClassLoader(oldCL); }