When is thrown exception in custom-principal-decoder implementation I cannot see any exception in log. ------------------------------------------------------------------------------------------------------ Key: WFCORE-2501 URL: https://issues.jboss.org/browse/WFCORE-2501 Project: WildFly Core Issue Type: Bug Components: Security Reporter: Hynek Švábek Assignee: Darran Lofthouse Fix For: 3.0.0.Beta29 When is thrown exception in custom-principal-decoder implementation I cannot see any exception in log. Log level is set to TRACE. You can see bellow how to reproduce this problem. I attached jar files with implementation where are located .java files too.