Requests to JBoss fail due to "java.lang.AbstractMethodError: org.apache.catalina.authenticator.AuthenticatorBase.authenticate"

Issue

• We migrated our application to EAP 6 and now see requests continually fail with an exception like below, although this worked fine in EAP 5 and earlier:

ERROR [org.apache.catalina.connector.CoyoteAdapter] (http-127.0.0.1:8080-1) An exception or error occurred in the container during the request processing: java.lang.AbstractMethodError: org.apache.catalina.authenticator.AuthenticatorBase.authenticate(Lorg/apache/catalina/connector/Request
;Ljavax/servlet/http/HttpServletResponse;Lorg/apache/catalina/deploy/LoginConfig;)Z
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:455) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.1.3.Final-redhat-4.jar:
7.1.3.Final-redhat-4]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:567) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:679) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931) [jbossweb-7.0.17.Final-redhat-1.jar:]
        at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_11]