Attempting to log into JON UI results in error "The username or password provided does not match our records."

Issue

• Receive error "The username or password provided does not match our records." from JON UI
• rhq-server-log4j.log includes error:

2013-03-20 16:29:15,607 ERROR [org.rhq.enterprise.gui.authentication.AuthenticateUserAction] Could not log into the web application
org.rhq.enterprise.server.exception.LoginException: No LoginModules configured for JON

• I can't login with the default rhqadmin account.
• rhq-server-log4j.log contains error:

2013-03-21 04:59:41,138 ERROR [org.apache.catalina.core.ContainerBase] Servlet.service() for servlet ServerInvokerServlet threw exception
java.lang.reflect.UndeclaredThrowableException
    at $Proxy525.processRequest(Unknown Source)
    at org.jboss.remoting.transport.servlet.web.ServerInvokerServlet.processRequest(ServerInvokerServlet.java:128)
    at org.jboss.remoting.transport.servlet.web.ServerInvokerServlet.doPost(ServerInvokerServlet.java:157)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at sun.reflect.GeneratedMethodAccessor167.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
    at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
    at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:283)
    at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:56)
    at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:185)
    at org.rhq.helpers.rtfilter.filter.RtFilter.doFilter(RtFilter.java:125)
    at sun.reflect.GeneratedMethodAccessor168.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
    at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
    at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:218)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
    at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:56)
    at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:185)
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    at sun.reflect.GeneratedMethodAccessor169.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
    at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
    at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:218)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
    at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:56)
    at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:185)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:662)
Caused by: javax.management.InstanceNotFoundException: jboss.remoting:service=invoker,transport=servlet is not registered.
    at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java:523)
    at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:653)
    at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:288)
    ... 59 more

• Not able to login into JON server Console after Oracle DB connection change from One DB Server to other DB server.