Edward Syrett [http://community.jboss.org/people/edward.syrett] created the discussion "Exception in HtmlAdaptor" To view the discussion, visit: http://community.jboss.org/message/620798#620798 -------------------------------------------------------------- Hi All, I am running JBoss 4.2.1.GA and it is sometimes throwing the following exception: Servlet.service() for servlet HtmlAdaptor threw exception javax.management.InstanceNotFoundException: jmx.loading:UCL=16b352c is not registered.         at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java:523)         at org.jboss.mx.server.MBeanServerImpl.getMBeanInfo(MBeanServerImpl.java:666)         at org.jboss.jmx.adaptor.control.Server.getMBeanData(Server.java:98)         at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.inspectMBean(HtmlAdaptorServlet.java:201)         at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:96)         at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doGet(HtmlAdaptorServlet.java:77)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)         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 com.kn.tls.valves.AuthValve.invoke(AuthValve.java:59)         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$Http11ConnectionHandler.process(Http11Protocol.java:580)         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)         at java.lang.Thread.run(Thread.java:619) Has anybody got any information about this exception please?  I'd like to know what causes it and how to stop it. Apologies if this post is in the wrong area or whatever. Thanks, Ed. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/620798#620798] Start a new discussion in JBoss AS7 Development at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]