struts problem report

struts has detected an unhandled exception:

messages:
  • there is no action mapped for namespace /cepai_news and action name productshow.

  • stacktraces

    there is no action mapped for namespace /cepai_news and action name productshow. - [unknown location]
        com.opensymphony.xwork2.defaultactionproxy.prepare(defaultactionproxy.java:177)
        org.apache.struts2.impl.strutsactionproxy.prepare(strutsactionproxy.java:61)
        org.apache.struts2.impl.strutsactionproxyfactory.createactionproxy(strutsactionproxyfactory.java:39)
        com.opensymphony.xwork2.defaultactionproxyfactory.createactionproxy(defaultactionproxyfactory.java:47)
        org.apache.struts2.dispatcher.dispatcher.serviceaction(dispatcher.java:458)
        org.apache.struts2.dispatcher.filterdispatcher.dofilter(filterdispatcher.java:395)
        com.jcxsw.filter.mystrutsprepareandexecutefilter.dofilter(mystrutsprepareandexecutefilter.java:27)
        org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241)
        org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208)
        org.apache.struts2.dispatcher.actioncontextcleanup.dofilter(actioncontextcleanup.java:102)
        org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241)
        org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208)
        org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:218)
        org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:122)
        org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:505)
        org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:169)
        org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:103)
        org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:958)
        org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:116)
        org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:452)
        org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1087)
        org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:637)
        org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:318)
        java.util.concurrent.threadpoolexecutor.runworker(unknown source)
        java.util.concurrent.threadpoolexecutor$worker.run(unknown source)
        org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run(taskthread.java:61)
        java.lang.thread.run(unknown source)