Question

struts - No action instance

Asked by: johnwinny

Hi All

I'm new to struts framework, I've written a sample program, where UserRegistration.java is the Action class, also written the UserRegistration.jsp.

I've included the following lines in the struts-config.xml, in the action-mapping  section

  <action path="/userRegistration"
                        type="strutsTutorial.UserRegistrationAction">
                  <forward name="success" path="/regSuccess.jsp"/>
                  </action>

I've build and deployed the application in the tomcat 4.1, when I hit the url  http://localhost:8080/strutsTutorial/userRegistration.do

I get the following error.  could anyone pls help in fixing the issue.



SEVERE: No action instance for path /userRegistration could be created
java.lang.NullPointerException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:190)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:282)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1340)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1274)
        at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.jav
a:117)
        at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.
java:143)
        at org.apache.struts.action.RequestProcessor.processActionCreate(Request
Processor.java:280)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
va:218)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:119
4)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:260)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:191)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2396)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:180)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatche
rValve.java:170)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:172)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:174)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:22
3)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:405)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:380)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:508)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:533)
        at java.lang.Thread.run(Thread.java:534)

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Asked On
2005-12-04 at 12:45:45ID21652591
Tags

action

,

instance

,

path

Topic

Java Server Pages (JSP)

Participating Experts
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Points
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Comments
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Answers

 

by: bloodredsunPosted on 2005-12-04 at 13:20:37ID: 15416023

make sure that the class file is in this folder: <tomcat_home>/strutsTutorial/WEB-INF/classes/strutsTutorial/ and then restart the webapp as it looks as thought the class is in the wrong place.

 

by: bloodredsunPosted on 2005-12-04 at 13:21:18ID: 15416029

Typo
<tomcat_home>/webapps/strutsTutorial/WEB-INF/classes/strutsTutorial/

also check your capitalization

 

by: bloodredsunPosted on 2005-12-27 at 12:18:45ID: 15557941

agreed

20120131-EE-VQP-002

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