Struts 7: error when "s:action" is used on jsp page and jsp is invoked directly in browser

I have a "index.jsp" and invoke an action using "s:action" tag, then render data from this action. In the browser I navigate to this jsp direcly ("http://localhost/index.jsp" instead of browsing to ".../index.action").

Snippet from my JSP:

<s:action name="myAction" var="myActionResult">


  ...
  <s:iterator value="#myActionResult.items">
      </s:iterator><table><tbody>
    <tr>
        <td>
          <s:property value="a">
        </s:property></td>
        <td>
          <s:property value="b">
        </s:property></td>
        <td>
          <s:property value="c">
        </s:property></td>
      </tr>

  </tbody>
</table>


This works with Struts 2. But when migrating this to Struts 7M7, this error is reported:


15:02:27,233 ERROR [io.undertow.request] (default task-1) UT005023: Exception handling request to /Struts7Sample/: org.apache.jasper.JasperException: java.lang.NullPointerException: Cannot invoke "com.opensymphony.xwork2.ActionInvocation.getProxy()" because "invocation" is null
	at [email protected]//org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:461)
	at [email protected]//org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
	at [email protected]//org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
	at [email protected]//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)
	at [email protected]//io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
	at [email protected]//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
	at deployment.Struts7Sample.war//org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.handleRequest(StrutsPrepareAndExecuteFilter.java:160)
	at deployment.Struts7Sample.war//org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.tryHandleRequest(StrutsPrepareAndExecuteFilter.java:146)
	at deployment.Struts7Sample.war//org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:134)
	at [email protected]//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at [email protected]//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at [email protected]//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at [email protected]//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at [email protected]//io.undertow.jsp.JspFileHandler.handleRequest(JspFileHandler.java:32)
	at [email protected]//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
	at [email protected]//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at [email protected]//org.wildfly.elytron.web.undertow.server.ElytronRunAsHandler.lambda$handleRequest$1(ElytronRunAsHandler.java:68)
	at [email protected]//org.wildfly.security.auth.server.FlexibleIdentityAssociation.runAsFunctionEx(FlexibleIdentityAssociation.java:103)
	at [email protected]//org.wildfly.security.auth.server.Scoped.runAsFunctionEx(Scoped.java:161)
	at [email protected]//org.wildfly.security.auth.server.Scoped.runAs(Scoped.java:73)
	at [email protected]//org.wildfly.elytron.web.undertow.server.ElytronRunAsHandler.handleRequest(ElytronRunAsHandler.java:67)
	at [email protected]//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
	at [email protected]//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)
	at [email protected]//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
	at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at [email protected]//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
	at [email protected]//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
	at [email protected]//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
	at org.wildfly.security.elytron-web.undertow-server-servlet@4.1.0.Final//org.wildfly.elytron.web.undertow.server.servlet.CleanUpHandler.handleRequest(CleanUpHandler.java:38)
	at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at [email protected]//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:44)
	at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at [email protected]//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:51)
	at [email protected]//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
	at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:276)
	at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
	at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:132)
	at [email protected]//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
	at [email protected]//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1421)
	at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1421)
	at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1421)
	at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1421)
	at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:256)
	at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:101)
	at [email protected]//io.undertow.server.Connectors.executeRootHandler(Connectors.java:393)
	at [email protected]//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:859)
	at [email protected]//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at [email protected]//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
	at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
	at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
	at [email protected]//org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1282)
	at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: java.lang.NullPointerException: Cannot invoke "com.opensymphony.xwork2.ActionInvocation.getProxy()" because "invocation" is null
	at deployment.Struts7Sample.war//org.apache.struts2.components.Component.getNamespace(Component.java:448)
	at deployment.Struts7Sample.war//org.apache.struts2.components.ActionComponent.executeAction(ActionComponent.java:252)
	at deployment.Struts7Sample.war//org.apache.struts2.components.ActionComponent.end(ActionComponent.java:166)
	at deployment.Struts7Sample.war//org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:39)
	at org.apache.jsp.index_jsp._jspx_meth_s_005faction_005f0(index_jsp.java:171)
	at org.apache.jsp.index_jsp._jspService(index_jsp.java:116)
	at [email protected]//org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at [email protected]//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)
	at [email protected]//org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:422)
	... 53 more




It works if I navigate to "index.action".

Is this intended behavior or a regression? As you can see, I use a WildFly server (WildFly 26 for Struts 2, WildFly 33 for Struts 7)

I can provide full samples for Struts2 and Struts7 if necessary.


Best regards

Wolfgang</s:action>