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POStruts2 action could not execute when redirect (with interceptor) an action to other
 

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    <p>I send a request to the <code>ActLand</code>, then <code>intercept()</code>, if not logged in then redirect to <code>Login.jsp</code>.</p> <p><strong>The <code>struts.xml</code>:</strong></p> <p></p> <pre><code>&lt;struts&gt; &lt;package name="default" extends="struts-default"&gt; &lt;interceptors&gt; &lt;interceptor name="login" class="com.interceptor.LoginInterceptor"/&gt; &lt;interceptor-stack name="loginStack"&gt; &lt;interceptor-ref name="login"/&gt; &lt;/interceptor-stack&gt; &lt;/interceptors&gt; &lt;default-interceptor-ref name="loginStack"/&gt; &lt;global-results&gt; &lt;result name="loginRedirect" type="redirect"&gt;/login.jsp&lt;/result&gt; &lt;/global-results&gt; &lt;action name="ActLand" class="com.action.ActLand"&gt; &lt;result name="ok"&gt;/index.jsp&lt;/result&gt; &lt;/action&gt; &lt;action name="ActLogin" class="com.action.ActLogin"&gt; &lt;result name="ok"&gt;/index.jsp&lt;/result&gt; &lt;result name="fail"&gt;/login.jsp&lt;/result&gt; &lt;/action&gt; &lt;/package&gt; &lt;/struts&gt; </code></pre> <p><strong>The interceptor:</strong></p> <pre><code>public class LoginInterceptor extends AbstractInterceptor { @Override public String intercept(final ActionInvocation invocation) throws Exception { Map&lt;String, Object&gt; session = ActionContext.getContext().getSession(); int userId = -1; if (session.get("userId") != null) { userId = Integer.parseInt(session.get("userId").toString()); } Object action = invocation.getAction(); if (userId &lt; 0) { return "loginRedirect"; } else if (!(action instanceof ActLogin)) { return "loginRedirect"; } return invocation.invoke(); } </code></pre> <p><strong>The Error:</strong></p> <pre><code>SEVERE: Could not execute action: /ActLand java.lang.IllegalStateException at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:473) at javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138) at org.apache.struts2.dispatcher.ServletRedirectResult.sendRedirect(ServletRedirectResult.java:217) at org.apache.struts2.dispatcher.ServletRedirectResult.doExecute(ServletRedirectResult.java:197) at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186) at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) at org.apache.struts2.components.ActionComponent.executeAction(ActionComponent.java:289) at org.apache.struts2.components.ActionComponent.end(ActionComponent.java:172) at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42) at org.apache.jsp.index_jsp._jspx_meth_s_005faction_005f0(index_jsp.java:152) at org.apache.jsp.index_jsp._jspx_meth_s_005fif_005f0(index_jsp.java:120) at org.apache.jsp.index_jsp._jspService(index_jsp.java:83) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:317) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:204) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:182) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:311) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) </code></pre> <p>I'm sorry, I believe I did every thing that I had been instructed to, but things are complicated...</p>
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