Question

异常追踪：

＆＃34;＆＃34; java.lang.IllegalStateException：响应后无法转发一直致力于在org.apache.catalina.core.ApplicationDispatcher.doForward（ApplicationDispatcher.java:328）在org.apache.catalina.core.ApplicationDispatcher.forward（ApplicationDispatcher.java:318）在com.zoho.campaign.client.filters.CampaignDomainFilter.doFilter（CampaignDomainFilter.java:140）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在com.zoho.campaign.client.filters.CampaignDefaultFilter.doFilter（CampaignDefaultFilter.java:165）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在com.adventnet.iam.security.SecurityFilter.doFilter（SecurityFilter.java:217）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在com.adventnet.zoho.crmplus.agent.filter.CRMPlusFilter.doFilter（CRMPlusFilter.java:55）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在com.zoho.logs.logclient.filter.AccessLogFilter.doFilter（AccessLogFilter.java:61）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在com.zoho.instrument.InstrumentFilter.doFilter（InstrumentFilter.java:37）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:212）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:106）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）在org.apache.catalina.valves.rewrite.RewriteValve.invoke（RewriteValve.java:480） at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:141） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:79）在org.apache.catalina.authenticator.SingleSignOn.invoke（SingleSignOn.java:240）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:88）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:528）在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1099） at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:672）在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1520）在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run（NioEndpoint.java:1476）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617） at org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）在java.lang.Thread.run（Thread.java:745）

尝试转发RequestDispatcher时获取此异常

出现此问题的原因是什么？

代码：

public void doFilter(ServletRequest req,ServleResponse res,FilterChain filterchain)thorws IOException,Exception
{
String downloaurl="expired";
boolean is_allow_download=false;
HttpServletRequest request=(HttpServletRequest)req;
HttpServletResponse response=(HttpServletResponse)res;
RequestDispatcher rd=null;
if(downloadurl.equals("expired"))
    {
    request.setAttribute("isexpire", "expire");
  }
  else if(downloadurl.equals("no_data"))
     {
       request.setAttribute("isdataAval", false);
  }
     if(url1.contains("export.do") && !downloadurl.equals("no_data") && is_allow_download )
       {
         rdc = request.getRequestDispatcher("users/export.do");
         rdc.forward(request, response);
       }
      rdc = request.getRequestDispatcher("users/closed.do"); 
        rdc.forward(request, response);

}

Answer 1

假设您的堆栈跟踪，您的RS已在您尝试调用forward（）方法之前已提交。您的申请已提前退回RS。

P.S。请添加一些代码段以获取更多上下文。

如何解决Servelts中的非法状态异常

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