Servlet.service() для сервлета jsp исключение исключения java.lang.IllegalStateException

Question

У меня есть контроллер, который обрабатывает длинный механизм опроса, используя Springs DeferredResult. В то время, когда я называю метод контроллера несколько раз я получаю ниже исключение:

java.lang.IllegalStateException: getOutputStream() has already been called for this response

Так есть вызов views/getLongPollingGraphData который проходит несколько идентификаторов и возвращается с ответом JSon на один или ни одного идентификатора. Когда я загружаю страницу несколько раз, что вызывает этот URL-адрес несколько раз, я получаю исключение выше.

Проблема, с которой я сталкиваюсь, заключается в использовании обратного вызова onCompletion на DeferredResult, чтобы удалить DeferredResult с карты, когда он либо истечет, либо на него установлен ответ. Но в случае этого исключения onCompletion не вызывается, и он остается на карте. Я читал разные сообщения о этом исключении, но я не мог относиться ни к одному из них.

Ниже приведена вся трассировка стека исключения и части моего метода контроллера.

Nov 07, 2016 9:52:06 AM org.apache.catalina.core.ApplicationDispatcher invoke 
SEVERE: Servlet.service() for servlet jsp threw exception 
java.lang.IllegalStateException: getOutputStream() has already been called for this response 
    at org.apache.catalina.connector.Response.getWriter(Response.java:648) 
    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:213) 
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:104) 
    at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125) 
    at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118) 
    at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:186) 
    at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:126) 
    at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:80) 
    at org.apache.jsp.WEB_002dINF.jsp.ClientAbortException_jsp._jspService(ClientAbortException_jsp.java:136) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604) 
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:543) 
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:229) 
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264) 
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208) 
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:659) 
    at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:625) 
    at org.apache.catalina.core.AsyncContextImpl$1.run(AsyncContextImpl.java:239) 
    at org.apache.catalina.core.AsyncContextImpl.doInternalDispatch(AsyncContextImpl.java:382) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:215) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:299) 
    at org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1652) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745) 


Nov 07, 2016 9:52:06 AM org.apache.catalina.core.ApplicationDispatcher invoke 
SEVERE: Servlet.service() for servlet main-dispatcher threw exception 
java.lang.IllegalStateException: getOutputStream() has already been called for this response 
    at org.apache.catalina.connector.Response.getWriter(Response.java:648) 
    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:213) 
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:104) 
    at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125) 
    at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118) 
    at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:186) 
    at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:126) 
    at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:80) 
    at org.apache.jsp.WEB_002dINF.jsp.ClientAbortException_jsp._jspService(ClientAbortException_jsp.java:136) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604) 
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:543) 
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:229) 
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264) 
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208) 
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:659) 
    at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:625) 
    at org.apache.catalina.core.AsyncContextImpl$1.run(AsyncContextImpl.java:239) 
    at org.apache.catalina.core.AsyncContextImpl.doInternalDispatch(AsyncContextImpl.java:382) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:215) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:299) 
    at org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1652) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745) 


Nov 07, 2016 9:52:06 AM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet [main-dispatcher] in context with path [/test-web] threw exception [java.lang.IllegalStateException: getOutputStream() has already been called for this response] with root cause 
java.lang.IllegalStateException: getOutputStream() has already been called for this response 
    at org.apache.catalina.connector.Response.getWriter(Response.java:648) 
    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:213) 
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:104) 
    at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125) 
    at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118) 
    at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:186) 
    at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:126) 
    at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:80) 
    at org.apache.jsp.WEB_002dINF.jsp.ClientAbortException_jsp._jspService(ClientAbortException_jsp.java:136) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604) 
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:543) 
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:229) 
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264) 
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208) 
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748) 
    at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:659) 
    at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:625) 
    at org.apache.catalina.core.AsyncContextImpl$1.run(AsyncContextImpl.java:239) 
    at org.apache.catalina.core.AsyncContextImpl.doInternalDispatch(AsyncContextImpl.java:382) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:215) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:299) 
    at org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1652) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745) 

метод управления:

@RequestMapping(value = "views/getLongPollingGraphData", method = RequestMethod.GET, headers = "Accept=application/json") 
@ResponseBody 
public DeferredResult<WebServiceResponse> getLongGraphData(
     HttpServletRequest request, 
     @RequestParam(value = "ids") String ids) 
    throws Exception 
{ 
    //perform operations 

    //set time out this DeferredResult, after 5 seconds 
    final DeferredResult<WebServiceResponse> deferredResult = new DeferredResult<WebServiceResponse>(5000L, awrDefault); 
    //listOfViews is a list containing ids 
    mMapOfDeferredResultAndViews.put(deferredResult, listOfViews); 
    //more operations 

    deferredResult.onCompletion(new Runnable() { 
     @Override 
     public void run() 
     { 
      mMapOfDeferredResultAndViews.remove(deferredResult); 
     } 
    }); 

    return deferredResult; 
} 

Edit: Я думаю, что org.apache.catalina.connector.ClientAbortException брошено в какой-то момент, когда страница постоянно обновляется. Я использую org.springframework.web.servlet.handler.SimpleMappingExceptionResolver для обработки его на странице jsp. Ниже приведен код:

основного диспетчеру-servlet.xml

<bean 
    class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> 
    <property name="exceptionMappings"> 
     <props> 
      <prop key="java.lang.Exception">Exception</prop> 
      <prop key="org.apache.catalina.connector.ClientAbortException">ClientAbortException</prop> 
     </props> 
    </property> 
</bean> 

ClientAbortException.jsp

<%@page import="org.slf4j.LoggerFactory"%> 
<%@page import="org.slf4j.Logger"%> 
<%@page import="com.test.model.messages.Messages"%> 
<%@page import="java.util.Enumeration"%> 
<%@page import="org.codehaus.jackson.map.ObjectMapper"%> 
<%@page import="com.test.model.exceptions.TestException"%> 
<%@page import="com.test.web.exchange.WebServiceResponse"%> 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
    pageEncoding="ISO-8859-1"%> 
<% 
    Logger LOGGER = LoggerFactory.getLogger(this.getClass()); 
    LOGGER.debug("Exception caught in JSP: ", (Exception) request.getAttribute("exception")); 

    boolean bReturnJson = false; 

    Enumeration<?> headerNames = request.getHeaderNames(); 

    while (headerNames.hasMoreElements()) { 
     String headerName = (String) headerNames.nextElement(); 

     if (headerName.equals("accept")) { 
      if (request.getHeader(headerName).equals(
        "application/json; charset=utf-8")) { 
       bReturnJson = true; 
      } 

      break; 
     } 
    } 

    if (bReturnJson) { 
     WebServiceResponse awsr = new WebServiceResponse(); 

     TestException exception = new TestException(
       Messages.ERROR.toString(), 
       (Exception) request.getAttribute("exception")); 

     awsr.setException(exception); 

     ObjectMapper mapper = new ObjectMapper(); 
     out.write(mapper.writeValueAsString(awsr)); 
    } else { 
     ((Exception) request.getAttribute("exception")).printStackTrace(); 
%> 

HTML error! 

<% 
      } 
%> 

Answer 1

Проблема очевидна:

http://docs.oracle.com/javaee/7/api/javax/servlet/ServletRequest.html#getInputStream--

Броски : IllegalStateException - если метод getReader() уже был вызван для этого запроса

Чтобы выяснить, что фильтр (или нечто подобное) вызывает метод getReader(), прежде чем ваш JSP сервлет делает, установить точку останова на IllegalStateException. Позвоните в JSP. В стеке вызовов отладчика найдите конкретный класс реализации интерфейса ServletRequest (это конкретный контейнер). Установите точку останова для getReader(), затем снова вызовите свой JSP, и вы получите основную причину.

Если вы действительно должны вызвать getReader() или getInputStream() несколько раз подряд, HttpServletRequestWrapper может помочь вам, смотри, например:

How to read InputStream multiple times

https://gist.github.com/calo81/2071634

Без вашего проекта весь код NO- один сможет узнать причину этого Исключения.