我是JavaEE 6的新手,并且我了解到它支持名为AsyncServlets的异步servlet。 所以我试着用JavaEE6创建一个小程序。异步Servlet异常
这是我为servlet
@WebServlet(name = "AsyncServlet", urlPatterns = {"/AsyncServlet"}, asyncSupported=true)
public class AsyncServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
AsyncContext aCtx = request.startAsync(request, response);
Executor executor = Executors.newSingleThreadExecutor();
executor.execute(new MyClass(aCtx));
System.out.println("Original thread is freed");
}
}
但是当我尝试运行的servlet我得到一个异常java.lang.IllegalStateException代码:不支持。我使用tomcat 7.0.14作为服务器。我没有创建一个web.xml。此代码中的问题在哪里?
编辑:
这是异常的全堆栈跟踪
SEVERE: Servlet.service() for servlet [AsyncServlet] in context with path [/AsyncTest] threw exception
java.lang.IllegalStateException: Not supported.
at org.apache.catalina.connector.Request.startAsync(Request.java:1618)
at org.apache.catalina.connector.RequestFacade.startAsync(RequestFacade.java:1031)
at javax.servlet.ServletRequestWrapper.startAsync(ServletRequestWrapper.java:379)
at com.icbt.demo.servlet.AsyncServlet.doGet(AsyncServlet.java:30)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
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.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$Http11ConnectionHandler.process(Http11Protocol.java:204)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:311)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
我在你的代码中看不到任何问题(除了为每个请求创建一个线程池并且从不关闭它!) - 你可以发布引发异常的完整堆栈跟踪吗? –
你确定'asyncSupported'属性被设置为'true'吗?尝试重新启动/重新编译以确保它被反映出来。你的servlet适用于我,但是当使用asyncSupported = false时,我得到了同样的错误。 –
@ Tomasz是的..即使我创建了一个新的应用程序,问题仍然存在。无论如何它在glassfish 3.1.2.1中工作似乎有点不对劲服务器 – Krishan