Java 使用嵌入式tomcat运行webflux时出现异步错误

我正在学习webflux和tomcat 9。我用单一方法（API）制作了一个简单的应用程序。 我成功地用嵌入式tomcat运行了它。但当我请求一种方法时，我会出错

这是我的密码：

    NewsRepository newsRepository = new DummyNewsRepository();
    NewsHandler newsHandler = new NewsHandler(newsRepository);
    RouterFunction<ServerResponse> newsRoute = route(GET("/news"), newsHandler::getNews);

    HttpHandler httpHandler = RouterFunctions.toHttpHandler(newsRoute);

    Servlet servlet = new ServletHttpHandlerAdapter(httpHandler);


    Tomcat server = new Tomcat();
    File base = new File(System.getProperty("java.io.tmpdir"));
    Context rootContext = server.addContext("", base.getAbsolutePath());
    Tomcat.addServlet(rootContext, "main", servlet);
    rootContext.addServletMappingDecoded("/", "main");
    server.setHostname("localhost");
    server.setPort(8080);
    server.getConnector();

    server.start();
    server.getServer().await();

---

这最初是由发布在评论中的：

---

ServletHttpHandlerAdapter

未配置为异步处理。 您必须在包装器上将

asyncSupported

属性设置为

true

从

Tomcat.addServlet

返回。然而，我强烈建议 使用Spring Boot，而不是自己尝试这样做

---

ServletHttpHandlerAdapter

未配置为异步处理。您必须在从

Tomcat.addServlet

返回的

Wrapper

上将

asyncSupported

属性设置为

true

。不过，我强烈建议您使用Spring Boot，而不是亲自尝试。@M.Deinum噢，谢谢。成功了。非常感谢。你能把这变成一个正确的答案吗？阅读问题并注意到它们已经解决了，这是相当令人沮丧的

    Sep 27, 2018 11:56:25 AM org.apache.catalina.connector.Request startAsync
WARNING: Unable to start async because the following classes in the processing chain do not support async [org.springframework.http.server.reactive.ServletHttpHandlerAdapter]
java.lang.IllegalStateException: A filter or servlet of the current chain does not support asynchronous operations.
    at org.apache.catalina.connector.Request.startAsync(Request.java:1665)
    at org.apache.catalina.connector.Request.startAsync(Request.java:1657)
    at org.apache.catalina.connector.RequestFacade.startAsync(RequestFacade.java:1043)
    at org.springframework.http.server.reactive.ServletHttpHandlerAdapter.service(ServletHttpHandlerAdapter.java:164)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at 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)
    at java.lang.Thread.run(Thread.java:745)