java.lang.NoSuchMethodError：javax.servlet.http.HttpServletRequest.startAsync

知道为什么我在运行时遇到这个错误吗？ 我正在尝试在Jetty上部署AsyncServlet。

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.startAsync(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)Ljavax/servlet/AsyncContext; at my.server.SlowServlet.doGet(SlowServlet.java:16) at javax.servlet.http.HttpServlet.service(HttpServlet.java:705) at javax.servlet.http.HttpServlet.service(HttpServlet.java:814) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:480) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110) at org.eclipse.jetty.server.Server.handle(Server.java:345) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533) at java.lang.Thread.run(Thread.java:680) 

我在我的pom.xml中有以下Maven依赖项

   org.eclipse.jetty jetty-server ${jettyVersion}   org.eclipse.jetty jetty-servlet ${jettyVersion}   org.eclipse.jetty jetty-servlets ${jettyVersion}   org.eclipse.jetty jetty-webapp ${jettyVersion}  

Answer 1

我猜你的服务器使用的是Servlet规范的错误版本。 AsyncContext仅在Servlet规范v 3.0之后可用。 您可能在开发环境中拥有正确的版本，但您的服务器使用过时的api版本，因此运行时出错。