java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.startAsync
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java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.startAsync
提问by Soumya Simanta
Any idea why I'm getting this error at runtime ? I'm trying to deploy an AsyncServlet on Jetty.
知道为什么我在运行时收到这个错误吗？我正在尝试在 Jetty 上部署一个 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$RequestHandler.headerComplete(HttpConnection.java:919)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:44)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:533)
at java.lang.Thread.run(Thread.java:680)
I've the following Maven dependencies in my pom.xml
我的 pom.xml 中有以下 Maven 依赖项
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>${jettyVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>${jettyVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlets</artifactId>
<version>${jettyVersion}</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-webapp</artifactId>
<version>${jettyVersion}</version>
</dependency>
回答by Jeshurun
I'm guessing your server is using the wrong version of the Servlet spec. AsyncContext is only available since Servlet spec v 3.0. You probably have the right version in your development environment, but your server uses an outdated version of the api, hence the error at runtime.
我猜您的服务器使用了错误版本的 Servlet 规范。AsyncContext 仅从 Servlet 规范 v 3.0 开始可用。您的开发环境中可能有正确的版本，但您的服务器使用了过时的 api 版本，因此在运行时出现错误。
