java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStarted()Z

错误原因：jetty 的版本和servlet—api版本不同，加载时的顺序不同，先加载servlet-api，而造成的错误。

解决方案：

1、如果是使用的是maven的话，在pom文件中，将jetty的jar包的依赖放在servlet-api的依赖前面
2、如果没有使用maven的话，可以在java build bath->order and export 将jetty的包上移

完整报错日志：

2014-09-15 01:49:15.572:WARN:oejs.ServletHandler:qtp968838231-22: Error for /myapp/index.jsp

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getJspConfigDescriptor()Ljavax/servlet/descriptor/JspConfigDescriptor;

at org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:106)

at org.apache.jasper.compiler.JspConfig.init(JspConfig.java:196)

at org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:259)

at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:166)

at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)

at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:738)

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:551)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:568)

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1111)

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:478)

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1045)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)

at org.eclipse.jetty.server.Server.handle(Server.java:462)

at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:279)

at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:232)

at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:534)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:607)

at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:536)

at java.lang.Thread.run(Thread.java:744)

2014-09-15 01:49:15.574:WARN:oejut.QueuedThreadPool:qtp968838231-22:

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStarted()Z

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:648)