NoSuchMethodError in CometAsyncServlet

asked 2013-10-25 11:41:07 +0800

avidD
166 ● 2

We are using Comet push for some months now and everything was working fine. But now we gat the following exception on startup of our application:

java.lang.NoSuchMethodError: javax.servlet.ServletContext.addServlet(Ljava/lang/String;Ljava/lang/Class;)Ljavax/servlet/ServletRegistration$Dynamic;
at org.zkoss.zkmax.ui.comet.CometAsyncServlet.install(CometAsyncServlet.java:54)
at org.zkoss.zkmax.init.WebAppInit.init(WebAppInit.java:33)
at org.zkoss.zk.ui.util.Configuration.invokeWebAppInits(Configuration.java:727)
at org.zkoss.zk.ui.impl.AbstractWebApp.init(AbstractWebApp.java:202)
at org.zkoss.zk.ui.http.SimpleWebApp.init(SimpleWebApp.java:58)
at org.zkoss.zk.ui.http.WebManager.<init>(WebManager.java:223)
at org.zkoss.zk.ui.http.HttpSessionListener23.contextInitialized(HttpSessionListener23.java:140)
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:549)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at runjettyrun.Bootstrap.main(Bootstrap.java:97)

When I have a look into the source of the servlet it says that it requires servlet-api 3. However, we use servlet-api 2.5 and that we did all the time. I am now wondering how this can happen. Is there some other initialization of the comet api that does not use this method and that maybe was used up to now?

Thanks beforehand, David