Vaadin 8.1 and Jasper Reports 6.4.1

Vaadin 6 / 7 / 8
1

I’ve configured a base application with Vaadin 8.1, and Jasper Report library 6.4.1.

The application server (Jetty ver. 9.3.9.v20160517) started correctly, but when i open the browser and navigate to the application i’ve got this WARNING:

ago 11, 2017 2:21:40 PM com.vaadin.server.communication.PushRequestHandler
AVVERTENZA: Failed to initialize Atmosphere for MyUIServlet. Push will not work.
java.lang.RuntimeException: Atmosphere init failed
at com.vaadin.server.communication.PushRequestHandler.initAtmosphere(PushRequestHandler.java:224)
at com.vaadin.server.communication.PushRequestHandler.(PushRequestHandler.java:84)
at com.vaadin.server.VaadinServletService.createRequestHandlers(VaadinServletService.java:53)
at com.vaadin.server.VaadinService.init(VaadinService.java:196)
at com.vaadin.server.VaadinServlet.createServletService(VaadinServlet.java:334)
at com.vaadin.server.VaadinServlet.init(VaadinServlet.java:228)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:640)
at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:496)
at org.eclipse.jetty.servlet.ServletHolder.ensureInstance(ServletHolder.java:788)
at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:773)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:578)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1174)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1106)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:524)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/eclipse/jetty/continuation/ContinuationListener
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:955)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:838)
at com.vaadin.server.communication.PushRequestHandler.initAtmosphere(PushRequestHandler.java:216)
… 33 more
Caused by: java.lang.NoClassDefFoundError: org/eclipse/jetty/continuation/ContinuationListener
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:236)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolveNativeCometSupport(DefaultAsyncSupportResolver.java:319)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolve(DefaultAsyncSupportResolver.java:299)
at org.atmosphere.cpr.AtmosphereFramework.autoDetectContainer(AtmosphereFramework.java:2080)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:914)
… 35 more
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.continuation.ContinuationListener
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:549)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:475)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
… 44 more

2

I got the same error with Vaadin 10.0.6 with jdk 10.0.2 and jetty <jetty.version>9.4.14.v20181114</jetty.version>. Problem was solved for me by including

		<dependency>
				<groupId>org.eclipse.jetty</groupId>
				<artifactId>jetty-continuation</artifactId>
				<version>${jetty.version}</version>
		</dependency>