VAADIN Push problem - ContextNotActiveException

I´m using Vaadin 7.5.8 on Wildfly 9.0.2. In our application we need Push support, so I´ve added the maven dependency

<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>

and added PushMode Parameter to servlet initialization.

@WebServlet(value = {"/ui/*", "/VAADIN/*"}, asyncSupported = true, initParams = {
    @WebInitParam(name = "UIProvider", value = "com.vaadin.cdi.CDIUIProvider"),
    @WebInitParam(name = "pushmode", value = "automatic")
})

On application start i will see the login page of our application. From this point each action that causes a server communication end with this error:

Caused by: javax.enterprise.context.ContextNotActiveException: WebBeans context with scope type annotation @SessionScoped does not exist within current thread
    at org.apache.webbeans.container.BeanManagerImpl.getContext(BeanManagerImpl.java:330) ~[openwebbeans-impl-1.2.7.jar:1.2.7]
    at org.apache.webbeans.intercept.NormalScopedBeanInterceptorHandler.getContextualInstance(NormalScopedBeanInterceptorHandler.java:88) ~[openwebbeans-impl-1.2.7.jar:1.2.7]
    at org.apache.webbeans.intercept.NormalScopedBeanInterceptorHandler.get(NormalScopedBeanInterceptorHandler.java:70) ~[openwebbeans-impl-1.2.7.jar:1.2.7]
    at com.vaadin.cdi.internal.BeanStoreContainer$$OwbNormalScopeProxy0.getUIBeanStore(com/vaadin/cdi/internal/BeanStoreContainer.java) ~[na:1.0.3]
    at com.vaadin.cdi.internal.UIScopedContext.get(UIScopedContext.java:97) ~[vaadin-cdi-1.0.0.alpha2.jar:1.0.3]
    at org.apache.webbeans.container.BeanManagerImpl.getReference(BeanManagerImpl.java:754) ~[openwebbeans-impl-1.2.7.jar:1.2.7]
    at org.apache.webbeans.inject.instance.InstanceImpl.get(InstanceImpl.java:139) ~[openwebbeans-impl-1.2.7.jar:1.2.7]

Everything works fine, when i remove the push parameter from the servlet configuration. Is there something wrong with my push configuration?
 

I just encountered this issue while developing a push-enabled app on TomEE as well: 

SEVERE: 
java.lang.RuntimeException: javax.enterprise.context.ContextNotActiveException: WebBeans context with scope type annotation @SessionScoped does not exist within current thread
    at sk.baka.aedictweb.MyUI.handleUserInputException(MyUI.java:239)
    at sk.baka.aedictweb.login.LoginForm$1.leftClick(LoginForm.java:85)
    at sk.baka.aedictweb.util.vaadin.LeftClickListener.buttonClick(LeftClickListener.java:21)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
    at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1003)
    at com.vaadin.ui.Button.fireClick(Button.java:377)
    at com.vaadin.ui.Button$1.click(Button.java:54)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:408)
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:273)
    at com.vaadin.server.communication.PushHandler$2.run(PushHandler.java:149)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:243)
    at com.vaadin.server.communication.PushHandler.onMessage(PushHandler.java:503)
    at com.vaadin.server.communication.PushAtmosphereHandler.onMessage(PushAtmosphereHandler.java:88)
    at com.vaadin.server.communication.PushAtmosphereHandler.onRequest(PushAtmosphereHandler.java:78)
    at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:199)
    at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:107)
    at org.atmosphere.container.TomcatWebSocketUtil.doService(TomcatWebSocketUtil.java:154)
    at org.atmosphere.container.Tomcat7Servlet30SupportWithWebSocket.service(Tomcat7Servlet30SupportWithWebSocket.java:62)
    at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:2075)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:571)
    at org.atmosphere.websocket.DefaultWebSocketProcessor$3.run(DefaultWebSocketProcessor.java:333)
    at org.atmosphere.util.VoidExecutorService.execute(VoidExecutorService.java:101)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:328)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:425)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatchReader(DefaultWebSocketProcessor.java:795)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:527)
    at org.atmosphere.container.TomcatWebSocketHandler.onTextData(TomcatWebSocketHandler.java:104)
    at org.apache.catalina.websocket.StreamInbound.doOnTextData(StreamInbound.java:191)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:139)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:88)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:616)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.enterprise.context.ContextNotActiveException: WebBeans context with scope type annotation @SessionScoped does not exist within current thread
    at org.apache.webbeans.container.BeanManagerImpl.getContext(BeanManagerImpl.java:330)
    at org.apache.webbeans.intercept.NormalScopedBeanInterceptorHandler.getContextualInstance(NormalScopedBeanInterceptorHandler.java:88)
    at org.apache.webbeans.intercept.NormalScopedBeanInterceptorHandler.get(NormalScopedBeanInterceptorHandler.java:70)
    at sk.baka.aedictweb.login.LoginLogoutManager$$OwbNormalScopeProxy0.login(sk/baka/aedictweb/login/LoginLogoutManager.java)
    at sk.baka.aedictweb.login.LoginForm$1.leftClick(LoginForm.java:81)
    ... 46 more

Is there any way to somehow "re-connect" the WebBeans context to the current session?

There are others with the same issue: https://vaadin.com/forum/#!/thread/3984742/3984741

I believe this to be a bug, I have created a bug report here: https://dev.vaadin.com/ticket/19473

It seems that this is really a problem in JavaEE spec. So, the solution seems to either use @UIScoped or disable Push and use long-polling, until JavaEE resolves this.

@Push(transport = Transport.LONG_POLLING) works, cool :) I have yet to see if the performance is altered in any way.