Hello All 
I am struggling now with enabling Atmosphere/Comet in my Vaadin application.
First of all I will put what I found in logs:
12:34:57,567 INFO [org.apache.coyote.http11.Http11AprProtocol]
(MSC service thread 1-2) Starting Coyote HTTP/1.1 on http-/127.0.0.1:8080
...
12:35:40,822 SEVERE [org.atmosphere.container.JBossWebCometSupport]
(http-/127.0.0.1:8080-2) HttpEvent is null, JBoss APR Not Properly installed
12:35:40,824 WARNING [org.atmosphere.cpr.AtmosphereFramework]
(http-/127.0.0.1:8080-2) Failed using comet support: org.atmosphere.container.JBossWebCometSupport, error: JBoss failed to detect this is a Comet application because the APR Connector is not enabled.
Make sure atmosphere-compat-jboss.jar is not under your WEB-INF/lib and You must use the atmosphere-native-runtime dependency in order to use native Comet Support
there is no context.xml under WEB-INF Is the NIO or APR Connector enabled?
12:35:40,837 SEVERE [org.atmosphere.cpr.AtmosphereFramework]
(http-/127.0.0.1:8080-2) If you have more than one Connector enabled, make sure they both use the same protocol, e.g NIO/APR or HTTP for all. If not, org.atmosphere.container.BlockingIOCometSupport will be used and cannot be changed.: java.lang.IllegalStateException: JBoss failed to detect this is a Comet application because the APR Connector is not enabled.
Make sure atmosphere-compat-jboss.jar is not under your WEB-INF/lib and You must use the atmosphere-native-runtime dependency in order to use native Comet Support
there is no context.xml under WEB-INF
at org.atmosphere.container.JBossWebCometSupport.<clinit>(JBossWebCometSupport.java:51) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [rt.jar:1.7.0_40]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [rt.jar:1.7.0_40]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.7.0_40]
at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [rt.jar:1.7.0_40]
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:230) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolveNativeCometSupport(DefaultAsyncSupportResolver.java:306) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolve(DefaultAsyncSupportResolver.java:286) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at org.atmosphere.cpr.AtmosphereFramework.autoDetectContainer(AtmosphereFramework.java:1870) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:888) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:780) [atmosphere-runtime-native-2.2.4.vaadin5.jar:2.2.4.vaadin5]
at com.vaadin.server.communication.PushRequestHandler.<init>(PushRequestHandler.java:126) [vaadin-server-7.4.4.jar:7.4.4]
at com.vaadin.server.VaadinServletService.createRequestHandlers(VaadinServletService.java:80) [vaadin-server-7.4.4.jar:7.4.4]
at com.vaadin.server.VaadinService.init(VaadinService.java:188) [vaadin-server-7.4.4.jar:7.4.4]
at com.vaadin.server.VaadinServlet.createServletService(VaadinServlet.java:303) [vaadin-server-7.4.4.jar:7.4.4]
at com.vaadin.server.VaadinServlet.init(VaadinServlet.java:209) [vaadin-server-7.4.4.jar:7.4.4]
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1202) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:952) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:188) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:634) [jbossweb-7.0.17.Final-redhat-1.jar:]
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2039) [jbossweb-7.0.17.Final-redhat-1.jar:]
at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_40]
12:35:40,960 WARNING [org.atmosphere.cpr.AtmosphereFramework]
(http-/127.0.0.1:8080-2) Using org.atmosphere.container.BlockingIOCometSupportThis is my log file. Now configuration (standalone.xml) of Jboss EAP 6.0
<subsystem xmlns="urn:jboss:domain:web:1.2" default-virtual-server="default-host" native="true">
<connector name="http" protocol="HTTP/1.1" scheme="http" socket-binding="http"/>
<virtual-server name="default-host" enable-welcome-root="false">
<alias name="localhost"/>
<alias name="example.com"/>
</virtual-server>
</subsystem>
Now list of WEB-INF/lib folder in my app:
aceeditor-0.8.14.jar
aopalliance-1.0.jar
atmosphere-compat-tomcat-2.0.1-vaadin1.jar
atmosphere-compat-tomcat7-2.0.1-vaadin1.jar
atmosphere-runtime-native-2.2.4.vaadin5.jar
columnlayout-addon-0.1.7.jar
commons-codec-1.10.jar
commons-httpclient-3.1.jar
commons-io-1.3.2.jar
commons-lang3-3.3.2.jar
commons-logging-1.2.jar
confirmdialog-2.1.2.jar
diffutils-1.2.1.jar
flute-1.3.0.gg2.jar
gson-2.2.4.jar
guava-16.0.1.vaadin1.jar
guava-18.0.jar
hamcrest-core-1.3.jar
httpclient-4.3.6.jar
httpcore-4.3.3.jar
jboss-as-websockets-0.5.jar
JsonContainer-0.1.jar
jsoup-1.8.1.jar
junit-4.12.jar
mbassador-1.2.1.jar
ojdbc7.jar
sac-1.3.jar
slf4j-api-1.6.1.jar
spring-aop-4.1.0.RELEASE.jar
spring-beans-4.1.0.RELEASE.jar
spring-context-4.1.0.RELEASE.jar
spring-core-4.1.0.RELEASE.jar
spring-expression-4.1.0.RELEASE.jar
spring-jdbc-4.1.6.RELEASE.jar
spring-test-4.1.6.RELEASE.jar
spring-tx-4.1.6.RELEASE.jar
spring-web-4.1.0.RELEASE.jar
streamhtmlparser-jsilver-0.0.10.vaadin1.jar
vaadin-client-7.4.4.jar
vaadin-push-7.4.4.jar
vaadin-sass-compiler-0.9.12.jar
vaadin-server-7.4.4.jar
vaadin-shared-7.4.4.jar
vaadin-slf4j-jdk14-1.6.1.jar
vaadin-themes-7.4.4.jar
validation-api-1.0.0.GA-sources.jar
validation-api-1.0.0.GA.jar
wizards-for-vaadin-1.1.0.jarAll right after this whole bunch of code list, doea anyone could tell what I do wrong? I cannot launch Comet in my enviroment. 
Looking forward to hearing from you guys!
Kamil
I cannot use NIO because EAP 6.0 does not support it. I tried to use this instructions