I'm working on the Jetty side, with a goal of getting websocket (server and client) integrated properly for CDI/weld.

When setting up Weld for all contexts as a server component on Jetty, there is a NoSuchElementException thrown from the
WeldServletLifecycle.java (line 137)

deployment.getBeanDeploymentArchives().iterator().next()

Some other notes:
Starting with Jetty 9.2.4, the Decorator will be exposed, by default, for all WebAppClassloaders, no need for that extra XML recommendation seen in other jiras.

We're also working on a server side "cdi" module (that can be enabled easily) which will also expose a META-INF/services/org.jboss.weld.environment.Container with the org.jboss.weld.environment.jetty.JettyContainer value (available on server classloader when cdi module is enabled)

Anyway, here's the default log level and stacktrace seen.
What does this mean?

2014-10-09 14:41:46.307:WARN:oeja.AnnotationConfiguration:main: ServletContainerInitializers: detected. Class hierarchy: empty
Oct 09, 2014 2:41:46 PM org.jboss.weld.environment.servlet.EnhancedListener onStartup
INFO: WELD-ENV-001008: Initialize Weld using ServletContainerInitializer
Oct 09, 2014 2:41:46 PM org.jboss.weld.bootstrap.WeldStartup <clinit>
INFO: WELD-000900: 2.2.5 (Final)
Oct 09, 2014 2:41:46 PM org.jboss.weld.bootstrap.WeldStartup startContainer
INFO: WELD-000101: Transactional services not available. Injection of @Inject UserTransaction not available. Transactional observers will be invoked synchronously.
Oct 09, 2014 2:41:46 PM org.jboss.weld.interceptor.util.InterceptionTypeRegistry <clinit>
WARN: WELD-001700: Interceptor annotation class javax.ejb.PostActivate not found, interception based on it is not enabled
Oct 09, 2014 2:41:46 PM org.jboss.weld.interceptor.util.InterceptionTypeRegistry <clinit>
WARN: WELD-001700: Interceptor annotation class javax.ejb.PrePassivate not found, interception based on it is not enabled
2014-10-09 14:41:46.572:WARN:oeja.ServletContainerInitializersStarter:main:
java.util.NoSuchElementException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:929)
at java.util.HashMap$KeyIterator.next(HashMap.java:960)
at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1067)
at org.jboss.weld.environment.servlet.WeldServletLifecycle.initialize(WeldServletLifecycle.java:137)
at org.jboss.weld.environment.servlet.EnhancedListener.onStartup(EnhancedListener.java:60)
at org.eclipse.jetty.plus.annotation.ContainerInitializer.callStartup(ContainerInitializer.java:140)
at org.eclipse.jetty.annotations.ServletContainerInitializersStarter.doStart(ServletContainerInitializersStarter.java:65)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:274)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1342)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1335)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)