NPE in async servlet request on Tomcat

2014-02-04 15:27:28,508 [http-apr-8080-exec-8] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/]- Exception sending request initialized lifecycle event to listener instance of class org.jboss.weld.environment.servlet.Listener
java.lang.NullPointerException
	at org.jboss.weld.context.AbstractBoundContext.deactivate(AbstractBoundContext.java:71)
	at org.jboss.weld.context.http.HttpRequestContextImpl.deactivate(HttpRequestContextImpl.java:70)
	at org.jboss.weld.servlet.HttpContextLifecycle.requestDestroyed(HttpContextLifecycle.java:225)
	at org.jboss.weld.servlet.WeldInitialListener.requestDestroyed(WeldInitialListener.java:118)
	at org.jboss.weld.servlet.api.helpers.ForwardingServletListener.requestDestroyed(ForwardingServletListener.java:38)
	at org.apache.catalina.core.StandardContext.fireRequestDestroyEvent(StandardContext.java:5973)
	at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:283)
	at org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1515)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:523)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1817)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)