The following example servlet demonstrates the problem. When accessing this servlet, there will be a NPE on the console/cataling log: java.lang.NullPointerException at org.jboss.weld.context.AbstractBoundContext.deactivate(AbstractBoundContext.java:71) at org.jboss.weld.context.http.HttpRequestContextImpl.deactivate(HttpRequestContextImpl.java:86) at org.jboss.weld.servlet.WeldListener.requestDestroyed(WeldListener.java:103) at org.jboss.weld.servlet.api.helpers.ForwardingServletListener.requestDestroyed(ForwardingServletListener.java:42) 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$AbstractConnectionHandler.process(AbstractProtocol.java:523) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1575) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) An example servlet: package com.kobil.ssms.asm.presentation.b2b; import java.io.IOException; import javax.servlet.AsyncContext; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet(asyncSupported = true, urlPatterns = "/weldasync") public class WeldAsyncServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { final AsyncContext async = request.startAsync(request, response); Runnable asyncRunnable = new Runnable() { @Override public void run() { async.complete(); } }; async.start(asyncRunnable); } }