@GET
@Path("/async")
public void getAsync(@Suspended final AsyncResponse response) {
    Response httpResponse = Response.ok().type(MediaType.TEXT_HTML).build();
    response.resume(httpResponse);
}

Mar 25, 2014 10:42:56 AM io.netty.channel.DefaultChannelHandlerContext invokeExceptionCaught
WARNING: An exception was thrown by a user handler's exceptionCaught() method while handling the following exception:
java.lang.NullPointerException
	at org.jboss.resteasy.plugins.server.netty.RequestHandler.channelRead0(RequestHandler.java:83)
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:103)
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:340)
	at io.netty.channel.DefaultChannelHandlerContext.access$700(DefaultChannelHandlerContext.java:29)
	at io.netty.channel.DefaultChannelHandlerContext$8.run(DefaultChannelHandlerContext.java:331)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:354)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:353)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101)
	at java.lang.Thread.run(Thread.java:744)