Incorrect zip file being created in Vertx [3.x] from a HTTP Request

Question

I am trying the below code with vertx 3.9.10 and it does not seem to write to the zipfile however the file gets created correctly. The pipeTo eventHandler is never called and i keep getting 202 in the client instead of 200.

@Override
public Handler<RoutingContext> createHandler() {
    return rtx -> {
        HttpServerRequest req = rtx.request();
        HttpServerResponse res = rtx.response();
        FileSystem fs = vertx.fileSystem();
        log.info("-- Starting file upload -- ");
        String filename = "file" + System.currentTimeMillis() + ".zip";
        req.pause();
        fs.open(filename
                , new OpenOptions()
                , ares -> {
                        AsyncFile afile = ares.result();
                        log.info("File Created:" + filename);
                        req.pipeTo(afile,event -> {
                            afile.close(event1 -> {
                                log.info("I am in ...." +req.isEnded());
                                req.response().end();
                            });
                        });
                        req.response().setStatusCode(202).end();
                });
    };
}

As soon as i try to attach a handler to the request below i keep after the pipeTo i get a java.lang.IllegalStateException: Request has already been read

req.endHandler(v1 -> afile.close(v2 -> {
                                log.info("Uploaded Finished!! ");
                                req.response().end();
                            }));

What is being done incorrectly here?? How can this be corrected ??