Apache Camel: GET service call using toD() results in infinite loop

Question

I want to read file(s) from a location, extract the fileName & make a rest call (GET) with the fileName as a request parameter. The file name is required to be passed dynamically as each file will be unique. I used toD() after going through the tutorials. The high level pseudo code is provided below (I am just interested with the status code from this call. There's further operations required after this.).

The issue I am facing now using toD() is that it is running into an infinite loop after making the Get service call.

How can this issue be handled? Appreciate your suggestions!

from("file:C:/inbound?delete=true&noop=true")
    .process(new Processor() {
        public void process(Exchange exchange) throws Exception {
            String fileName = exchange.getIn().getHeader("CamelFileName").toString();
            exchange.getIn().setHeader("fileName", fileName);
        }
    })
    .setHeader(Exchange.HTTP_METHOD, simple("GET"))
    .toD("http://localhost:8090/fileWatcher?fileName=${header.fileName}")

Here's a simple Get endpoint mockup running on port 8090:

@RequestMapping(value = "/fileWatcher", method = RequestMethod.GET)
public ResponseEntity<FileDetails> firstService(@RequestParam String fileName) {
    return new ResponseEntity<>(HttpStatus.OK);
}