Chrome locks up when sending a POST of large file and a "return "redirect: "" is returned from controller [DATAREST-1081]

Kevin Vasko opened DATAREST-1081 and commented

Using this code in a @Controller class.

@PostMapping("/upload-test-bug")
public String handleFileUpload(@RequestParam("file") MultipartFile file,
                               RedirectAttributes redirectAttributes) {

    return "redirect:/";
}

I also put this in my application.properties file.
spring.http.multipart.maxFileSize=16MB
spring.http.multipart.maxRequestSize=16MB

Using Chrome (and Postman plugin). If I issue a post of a small file < 15KB Chrome gets redirected to the appropriate REST URL (in this case /). If I issue a post of a larger file ~4MB Chrome sends the file, and locks up (Chrome uses 100% of a core) and goes into a non-responsive state.

I did some debugging with Wireshark.

When a small file is uploaded I'll see.

1. File upload and associated ACKs
2. Redirect issued (HTTP/1.1 302)
3. ACK from client
4. GET / HTTP/1.1

When a large file (4MB) is uploaded I'll see.

1)File upload and associated ACKs
2) Redirect issued (HTTP/1.1 302)
3) ACK from client
4) .... nothing...

It is almost like Chrome is not taking the redirect correctly. I can reproduce this with a blank Spring Boot 1.5.3 project and the above code in a @controller class.

Affects: 2.6.3 (Ingalls SR3)