spring boot @RestController and short string response issue

When controller returns bytes shorter than 171 bytes, curl can't get the response.

$ curl -v http://localhost:8080/l\?n=170
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /l?n=170 HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 200
< Content-Type: text/plain;charset=UTF-8
< Content-Length: 170
< Date: Tue, 28 Nov 2017 07:11:38 GMT
<
* Connection #0 to host localhost left intact

Curl can get the bytes when the server returns 171+ bytes.

$ curl -v http://localhost:8080/l\?n=171
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /l?n=171 HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 200
< Content-Type: text/plain;charset=UTF-8
< Content-Length: 171
< Date: Tue, 28 Nov 2017 07:11:41 GMT
<
* Connection #0 to host localhost left intact
..........................................................................................................................................................................

with telnet

n=170 HTTP/1.0

$ telnet localhost 8080
Trying ::1...
Connected to localhost.
Escape character is '^]'.
GET /l?n=170 HTTP/1.0

HTTP/1.1 200
Content-Type: text/plain;charset=UTF-8
Content-Length: 170
Date: Tue, 28 Nov 2017 07:31:29 GMT
Connection: close

..........................................................................................................................................................................Connection closed by foreign host.

Note

This issue is reproduced on OSX curl only. It's not reproduced on linxu curl.