Spring RestTemplate forming Invalid Header - tcpdump

Question

In my application for REST call following code is there:
ResponseEntity< String > entity = restTemplate.exchange( uri,
method, httpEntity, String.class );
The uri is proper, method is HttpMethod.GET, httpEntity is null.
On taking TCP Dump following info I got:
E..E.%#...Pc
.A.
.A|...Pt|YX...u.....a.....
c+.t$Je.GET /{uri} HTTP/1.1
05:57:34.986440 IP (tos 0x0, ttl 255, id 37158, offset 0, flags [DF], proto TCP (6), length 8244)
{hostname} > {targetIp}: Flags [P.], seq 274:8466, ack 1, win 211, options [nop,nop,TS val 1663813748 ecr 608855467], length 8192
E. 4.&#...1s
.A.
.A|...Pt|Zi...u.....P.....
c+.t$Je.Accept: text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, text/plain, te
05:57:34.986451 IP (tos 0x0, ttl 255, id 37159, offset 0, flags [DF], proto TCP (6), length 658)
It seems the text/plain is getting appending after sometime and grows from single occurrence to multiple times till Accept: header length limits
Jar: spring-web-4.3.2.RELEASE.jar
I am getting 400 status on this. Any help would be appreciated.

Answer 1

got the solution for my problem. It was something similar to
Spring Boot singleton RestTemplate Accept Header keeps being appended to
At some other place following code was there
restTemplate.getMessageConverters().add(0, new StringHttpMessageConverter(Charset.forName("UTF-8")));
where restTemplate was autowired and thus header was getting corrupted.