Why different Response HTTP headers?

[SNEAL GOMES]

We have migrated from Tibco BW 5.13 to Tibco BW 5.15.

We have a simple process with 3 steps. HTTP Receiver > Send HTTP Response > End.

After running this in BW 5.13, we get below HTTP Headers in response,

HTTP/1.1 200 OK

Server: Apache-Coyote/1.1

Content-Type: application/soap+xml;charset=UTF-8

Content-Length: 614

Date: Fri, 28 Jul 2023 14:39:07 GMT

However, if we migrate and run same code in 5.15, we get different HTTP Headers in response,

HTTP/1.1 200 

Content-Type: application/soap+xml;charset=UTF-8

Content-Length: 614

Date: Fri, 28 Jul 2023 14:40:21 GMT

Keep-Alive: timeout=2000

Connection: keep-alive

Kindly help me with an explanation to this difference in behavior.