Facing error "Unsupported Media Type" while not sending the content-type in APIs header using JMeter

[islam-tenovos]

Expected behavior

JMeter should not append/add the content-type it self when it is not configured in header.

Actual behavior

JMeter is sending a content-type automatically when it is not configured in the header and in the result an error occurred as APIs do not need the content type header with below error.

{ "statusCode": 415, "code": "FST_ERR_CTP_INVALID_MEDIA_TYPE", "error": "Unsupported Media Type", "message": "Unsupported Media Type: application/x-www-form-urlencoded; charset=UTF-8" }

Steps to reproduce the problem

Create a JMeter test plan with a thread group and add a HTTP request type(Post, delete etc.) with header manager having no Content-type header.

JMeter Version

5.6.2

Java Version

openJDK version 17

OS Version

Amazon linux 2