Description

We had a problem where we wanted to log a payload to another service via "json_fields", however, the logging handler added the key "message" to the payload so we started having errors.

payload = {"id": 1} logging.info("hello", extra={"json_fields": payload}) # payload becomes {"id": 1, "message": "hello"} 

Proposed solution

Make a copy of the "json_fields" param inside extra before processing it.