Now JEP 308 has been merged as draft, we should double check the code does comply to the spec.

At least:

• Test cover the expected http status codes described in the specification
  • Example: send data too big and expect the HTTP 413 status code (see https://github.com/jenkinsci/jep/tree/master/jep/308#maximum-message-size)
• Retrieve and log instance identity along with the log for correlation