Spring oauth2 refresh token - Cannot convert access token to JSON

Question

I\'m trying to use a refresh token in a Spring OAuth application without success. The system will issue a refresh token on a password grant:

  {
  \"access_t         


        

Answer 1

So it looks like the issue was an invalid refresh_token format. Due to my config, what the auth server was expecting was a valid JWT, whereas I was sending it a plain bearer token. Hence the error message 'cannot convert token to JSON'.

Incidentally, I found this document useful in understanding how all the parts of Spring OAuth fit together, which led me to figuring out what was going on here:

https://github.com/spring-projects/spring-security-oauth/blob/master/docs/oauth2.md