Refresh Token - 401 - Error

[alexshani]

Hi everyone, I'm trying to use the refresh token and I get a 401 error. { ' access_denied' }

I'm sending a POST request with 

"Content-type": "application/x-www-form-urlencoded"

and

{ grant_type: 'refresh_token' , client_id, client_secret, refresh_token }

The error is not so informative and I don't know what I'm doing wrong

please help

[Tony Chatfield1]

Hi, testing with Postman and a PDI; I am able to successfully refresh a token using the Content type and parameters you have listed. Are you 'Post'ing to /oauth_token.do

[alexshani]

Thanks for the response, every third request if failing and I get access_denied. I'm sending a post request to /oauth_token.do with the same parameters you do and the refresh process if failing. what can be the reason? sometimes it work and sometimes it doesn't? same method 

[Tony Chatfield1]

Have you checked the state of your token in Oauth credentials table?
Do you have any custom code that could be invalidating the token?

[alexshani]

I don't have a code that revokes the token and I don't have access to our customers credentials table so unfortunately it's not an option for me. I can't understand how suddenly a refresh token isn't working anymore