[keycloak-dev] Client and Service Account Session

Hi, Currently, every time a confidential client tries to get a new access token from the token endpoint a new session is created on the server. This can lead to multiple active sessions for a single client/service account when doing multiple requests to token endpoint. To avoid that the client should store the access token/refresh token and use a refresh token when appropriate in case the access token has expired. That is fine. Now, suppose a confidential client is deployed and wants an access token. A new session will be created on the server. In case the application goes down for some reason (e.g.: container moved to a different node in kubernetes and without a persistent volume) and tries to get a new access token, we may end-up with two active sessions when asking for a new token after a re-deploy. What are your thoughts about re-using existing sessions when doing client credentials ? What could be the impact on clustering if we need (and we'll probably need) to update the session ? Another question would be ... Does make sense to also enable clients to obtain tokens without necessarily creating a session on the server ? I think that in most cases, you don't really want to keep track of sessions when doing client credentials. Regards. Pedro Igor