adutra commented on issue #12363:
URL: https://github.com/apache/iceberg/issues/12363#issuecomment-2676279426

   Hi @c-thiel and @nqvuong1998!
   
   Yes, the fact that token refreshes are broken when using an external IDP 
like Keycloak is a known issue. To summarize (and your analyzis was spot on!), 
there are two issues: 
   
   1. using token exchange to refresh tokens with `client_credentials` is 
non-standard;
   2. a malformed token exchange request results in 401.
   
   I posted some explanations here: 
https://github.com/apache/iceberg/issues/12196#issuecomment-2674990474.
   
   > do you know if the new Auth Manager would solve this?
   
   The AuthManager API can definitely help this issue, although it won't solve 
it per se. Let's push to have it merged:
   
   https://github.com/apache/iceberg/pull/12197


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