Persisting model changes in an event listener, KC 20+

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Cross posting from my findings here: Doesn't persist attributes in KC 20.0.2 · Issue #8 · ThoreKr/keycloak-last-login-event-listener · GitHub

I’m having problems in Keycloak 20+ persisting UserModel changes from an EventListener. Has anyone else experienced the same thing? I made a simple test (below), and wasn’t able to persist changes to the user without creating a new transaction. Are there cases in which some events aren’t processed until after the transaction is committed?

This doesn’t persist the attribute:

  public void onEvent(final Event event) {
    if (EventType.LOGIN.equals(event.getType())) {
      UserModel u = session.users().getUserById(realm, event.getUserId());
      u.setSingleAttribute("foo", "bar");
    }
  }

This works:

  public void onEvent(final Event event) {
    if (EventType.LOGIN.equals(event.getType())) {
      KeycloakModelUtils.runJobInTransaction(session.getKeycloakSessionFactory(), s -> {
        UserModel u = s.users().getUserById(realm, event.getUserId());
        u.setSingleAttribute("foo", "bar");
      });
    }
  }