flyrain commented on code in PR #10256:
URL: https://github.com/apache/iceberg/pull/10256#discussion_r1590181761


##########
core/src/main/java/org/apache/iceberg/rest/RESTSessionCatalog.java:
##########
@@ -215,6 +215,12 @@ public void initialize(String name, Map<String, String> 
unresolved) {
     this.paths = ResourcePaths.forCatalogProperties(mergedProps);
 
     String token = mergedProps.get(OAuth2Properties.TOKEN);
+    // re-resolve these variables in case they were overridden by the config 
endpoint
+    credential = mergedProps.get(OAuth2Properties.CREDENTIAL);
+    scope = mergedProps.getOrDefault(OAuth2Properties.SCOPE, 
OAuth2Properties.CATALOG_SCOPE);
+    oauth2ServerUri =
+        mergedProps.getOrDefault(OAuth2Properties.OAUTH2_SERVER_URI, 
ResourcePaths.tokens());

Review Comment:
   It's a good idea to get certain configs from server. Thanks for doing this. 
Should we add these into config endpoint spec if we are doing this? Without 
something in the spec, we are relying on the convention. There is a minor 
concern that the config response from the server side may happen to have the 
same name with different meaning. For example, a property named `scope` in the 
config response may mean different things. cc @danielcweeks 



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