danielcweeks commented on code in PR #12582:
URL: https://github.com/apache/iceberg/pull/12582#discussion_r2012382856


##########
aws/src/main/java/org/apache/iceberg/aws/RESTSigV4AuthManager.java:
##########
@@ -61,20 +61,29 @@ public RESTSigV4AuthSession catalogSession(
   }
 
   @Override
-  public AuthSession contextualSession(SessionCatalog.SessionContext context, 
AuthSession parent) {
+  public RESTSigV4AuthSession contextualSession(
+      SessionCatalog.SessionContext context, AuthSession parent) {
     AwsProperties contextProperties =
-        new AwsProperties(RESTUtil.merge(catalogProperties, 
context.properties()));
+        new AwsProperties(
+            RESTUtil.merge(
+                catalogProperties,

Review Comment:
   I don't think we've had a scenario where SigV4 has used different 
credentials for different endpoints.  So far, we've seen a few implementations 
if API Gateways that just authenticate requests signed by clients.  That 
doesn't mean the case won't come up int the future, but I wouldn't want to try 
to solve for it proactively.
   
   That said, I was hoping there would be enough context in the parent session 
that we wouldn't need to go back to catalog properties, but not everything is 
carried through the auth session.  The only problem would be if there is every 
cross-catalog auth sharing, which I think is unlikely.
   
   I'm ok with this.



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