adutra commented on code in PR #14178:
URL: https://github.com/apache/iceberg/pull/14178#discussion_r2399166204


##########
core/src/main/java/org/apache/iceberg/rest/auth/OAuth2Manager.java:
##########
@@ -259,16 +260,41 @@ protected OAuth2Util.AuthSession 
newSessionFromTokenExchange(
 
   protected OAuth2Util.AuthSession newSessionFromTokenResponse(
       AuthConfig config, OAuth2Util.AuthSession parent) {
+    RESTClient client = refreshClient;
     OAuthTokenResponse response =
         OAuth2Util.fetchToken(
-            refreshClient,
+            client,
             Map.of(),
             config.credential(),
             config.scope(),
             config.oauth2ServerUri(),
             config.optionalOAuthParams());
     return OAuth2Util.AuthSession.fromTokenResponse(
-        refreshClient, refreshExecutor(), response, 
System.currentTimeMillis(), parent);
+        client, refreshExecutor(), response, System.currentTimeMillis(), 
parent);
+  }
+
+  private void maybeInitRefreshClient(RESTClient sharedClient, AuthSession 
session) {
+    if (refreshClient == null) {
+      synchronized (this) {
+        if (refreshClient == null) {
+          refreshClient = sharedClient.withAuthSession(session);
+        }
+      }
+    }
+  }
+
+  private AuthSessionCache getOrCreateSessionCache(Map<String, String> 
properties) {
+    AuthSessionCache cache = this.sessionCache;

Review Comment:
   I did some simplification, PTAL again.



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