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https://issues.apache.org/jira/browse/KNOX-3328?focusedWorklogId=1021429&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1021429
 ]

ASF GitHub Bot logged work on KNOX-3328:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 21/May/26 08:52
            Start Date: 21/May/26 08:52
    Worklog Time Spent: 10m 
      Work Description: smolnar82 commented on code in PR #1236:
URL: https://github.com/apache/knox/pull/1236#discussion_r3279869950


##########
gateway-server/src/main/java/org/apache/knox/gateway/services/ldap/backend/LdapProxyBackend.java:
##########
@@ -269,6 +274,18 @@ public Entry getUser(String username, SchemaManager 
schemaManager) throws Except
                 return entry;
             }
             cursor.close();
+
+            // 2. Try search in group base if not found in user base
+            String groupFilter = "(cn=" + username + ")";
+            cursor = connection.search(groupSearchBase, groupFilter, 
SearchScope.SUBTREE, "*", "+");
+            if (cursor.next()) {
+                Entry sourceEntry = cursor.get();
+                Entry entry = createProxyEntry(sourceEntry, username, 
connection, schemaManager);
+                cursor.close();
+                return entry;
+            }
+            cursor.close();
+
             return null;

Review Comment:
   The `return null` is actually not new in this PR:
   <img width="1115" height="584" alt="image" 
src="https://github.com/user-attachments/assets/325ae564-e8ae-4769-ad41-5d0ce6de2590";
 />
   According to the JavaDoc of the parent class, this is perfectly ok:
   <img width="550" height="365" alt="image" 
src="https://github.com/user-attachments/assets/bec69296-ad53-4d06-a79a-06d985b38b4c";
 />
   On the other hand, I agree that it's good to have some DEBUG log.





Issue Time Tracking
-------------------

    Worklog Id:     (was: 1021429)
    Time Spent: 1h 50m  (was: 1h 40m)

> Support recursive group resolution in LDAP Proxy Service
> --------------------------------------------------------
>
>                 Key: KNOX-3328
>                 URL: https://issues.apache.org/jira/browse/KNOX-3328
>             Project: Apache Knox
>          Issue Type: Improvement
>          Components: Server
>    Affects Versions: 3.0.0
>            Reporter: Sandor Molnar
>            Assignee: Sandor Molnar
>            Priority: Major
>             Fix For: 3.0.0
>
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> The current Knox LDAP proxy implementation only supports direct group 
> memberships for users. When a client queries for a user's {{memberOf}} 
> attribute, Knox only returns the groups where the user is an explicit member, 
> ignoring any transitive or nested group memberships.
> Additionally, group entries themselves are not enriched with the {{memberOf}} 
> attribute, making it difficult for clients to walk the hierarchy manually.
> This task implements:
> # Recursive group resolution for both search-based and {{memberOf}}-based 
> lookups.
> # Strict cycle detection to prevent infinite loops in misconfigured LDAP 
> environments.
> # Configurable depth limits to prevent performance degradation.
> # Enrichment of group-type entries with the {{memberOf}} attribute, allowing 
> clients to see parent group memberships.



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