krishnamuttevi commented on code in PR #1162:
URL: https://github.com/apache/ranger/pull/1162#discussion_r3846291836


##########
ugsync/src/main/java/org/apache/ranger/unixusersync/process/PolicyMgrUserGroupBuilder.java:
##########
@@ -738,6 +740,18 @@ private void computeGroupDelta(Map<String, Map<String, 
String>> sourceGroups) {
                 String              curGroupDN       = 
MapUtils.isEmpty(curGroupAttrs) ? groupName : 
curGroupAttrs.get(UgsyncCommonConstants.FULL_NAME);
                 String              newSyncSource    = 
newGroupAttrs.get(UgsyncCommonConstants.SYNC_SOURCE);
 
+                // Universal DN Validation Check (Executes first for both 
startup & runtime)
+                if (MapUtils.isNotEmpty(curGroupAttrs) && 
!StringUtils.equalsIgnoreCase(groupDN, curGroupDN)) {

Review Comment:
   Yes, Since the inclusion of the isDnValidationEnabled = false, means 
blocking the domain name change and in this though inter sync source change was 
accepted by setting the issyncsourcevalidation enabled = false, the dn would be 
changed from Unix to dn of LDAP/Ad which would be eventually blocked as per the 
property isDnValidationEnabled.
   
   So to prevent code duplication for both incremental and at startup (restart) 
as the check is necessary placed the dn validation block upfront 



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