kimsehwan96 commented on code in PR #827:
URL: https://github.com/apache/ranger/pull/827#discussion_r3892945503


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ugsync/src/main/java/org/apache/ranger/ldapusersync/process/LdapUserGroupBuilder.java:
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Review Comment:
   @spolavarpau1 
   Thanks for the review. That reset works only on servers that actually have 
those attributes (AD/OpenLDAP).
   
   Google Secure LDAP (schema) provides neither uSNChanged nor modifyTimestamp, 
and a filter on an attribute the server doesn't have matches nothing, 
regardless of the value. 
   
   So with delta sync disabled the search returns 0 entries and no users get 
synced at all. 
   
   The issue is the presence of the clause, not its value. Verified against 
Google Secure LDAP: with the clause, 0 entries; without it, all entries. On 
AD/OpenLDAP the result set is unchanged, so no behavior change.



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