> On 17 Oct 2025, at 00:23, vectinx via 389-users 
> <[email protected]> wrote:
> 
> Apparently, the function `memberof_del_dn_from_groups()` updates the `member` 
> attribute:
> 
> /* Deletes a member DN from all groups that refer to it. */
> static int
> memberof_del_dn_from_groups(Slapi_PBlock *pb, MemberOfConfig *config, 
> Slapi_DN *sdn)
> 
> It uses the `memberofgroupattr` configuration parameter from the MemberOf 
> plugin:
> 
> memberofgroupattr: member
> memberofgroupattr: memberUser
> memberofgroupattr: memberHost
> memberofgroupattr: ipaOwner
> 
> This function is called when deleting entries, including during deferred 
> updates:
> https://github.com/389ds/389-ds-base/blob/main/ldap/servers/plugins/memberof/memberof.c#L644
> 
> ---
> 
> Regarding the updates with CSNs `68edda59000000030000` and 
> `68edda59000100030000`:
> At first, I also suspected that they were caused by the referential integrity 
> update replication.
> However, after excluding the `member` attribute from referential integrity,
> the duplicate modify operations still appear on both replicas.
> 
> Here’s what I did to exclude `member` from the Referential Integrity plugin:
> 
> ldapmodify -D "cn=Directory Manager" -W <<EOF
> dn: cn=referential integrity postoperation,cn=plugins,cn=config
> changetype: modify
> delete: referint-membership-attr
> referint-membership-attr: member
> EOF
> 
> Then I deleted the test user, and the result was:
> 
> dbid: 68f0fb0d000000040000
>  operation: delete
>  dn: uid=integrity-fix,cn=users,cn=accounts,dc=test,dc=loc
> 
> dbid: 68f0fb0d000100040000
>  operation: delete
>  dn: cn=integrity-fix,cn=groups,cn=accounts,dc=test,dc=loc
> 
> dbid: 68f0fb0d000300040000
>  operation: modify
>  dn: cn=ipausers,cn=groups,cn=accounts,dc=test,dc=loc
>  member: uid=integrity-fix,cn=users,cn=accounts,dc=test,dc=loc
>  modifiersName: cn=MemberOf Plugin,cn=plugins,cn=config
> 
> dbid: 68f0fb0e000000030000
>  operation: modify
>  dn: cn=ipausers,cn=groups,cn=accounts,dc=test,dc=loc
>  member: uid=integrity-fix,cn=users,cn=accounts,dc=test,dc=loc
>  modifiersName: cn=MemberOf Plugin,cn=plugins,cn=config
> 
> As you can see, the duplicate `modify` operations on the group are triggered 
> by the MemberOf plugin itself,
> even when the Referential Integrity plugin is excluded from handling the 
> `member` attribute.
> 

Seems like an issue where memberOf is trying to duplicate the behaviour of 
refint. refint should be responsible for cleaning up member attributes that are 
no longer needed - not memberOf.

I'm not sure why this duplicate behaviour was added - tbordaz, what was the 
reason behind memberof cleaning up member attributes, not just memberOf? 


-- 
Sincerely,

William Brown

Senior Software Engineer,
Identity and Access Management
SUSE Labs, Australia

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