samba - Jan 2023 - Failed to convert SID to a UID for a computer

We have a couple of hosts running Samba 4.16.5 as AD DC. Besides, we
have other hosts with Samba 4.15.5 as file servers. From time to time
the file shares that are mounted with cifs from some Linux clients get
stuck.

All I can see in Samba logs on the file servers, are message like:

check_account: Failed to convert SID
S-X-X-XX-XXXXXXXXX-XXXXXXXXXX-XXXXXXXXXX-XXXX to a UID
(dom_user[SMB\host-xxx$]), being host-xxx one of the Windows computer
client.

Is this message normal?. Or should I set an UID manually for Windows
computers as I do for users and groups (as idmap backend is ad)?.

What about the problem?. Could it be related to the message?.

Thanks very much,

tizo

On 23/01/2023 15:21, tizo via samba wrote:
> We have a couple of hosts running Samba 4.16.5 as AD DC. Besides, we
> have other hosts with Samba 4.15.5 as file servers. From time to time
> the file shares that are mounted with cifs from some Linux clients get
> stuck.
> 
> All I can see in Samba logs on the file servers, are message like:
> 
> check_account: Failed to convert SID
> S-X-X-XX-XXXXXXXXX-XXXXXXXXXX-XXXXXXXXXX-XXXX to a UID
> (dom_user[SMB\host-xxx$]), being host-xxx one of the Windows computer
> client.
> 
> Is this message normal?. Or should I set an UID manually for Windows
> computers as I do for users and groups (as idmap backend is ad)?.
That is perfectly normal, on Windows a computer is a user with an extra 
objectclass. On Linux, a computer is just a computer. You can either 
ignore those messages or you can do as you suggest, give each computer a 
uidNumber attribute.
> 
> What about the problem?.
No idea, not enough info provided.
> Could it be related to the message?.
I doubt it.

Rowland