[Samba] check_account: Failed to convert SID messages in a log

Christian Naumer cn at brain-biotech.de
Thu Jan 13 12:35:22 UTC 2022

Hi you all,
since now we have upgrade all our server to 4.15.x we are also getting 
flooded with these messages.
Are there any plans to use a higher loglevel for these? Or is there a 



Am 15.12.21 um 13:21 schrieb L.P.H. van Belle via samba:
> Hai,
> Few days ago i upgraded my main file server to 4.15.3 and got flooded
> with these messages,  Failed to convert SID on computer accounts,
> which made my monitoring server getting overloaded.
> Now, everythink still works, i tested thats but i see so much messsages
> I had to revert the update, so for now this server is back to 4.14.10.
> And yes, i have nss_winbind running due NFS i use.
> I've looked at
> https://bugzilla.samba.org/show_bug.cgi?id=14901 and
> https://bugzilla.samba.org/show_bug.cgi?id=14922
> Tried the perl script, that didnt work.
> Its more cosmetic this one, but the amount of log messages i get is
> just to much. (over 100k messages in hours) this also causes high CPU load
> on the server.
> So im wondering what's the best action here.
>> The security update changed the name resolution order,
>> and if you were not running nss_winbindd previously or did not have a
>> valid ID mapping for these computer accounts (needed for
>> nss_winbind to provide an entry for the computer)
>> then the errors would have changed from a 'no such user' to this.
> I see this only in 4.15.3 and not in 4.14.10, is this correct?
> Looked as some workarounds but i can't see whats best action currently.
> and sorry, my head is not working with me, stuff happend here..
> So far,
> Greetz,
> Louis

Dr. Christian Naumer
Vice President
Unit Head Bioprocess Development

BRAIN Biotech AG
Darmstaedter Str. 34-36, D-64673 Zwingenberg
e-mail cn at brain-biotech.com, homepage www.brain-biotech.com
phone +49-6251-9331-30 / fax +49-6251-9331-11

Sitz der Gesellschaft: Zwingenberg/Bergstrasse
Registergericht AG Darmstadt, HRB 24758
Vorstand: Adriaan Moelker (Vorstandsvorsitzender), 
Lukas Linnig
Aufsichtsratsvorsitzender: Dr. Georg Kellinghusen

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