[slurm-users] error: user <UID> not found

Marcus Wagner wagner at itc.rwth-aachen.de
Wed Sep 30 10:33:07 UTC 2020

Hi Diego,

the submission process runs on the slurmctld, so the user must be known there.


Am 30.09.2020 um 08:37 schrieb Diego Zuccato:
> Il 30/09/20 03:49, Brian Andrus ha scritto:
> Tks for the answer.
>> That means the system has no idea who that user is.
> But which system? Being a message generated by slurmctld, I thought it
> must be the frontend node. But, as I wrote, that system correctly
> identifies the user (he's logged in, 'id' and 'getent passwd' can
> resolve both the name and the UID).
>> If you are part of a domain or other shared directory (ldap, etc), your
>> master is likely not configured right.
> The frontend is an AD member, using PBIS-open. It's been working as-is
> for at least the last 6 years :) and other users from the same domain
> are able to submit jobs.
>> If you are using SSSD, it is also possible your sssd has too long of a
>> cache time. Run "sss_cache -E" to clear everything.
> To partially workaround an issue with conflicting UIDs/GIDs (the
> PBIS-assigned range is too short for our forest), I already clear the
> PBIS cache every 5 minutes and re-populate it forcing an id of every
> entry of /home/{PERSONALE,STUDENTI}/*.* entry (this forces PBIS to pull
> the right name from AD when first resolving the UID, so the GUID is
> already cached and associated to the UID when the reverse mapping is
> required).
>> If you have a forest, it could be the information has not propagated to
>> all the servers, so you have to wait.
>> I've been places where that can take 24 hours.
> It's been more than a week since the first failure :( And our forest
> usually propagates changes in just a few minutes (more often in seconds).

Dipl.-Inf. Marcus Wagner

IT Center
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wagner at itc.rwth-aachen.de

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