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The "invalid user id" message suggests that you need to be running
as root (or possibly as the slurm user?) to update the node state.<br>
<br>
Run "slurmd -Dvv" as root on one of the compute nodes and it will
show you what it thinks is the socket/core/thread configuration.<br>
<br>
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<hr> <b>From:</b> Shihanjian Wang <a class="moz-txt-link-rfc2396E" href="mailto:swang52@ucsc.edu"><swang52@ucsc.edu></a> <br>
<b>Sent:</b> Monday, April 15, 2019 5:30PM <br>
<b>To:</b> Slurm-users <a class="moz-txt-link-rfc2396E" href="mailto:slurm-users@lists.schedmd.com"><slurm-users@lists.schedmd.com></a><br>
<b>Cc:</b> <br>
<b>Subject:</b> [slurm-users] Scontrol update: invalid user id <br>
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<div>Hi,</div>
<div>We are doing a senior project involving the creation of a
Pi Cluster. We are using 7 Raspberry Pi B+'s in this cluster.
<br>
<br>
When we use sinfo to look at the status of the nodes, they
appear as drained. We also encountered a problem while trying
to update the state of the nodes. When trying to use scontrol
to update the nodes, the get an error message: scontrol
update: invalid user id. We think another reason that the
nodes are drained is because of low "resources". This has to
do with the low socket*core*thread count, which is the number
of CPUs. We have tried changing this number in the
configuration file but this reason still shows.<br>
<br>
</div>
<div>We are unsure what the problem is regarding this issue.
The authentication method used is munge, and we think that
slurm is indeed using munge as the authentication type.</div>
<div><br>
</div>
<div>If more information is needed, please let us know and we
will provide the required information.<br>
<br>
</div>
<div>Thanks.</div>
</div>
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