The old cooler (soon to be replaced) has failed.
Therefore the fimm cluster had to shut down to avoid overheating.

Update, 14:45: We now have the fimm frontend with filesystems operational for the moment. The queue will accept jobs, but they will not start since the nodes are not up. See note about scheduled downtime due to cooling system upgrade.

Update, Dec. 13th, 09:10: Due to limited cooling the frontend will be unavailable until the scheduled downtime has been completed.

Update, 19th 16:30: The cooling is now started again (see also updates on the schedule downtime note).