Update:

Vendor issue with coolant caused thermal shutdown on Jetstream2 compute nodes. 

These have all been returned to service at this time. If your VM is not reachable, you may need to reboot it via the interface of your choice.

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There was a coolant outage at the IU Data Center in Bloomington. Engineers are investigating this issue now.

Direct cooled nodes went into thermal shutdown. Jetstream2 engineers are working to bring these back online presently.