Hi Tony, I’ve seen this issue when you are running overpopulated compute nodes are run out of memory. Are you oversubscribing memory by any chance? Thanks, Mohammed From: Karera Tony <tonykarera@gmail.com> Date: Tuesday, January 23, 2024 at 8:57 AM To: openstack-discuss <openstack-discuss@lists.openstack.org> Subject: Instances Shutting down themselves You don't often get email from tonykarera@gmail.com. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> Hello Team, For some reason today morning VMs on one of my compute Nodes started shutting down themselves. When I checked in Horizon, I realized that that particular Compute was disabled and I enabled it. I restarted the Instances and all is well now. I have attached the Logs for nova-compute in case someone would like to help. Regards Tony Karera