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we have not faced such kind of issues in past and we are running more than 10 apache cloud stack instance with same setup. we are facing this issue on this new deployment where vm deployment is failing with below error 2026-08-05 17:38:03,289 WARN [resource.wrapper.LibvirtStartCommandWrapper] (AgentRequest-Handler-4:[]) (logid:) LibvirtException org.libvirt.LibvirtException: unsupported configuration: more than 255 vCPUs require extended interrupt mode enabled on the iommu device 2026-08-05 17:41:21,475 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-2:[]) (logid:) Groovy scripting engine is not initialized. Data transformation skipped. |
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problem
The long description of your apache cloud stack version: 4.20.2.0
OS : redhat 8.10
Hypervisor: KVM
two hosts in a cluster and below is the CPU configuration
CPU: 2 * AMD EPYC 7C13 64-Core Processor
we have created a apache cloud stack on 4.20.2.0 and when we are creating a new vm with unconstrained offering its failing with below error
2026-08-05 17:38:03,289 WARN [resource.wrapper.LibvirtStartCommandWrapper] (AgentRequest-Handler-4:[]) (logid:) LibvirtException org.libvirt.LibvirtException: unsupported configuration: more than 255 vCPUs require extended interrupt mode enabled on the iommu device
2026-08-05 17:41:21,475 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-2:[]) (logid:) Groovy scripting engine is not initialized. Data transformation skipped.
2026-08-05 17:41:21,503 WARN [resource.wrapper.LibvirtStartCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) LibvirtException org.libvirt.LibvirtException: unsupported configuration: Maximum CPUs greater than specified machine type limit 240
at org.libvirt.ErrorHandler.processEr
versions
4.20.2.0
The steps to reproduce the bug
...
What to do about it?
The long description of your apache cloud stack version: 4.20.2.0
OS : redhat 8.10
Hypervisor: KVM
two hosts in a cluster and below is the CPU configuration
CPU: 2 * AMD EPYC 7C13 64-Core Processor
we have created a apache cloud stack on 4.20.2.0 and when we are creating a new vm with unconstrained offering its failing with below error
2026-08-05 17:38:03,289 WARN [resource.wrapper.LibvirtStartCommandWrapper] (AgentRequest-Handler-4:[]) (logid:) LibvirtException org.libvirt.LibvirtException: unsupported configuration: more than 255 vCPUs require extended interrupt mode enabled on the iommu device
2026-08-05 17:41:21,475 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-2:[]) (logid:) Groovy scripting engine is not initialized. Data transformation skipped.
2026-08-05 17:41:21,503 WARN [resource.wrapper.LibvirtStartCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) LibvirtException org.libvirt.LibvirtException: unsupported configuration: Maximum CPUs greater than specified machine type limit 240
at org.libvirt.ErrorHandler.processEr
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