problem

If you upgrade the Ubuntu KVM cloustack-agent to 4.21.0.0 it longer power of or redeployes.

2025-09-01 15:42:44,488 INFO [kvm.resource.LibvirtConnection] (AgentRequest-Handler-4:[]) (logid:b0554662) No existing libvirtd connection found. Opening a new one 2025-09-01 15:42:44,490 WARN [kvm.resource.LibvirtConnection] (AgentRequest-Handler-4:[]) (logid:b0554662) Can not find a connection for Instance s-14814-VM. Assuming the default connection. 2025-09-01 15:42:44,607 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-4:[]) (logid:b0554662) Groovy script '/etc/cloudstack/agent/hooks/libvirt-vm-state-change.groovy' is not available. Transformations will not be applied. 2025-09-01 15:42:44,607 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-4:[]) (logid:b0554662) Shell script '/etc/cloudstack/agent/hooks/libvirt-vm-state-change.sh' is not available. Transformations will not be applied. 2025-09-01 15:42:44,607 WARN [kvm.resource.LibvirtKvmAgentHook] (AgentRequest-Handler-4:[]) (logid:b0554662) Groovy scripting engine is not initialized. Data transformation skipped. 2025-09-01 15:43:11,433 WARN [kvm.resource.LibvirtComputingResource] (AgentRequest-Handler-2:[]) (logid:b0554662) Setting System VM's [VM {id: "14814", name: "s-14814-VM", uuid: "6f242aaa-bb01-408b-9991-5818c70ab7f7", type: "SecondaryStorageVm"}] current memory as max memory [524288]. 2025-09-01 15:43:11,435 INFO [kvm.storage.LibvirtStorageAdaptor] (AgentRequest-Handler-2:[]) (logid:b0554662) Trying to fetch storage pool 11838e6d-4476-32dd-9c19-f884dedd79b4 from libvirt 2025-09-01 15:43:11,473 INFO [kvm.storage.LibvirtStorageAdaptor] (AgentRequest-Handler-2:[]) (logid:b0554662) Trying to fetch storage pool 11838e6d-4476-32dd-9c19-f884dedd79b4 from libvirt 2025-09-01 15:43:11,528 INFO [kvm.storage.LibvirtStorageAdaptor] (AgentRequest-Handler-2:[]) (logid:b0554662) Trying to fetch storage pool 11838e6d-4476-32dd-9c19-f884dedd79b4 from libvirt 2025-09-01 15:43:11,538 WARN [cloud.agent.Agent] (AgentRequest-Handler-2:[]) (logid:b0554662) Caught: java.lang.NullPointerException: Cannot invoke "java.net.URI.getScheme()" because "uri" is null at com.cloud.network.Networks$BroadcastDomainType.getSchemeValue(Networks.java:180) at com.cloud.network.Networks$BroadcastDomainType.getValue(Networks.java:234) at com.cloud.hypervisor.kvm.resource.BridgeVifDriver.plug(BridgeVifDriver.java:258) at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVif(LibvirtComputingResource.java:3816) at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVifs(LibvirtComputingResource.java:3395) at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:86) at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:52) at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78) at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:2240) at com.cloud.agent.Agent.processRequest(Agent.java:813) at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1295) at com.cloud.utils.nio.Task.call(Task.java:83) at com.cloud.utils.nio.Task.call(Task.java:29) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:840)

versions

Cloudstack Management on 4.21.0.0
Ubuntu 24.04 on both Management and Host
Advanced networking selected without security groups
Secondary storage using NFS

The steps to reproduce the bug

1. Upgrade cloudstack-agent to 4.21.0.0 stop secondarystoragevm then start again
2. Also breaks on redeploy
   To fix the issue roll cloudstack-agent back to 4.20.0.1

What to do about it?

No response