OLVM: Unable to Power ON the VMs or Provision New VMs in OLVM Using OVN with : EngineException: (Failed with error Connection refused (Connection refused) and code 5050) (Doc ID 3039881.1)

Last updated on AUGUST 07, 2024

Applies to:

Symptoms

Unable to boot a virtual machine that uses a NIC from OVN.

The /var/log/ovirt-engine/engine.log file contains errors like:

2024-07-30 13:59:20,302+04 INFO  [org.ovirt.engine.core.bll.RunVmCommand] (default task-609) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] Lock Acquired to object 'EngineLock:{exclusiveLocks='[2f2f5df7-7535-46a3-9e59-zzzzzzzzzzzz=VM]', sharedLocks=''}'
2024-07-30 13:59:20,327+04 INFO  [org.ovirt.engine.core.vdsbroker.IsVmDuringInitiatingVDSCommand] (default task-609) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] START, IsVmDuringInitiatingVDSCommand( IsVmDuringInitiatingVDSCommandParameters:{vmId='2f2f5df7-7535-46a3-9e59-zzzzzzzzzzzz'}), log id: 4e1436d8
2024-07-30 13:59:20,327+04 INFO  [org.ovirt.engine.core.vdsbroker.IsVmDuringInitiatingVDSCommand] (default task-609) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] FINISH, IsVmDuringInitiatingVDSCommand, return: false, log id: 4e1436d8
2024-07-30 13:59:20,388+04 INFO  [org.ovirt.engine.core.bll.RunVmCommand] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] Running command: RunVmCommand internal: false. Entities affected :  ID: 2f2f5df7-7535-46a3-9e59-zzzzzzzzzzzz Type: VMAction group RUN_VM with role type USER
2024-07-30 13:59:20,472+04 INFO  [org.ovirt.engine.core.vdsbroker.UpdateVmDynamicDataVDSCommand] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] START, UpdateVmDynamicDataVDSCommand( UpdateVmDynamicDataVDSCommandParameters:{hostId='null', vmId='2f2f5df7-7535-46a3-9e59-zzzzzzzzzzzz', vmDynamic='org.ovirt.engine.core.common.businessentities.VmDynamic@40e3ac8a'}), log id: 6910554f
2024-07-30 13:59:20,476+04 INFO  [org.ovirt.engine.core.vdsbroker.UpdateVmDynamicDataVDSCommand] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] FINISH, UpdateVmDynamicDataVDSCommand, return: , log id: 6910554f
2024-07-30 13:59:20,493+04 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] EVENT_ID: USER_FAILED_RUN_VM(54), Failed to run VM <VMNAME>  (User: user@internal-authz).
2024-07-30 13:59:20,495+04 INFO  [org.ovirt.engine.core.bll.RunVmCommand] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] Lock freed to object 'EngineLock:{exclusiveLocks='[2f2f5df7-7535-46a3-9e59-yyyyyyyyyyyy=VM]', sharedLocks=''}'
2024-07-30 13:59:20,495+04 ERROR [org.ovirt.engine.core.bll.RunVmCommand] (EE-ManagedThreadFactory-engine-Thread-130) [1eda3b0a-60f0-4aac-922a-xxxxxxxxxxxx] Command 'org.ovirt.engine.core.bll.RunVmCommand' failed: EngineException: (Failed with error Connection refused (Connection refused) and code 5050)

Removing the network interface from the VM, allows to power on the VM.
The NIC can not be added after the VM has started, it fails with similar errors.

Changes

Cause

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