[ovirt-users] Snapshot chain inconsistency

Hi, I encountered an issue in removing a snapshot. Trying to remove a snapshot of a VM with two disks I got an error in engine.log (and removal fails): 2024-03-05 15:23:10,568+01 ERROR [org.ovirt.engine.core.bll.MergeStatusCommand] (EE-ManagedExecutorService-commandCoordinator-Thread-1) [a597e182-955b-40ce-8e16-7d9fc7e62b21] Failed to live merge. Top volume aa09f887-a739-4962-a682-b68a24a1c137 is still in qemu chain [21d35f2a-0776-4d4e-bb68-a09929564086, ad4b21d6-1cf9-445c-80a7-3bc3c4abcfa0, fd17e47d-215e-422e-8c3d-4094da891d52, aa09f887-a739-4962-a682-b68a24a1c137] As I said VM has two disks, one of them is behaving correctly, the other one has some issue. If I try (on the hypervisor): vdsm-tool dump-volume-chains <SD-UUID> I get: image: 26ce6c05-9da2-48f7-80be-ece76f6f028f - ad4b21d6-1cf9-445c-80a7-3bc3c4abcfa0 status: OK, voltype: INTERNAL, format: COW, legality: LEGAL, type: SPARSE, capacity: 53687091200, truesize: 43486543872 - 21d35f2a-0776-4d4e-bb68-a09929564086 status: OK, voltype: INTERNAL, format: COW, legality: LEGAL, type: SPARSE, capacity: 53687091200, truesize: 35030827008 - aa09f887-a739-4962-a682-b68a24a1c137 status: OK, voltype: INTERNAL, format: COW, legality: LEGAL, type: SPARSE, capacity: 53687091200, truesize: 8455716864 - fd17e47d-215e-422e-8c3d-4094da891d52 status: OK, voltype: LEAF, format: COW, legality: LEGAL, type: SPARSE, capacity: 53687091200, truesize: 9932111872 image: 42acd796-4297-4a91-b119-e7c5e91e3c2c - 370cc02d-3585-4fea-bd57-a4c88174fc71 status: OK, voltype: INTERNAL, format: COW, legality: LEGAL, type: SPARSE, capacity: 214748364800, truesize: 17716740096 - cf6315b9-4e96-4323-95b4-d50abd0443bd status: OK, voltype: LEAF, format: COW, legality: LEGAL, type: SPARSE, capacity: 214748364800, truesize: 2818572288 first listed image is the disk failing snapshot removal, the other one is the image with no problem. Virtual machine is (luckily) up and running. Any hint to fix? Engine DB tweak? TIA, gc -- Giulio Casella giulio at di.unimi.it System and network architect Computer Science Dept. - University of Milano