Hi guys, I'm in big troubles. Since last night my ovirt engine is unavailable (won't correctly start). Process ovirt-engine is running, and systemd doesn't complain (systemctl status is ok). Digging in engine.log I can find an error: 2022-07-13 09:57:48,314+02 ERROR [org.ovirt.engine.core.utils.serialization.json.JsonObjectDeserializer] (ServerService Thread Pool -- 45) [] Cannot deserialize { "@class" : "org.ovirt.engine.core.common.action.CreateSnapshotDiskParameters", "commandId" : [ "org.ovirt.engine.core.compat.Guid", { "uuid" : "6ae544f6-b608-4d8d-9f99-eabd5d5db0ad" } ], [...cut...] "domain" : "my.dom.ain"[truncated 5971 chars]; line: 72, column: 89] (through reference chain: org.ovirt.engine.core.common.action.CreateSnapshotDiskParameters["diskImagesMap"]) 2022-07-13 09:57:48,315+02 ERROR [org.ovirt.engine.core.bll.InitBackendServicesOnStartupBean] (ServerService Thread Pool -- 45) [] Failed to initialize backend: org.jboss.weld.exceptions.WeldException: WELD-000049: Unable to invoke public void org.ovirt.engine.core.bll.tasks.CommandContextsCacheImpl.initContextsMap() on org.ovirt.engine.core.bll.tasks.CommandContextsCacheImpl@3f52ccce [...cut...] During the night there was a job that was moving a disk (2.5TB) from a storage domain to another. I think it's related. Any ideas? TIA, gc