[ovirt-users] ETL service sampling has encountered an error

Dear all, Since upgrading to 4.0.6, we see this error in the engine events tab and were wondering how to fix it. ovirt-engine-dwh.log — 2017-02-20 22:01:00|zPHx4s|6nXgTp|ygadfe|OVIRT_ENGINE_DWH|SampleTimeKeepingJob|Default|5|tWarn|tWarn_1|Can not sample data, oVirt Engine is not updating the statistics. Please check your oVirt Engine status.|9704 — And in engine log the only error I see (repeated) since yesterday is 65366:2017-02-21 22:13:34,357 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.VdsBrokerObjectsBuilder] (DefaultQuartzScheduler10) [2dc75859] null architecture type, replacing with x86_64, %s Any advice on where to start is welcome. Kind regards, Christophe