2015-05-28 14:54:33,841 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler_Worker-13) [7a991cf9] Correlation ID: 7a991cf9, Job ID: 9d72a247-101f-4a3a-bd95-c02ac9b76aa1, Call Stack: null, Custom Event ID: -1, Message: Host green-vdsa is installed with VDSM version (<UNKNOWN>) and cannot join cluster Default which is compatible with VDSM versions [4.13, 4.17, 4.14, 4.9, 4.16, 4.11, 4.15, 4.12, 4.10].
2015-05-28 14:54:33,862 INFO  [org.ovirt.engine.core.vdsbroker.HostMonitoring] (DefaultQuartzScheduler_Worker-13) [7a991cf9] Host 'green-vdsa'(01386332-6089-46cc-be18-3bc27dd9961a) is already in NonOperational status for reason 'VERSION_INCOMPATIBLE_WITH_CLUSTER'. SetNonOperationalVds command is skipped.