Seeing this as of late when activating hosts. The odd this is that it reports a failure to activate the host (EL6.4) but still does it anyways.
Engine side:
2013-05-13 12:53:38,547 INFO [org.ovirt.engine.core.bll.HandleVdsVersionCommand] (pool-5-thread-42) [21543ac] Running command: HandleVdsVersionCommand internal: true. Entities affected : ID: 15f11023-9746-49de-b33f-e3cc7dca6f65 Type: VDS
2013-05-13 12:53:38,549 INFO [org.ovirt.engine.core.vdsbroker.ActivateVdsVDSCommand] (pool-5-thread-42) [21543ac] FINISH, ActivateVdsVDSCommand, return: Host[durotar], log id: 3796a7bd
2013-05-13 12:53:38,625 WARN [org.ovirt.engine.core.bll.network.host.SetupNetworksCommand] (pool-5-thread-42) [21543ac] CanDoAction of action SetupNetworks failed. Reasons:VAR__ACTION__SETUP,VAR__TYPE__NETWORKS,NETWORKS_ALREADY_ATTACHED_TO_IFACES,$NETWORKS_ALREADY_ATTACHED_TO_IFACES_LIST ovirtmgmt
2013-05-13 12:53:39,368 INFO [org.ovirt.engine.core.bll.ActivateVdsCommand] (pool-5-thread-42) [21543ac] Activate finished. Lock released. Monitoring can run now for host durotar from data-center Azeroth
VDSM Side:
Thread-13::DEBUG::2013-05-13 12:53:37,841::BindingXMLRPC::933::vds::(wrapper) return getCapabilities with {'status': {'message': 'Done', 'code': 0}, 'info': {'HBAInventory': {'iSCSI': [{'InitiatorName': 'iqn.2012-09.net.azeroth:durotar'}], 'FC': []}, 'packages2': {'kernel': {'release': '358.6.1.el6.x86_64', 'buildtime': 1366751713.0, 'version': '2.6.32'}, 'glusterfs-rdma': {'release': '0.3.alpha3.el6', 'buildtime': 1367604893L, 'version': '3.4.0'}, 'glusterfs-fuse': {'release': '0.3.alpha3.el6', 'buildtime': 1367604893L, 'version': '3.4.0'}, 'spice-server': {'release': '12.el6', 'buildtime': 1361573005L, 'version': '0.12.0'}, 'vdsm': {'release': '17.el6', 'buildtime': 1368196305L, 'version': '4.10.3'}, 'qemu-kvm': {'release': '2.355.el6_4.2', 'buildtime': 1362691270L, 'version': '0.12.1.2'}, 'qemu-img': {'release': '2.355.el6_4.2', 'buildtime': 1362691270L, 'version': '0.12.1.2'}, 'libvirt': {'release': '18.el6_4.4', 'buildtime': 1366301801L, 'version': '0.10.2'}, 'glusterfs': {'release': '0.3.alpha3.el6', 'buildtime': 1367604893L, 'version': '3.4.0'}, 'mom': {'release': '1.el6', 'buildtime': 1349470062L, 'version': '0.3.0'}, 'glusterfs-server': {'release': '0.3.alpha3.el6', 'buildtime': 1367604893L, 'version': '3.4.0'}}, 'cpuModel': 'Intel(R) Xeon(R) CPU X5570 @ 2.93GHz', 'hooks': {'before_vm_start': {'50_sriov': {'md5': '3ebc60cd2e4eb089820102285fad7c45'}, '50_pincpu': {'md5': '0b5fb99ff0e7acb9ad534b87c02c59e3'}, '50_qos': {'md5': '18b596a6b4e4bad80357f240ba122a5e'}, '50_vmfex': {'md5': '9f5abb892ddb6b3daa779985d38d9f55'}, '50_scratchpad': {'md5': '7db25a4b8cb04f6e7132cb7c2300c111'}, '50_numa': {'md5': '5008c2826714ac5b63748780aabd2f25'}, '50_floppy': {'md5': '202fe18705a7d4c50c40c126e8f8dbe8'}, '50_qemucmdline': {'md5': 'a884929ad6f5eb039887157288867409'}, '50_macspoof': {'md5': '25deea559772719