Hi,
so i was running a 3.4 hosted engine two node setup on centos 6, had some disk issues so i tried to upgrade to centos 7 and follow the path 3.4 > 3.5 > 3.6 > 4.0.  i screwed up dig time somewhere between 3.6 and 4.0, so i wiped the drives, installed a fresh 4.0.3, then created the database and restored the 3.6 engine backup before running engine-setup as per the docs.   things seemed to work, but i have the the following issues / symptoms:
- ovirt-ha-agent running 100% CPU on both nodes
- messages in the UI that the Hosted Engine storage Domain isn't active and Failed to import the Hosted Engine Storage Domain
- hosted engine is not visible in the UI
and the following repeating in the agent.log:

MainThread::INFO::2016-10-03 12:38:27,718::hosted_engine::461::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(start_monitoring) Current state EngineUp (score: 3400)
MainThread::INFO::2016-10-03 12:38:27,720::hosted_engine::466::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(start_monitoring) Best remote host vmhost1.oracool.net (id: 1, score: 3400)
MainThread::INFO::2016-10-03 12:38:37,979::states::421::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(consume) Engine vm running on localhost
MainThread::INFO::2016-10-03 12:38:37,985::hosted_engine::612::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_vdsm) Initializing VDSM
MainThread::INFO::2016-10-03 12:38:45,645::hosted_engine::639::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Connecting the storage
MainThread::INFO::2016-10-03 12:38:45,647::storage_server::219::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Connecting storage server
MainThread::INFO::2016-10-03 12:39:00,543::storage_server::226::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Connecting storage server
MainThread::INFO::2016-10-03 12:39:00,562::storage_server::233::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Refreshing the storage domain
MainThread::INFO::2016-10-03 12:39:01,235::hosted_engine::666::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Preparing images
MainThread::INFO::2016-10-03 12:39:01,236::image::126::ovirt_hosted_engine_ha.lib.image.Image::(prepare_images) Preparing images
MainThread::INFO::2016-10-03 12:39:09,295::hosted_engine::669::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Reloading vm.conf from the shared storage domain
MainThread::INFO::2016-10-03 12:39:09,296::config::206::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine.config::(refresh_local_conf_file) Trying to get a fresher copy of vm configuration from the OVF_STORE
MainThread::WARNING::2016-10-03 12:39:16,928::ovf_store::107::ovirt_hosted_engine_ha.lib.ovf.ovf_store.OVFStore::(scan) Unable to find OVF_STORE

MainThread::ERROR::2016-10-03 12:39:16,934::config::235::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine.config::(refresh_local_conf_file) Unable to get vm.conf from OVF_STORE, falling back to initial vm.conf

I have searched a bit and not really found a solution, and have come to the conclusion that i have made a mess of things, and am wondering if the best solution is to export the VMs, and reinstall everything then import them back?
i am using remote  NFS storage.
if i try and add the hosted engine storage domain it says it is already registered.

i have also upgraded and am now running oVirt Engine Version: 4.0.4.4-1.el7.centos
hosts were installed using ovirt-node.  currently at  3.10.0-327.28.3.el7.x86_64
if a fresh install is best, any advice / pointer to doc that explains best way to do this?
i have not moved my most important server over to this cluster yet so i can take some downtime to reinstall.
thanks!
sam

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