[Users] Gluster command [Non interactive user] failed on server ..

Hi, I'm seeing this weird error on my host which runs the hosted-engine, it only recently showed up and put the host into 'Non Operational' : Gluster command [Non interactive user] failed on server HV01. ovirt-engine.log http://www.fpaste.org/69949/90213863/ Current running VMs continue to run. Has anyone seen this before? Thanks, Andrew