Applies to OnCommand Unified Manager (all versions from 6.x to 9.5, all operating systems) (UM) ActiveIQ Unified Manager (all versions, all operating systems) (UM) Issue Host discovery failed. Can be ...Applies to OnCommand Unified Manager (all versions from 6.x to 9.5, all operating systems) (UM) ActiveIQ Unified Manager (all versions, all operating systems) (UM) Issue Host discovery failed. Can be observed in multiple cases, similar, but not limited to bellow: Cannot add cluster in UM. Cannot communicate with the storage controller host.