Why do I see messages like "multipathd: dm-42: devmap not registered, can't remove" ?

Solution Unverified - Updated -

Issue

  • When lvm volumes are deactivated the following message is observed in messages:
multipathd: dm-6: remove map (uevent)  
multipathd: dm-6: devmap not registered, can't remove  
multipathd: dm-6: remove map (uevent)  
multipathd: dm-6: devmap not registered, can't remove

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • Device Mapper (DM) Multipath
  • Logical Volume Manager LVM

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