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Description of problem:

In a cluster, with locking_type set to 3, start clvmd on all nodes, shutdown clvmd on one node:

pvs will fail to scan devices because it cannot obtain cluster locking.

vgs/lvs will instead report the error (correctly) and then provide the information.

Behavior should be consistent across all tools.

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Seems this no longer an issue:

[root@rhel7-b ~]# pvs
  PV         VG   Fmt  Attr PSize   PFree  
  /dev/sda   vg   lvm2 a--  124.00m 120.00m
  /dev/vda2  rhel lvm2 a--    9.51g      0 


[root@rhel7-c ~]# pvs
  connect() failed on local socket: No such file or directory
  Internal cluster locking initialisation failed.
  WARNING: Falling back to local file-based locking.
  Volume Groups with the clustered attribute will be inaccessible.
  Skipping clustered volume group vg
  Skipping volume group vg
  PV         VG   Fmt  Attr PSize PFree
  /dev/vda2  rhel lvm2 a--  9.51g    0