Why is "warning: Cannot invert serialized constraint set" appearing in the Pacemaker cluster log?

Solution Verified - Updated -

Issue

  • Why is "warning: Cannot invert serialized constraint set" appearing in the Pacemaker cluster log?
# pcs constraint order --full
  Resource Sets:
    set dummy1 dummy2 (id:pcs_rsc_set_dummy1_dummy2) setoptions kind=Serialize (id:pcs_rsc_order_set_dummy1_dummy2)

From /var/log/messages:
Feb  4 10:13:38 node-1 stonith-ng[3471]: warning: Cannot invert serialized constraint set pcs_rsc_set_dummy1_dummy2

Environment

  • Red Hat Enterprise Linux 6 or 7 (with the High Availability Add-On)
  • Pacemaker

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