Some pcs commands fail with "Error: cannot load cluster status, xml does not conform to the schema" after updating the packages on a cluster node

Solution In Progress - Updated -

Issue

  • After upgrading from pacemaker-2.1.0-8 or earlier to pacemaker-2.1.2-4 or later, some `pcs commands fail with a schema error.
  • The commands pcs node unstandby and pcs config fail after a rolling upgrade.
# pcs node unstandby
Error: cannot load cluster status, xml does not conform to the schema

# pcs config
Cluster Name: testcluster
Error: cannot load cluster status, xml does not conform to the schema

Environment

  • Red Hat Enterprise Linux 8 (with the High Availability Add-on)

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