Satellite pre-upgrade check to 6.3 fails on "Check whether all services are running using the ping call" step

Solution Verified - Updated -

Issue

  • running upgrade check to Satellite 6.3
  • it everytimes fails on step Check whether all services are running using the ping callwith error Couldn't connect to the server: undefined methodto_sym' for nil:NilClass`
  • when calling hammer pingdirectly, it returns success

Environment

  • Red Hat Satellite 6.2 (being prepared to upgrade to 6.3)
    • rubygem-foreman_maintain-0.4.9-1.el7sat.noarch installed

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