[Satellite6] Random REX jobs scheduled to the same time are raising "Could not use any Capsule" error

Solution Verified - Updated -

Issue

  • running a bulk of REX jobs scheduled to the same time
  • some of them are failing with "Could not use any Capsule" error
  • nothing in common to the failed hosts
  • re-running any REX to the failed hosts succeeds

Environment

Red Hat Satellite 6.2 (any version) and 6.3

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