The pulpcore-api, pulpcore-content and pulpcore-worker services are failing in Red Hat Capsule 6

Issue

• Unable to restart the failed pulpcore-api, pulpcore-content and pulpcore-worker services in Red Hat Capsule 6

  # satellite-maintain service status -b
  Running Status Services
  ...
  Get status of applicable services: 
  
  Displaying the following service(s):
  redis, postgresql, pulpcore-api, pulpcore-content, pulpcore-worker@1.service, pulpcore-worker@2.service, tomcat, dynflow-sidekiq@orchestrator, foreman, httpd, dynflow-sidekiq@worker-1, dynflow-sidekiq@worker-hosts-queue-1, foreman-proxy
  \ displaying redis                                 [OK]                         
  \ displaying postgresql                            [OK]                         
  \ displaying pulpcore-api                          [FAIL]                       
  \ displaying pulpcore-content                      [FAIL]                       
  \ displaying pulpcore-worker@1.service             [FAIL]                       
  \ displaying pulpcore-worker@2.service             [FAIL]                       
  \ displaying tomcat                                [OK]                         
  | displaying dynflow-sidekiq@orchestrator          [OK]                         
  | displaying foreman                               [OK]                         
  | displaying httpd                                 [OK]                         
  | displaying dynflow-sidekiq@worker-1              [OK]                         
  | displaying dynflow-sidekiq@worker-hosts-queue-1  [OK]                         
  | displaying foreman-proxy                         [OK]                         
  | All services displayed                                              [FAIL]    
  Some services are not running (pulpcore-api, pulpcore-content, pulpcore-worker@1.service, pulpcore-worker@2.service)
  
  Scenario [Status Services] failed.
  ...