RHEL6: Desktop environment cannot be started with error "Couldn't connect to system bus: The maximum number of active connections for UID 0 has been reached"

Solution Verified - Updated -

Issue

  • Desktop environment cannot be started.
  • The error below is logged frequently in log files under /var/log/gdm:
(gdm-simple-slave:8610): WARNING **: Couldn't connect to system bus: The maximum number of active connections for UID 0 has been reached

Environment

  • Red Hat Enterprise Linux 6
  • Desktop Environment

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