Issue

• The NetworkManager service fails to start and NetworkManager tools such as nmcli return the following error:

  /usr/sbin/NetworkManager: symbol lookup error: /lib64/libgudev-1.0.so.0: undefined symbol: g_type_class_adjust_private_offset
  

• systemd reports the NetworkManager service has failed for trying to restart too quickly:

  # systemctl status NetworkManager -l
  ● NetworkManager.service - Network Manager
     Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: failed (Result: start-limit) since Wed 2016-01-13 13:33:35 EST; 37min ago
    Process: 1102 ExecStart=/usr/sbin/NetworkManager --no-daemon (code=exited, status=127)
   Main PID: 1102 (code=exited, status=127)
  
  Jan 13 13:33:35 rhel7.example.com systemd[1]: NetworkManager.service: main process exited, code=exited, status=127/n/a
  Jan 13 13:33:35 rhel7.example.com systemd[1]: Failed to start Network Manager.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: Unit NetworkManager.service entered failed state.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: NetworkManager.service failed.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: NetworkManager.service holdoff time over, scheduling restart.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: start request repeated too quickly for NetworkManager.service
  Jan 13 13:33:35 rhel7.example.com systemd[1]: Failed to start Network Manager.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: Unit NetworkManager.service entered failed state.
  Jan 13 13:33:35 rhel7.example.com systemd[1]: NetworkManager.service failed.