RHEL7: 在将 dbus 从 dbus-1.6.12 更新到 dbus-1.10.24 后，系统出现问题，在日志中出现类似 "Lost the name org.freedesktop.PolicyKit1 - exiting" 的信息

Issue

• busctl 命令抛出以下出错信息

  # busctl
  Failed to connect to bus: Connection refused
  

  注意： 在某些情况下，您可能会看到 No such file or directory 错误消息，而不是 Connection deniedd。

• polkit.service 单元没有运行，显示以下信息

  # systemctl status polkit.service
  ● polkit.service - Authorization Manager
     Loaded: loaded (/usr/lib/systemd/system/polkit.service; static; vendor preset: enabled)
     Active: inactive (dead) since Mon 2019-06-03 11:35:21 CEST; 21min ago
  [...]
  [...] polkitd[638]: Loading rules from directory /etc/polkit-1/rules.d
  [...] polkitd[638]: Loading rules from directory /usr/share/polkit-1/rules.d
  [...] polkitd[638]: Finished loading, compiling and executing 2 rules
  [...] polkitd[638]: Lost the name org.freedesktop.PolicyKit1 - exiting
  

• NetworkManager.service 单元处于 activating 状态而不是 active 状态

  # systemctl status NetworkManager
  ● NetworkManager.service - Network Manager
     Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: activating (start) since Mon 2019-06-03 11:53:26 CEST; 1min 3s ago
  [...]
  
  # systemctl list-jobs
   JOB UNIT                   TYPE  STATE  
  1791 NetworkManager.service start running
  

• systemd-login.service 单元持续失败

  # systemctl status systemd-logind
  ● systemd-logind.service - Login Service
     Loaded: loaded (/usr/lib/systemd/system/systemd-logind.service; static; vendor preset: disabled)
     Active: failed (Result: start-limit) since Mon 2019-06-03 11:35:21 CEST; 21min ago
  [...]
  [...] systemd[1]: start request repeated too quickly for systemd-logind.service
  [...] systemd[1]: Failed to start Login Service.
  [...] systemd[1]: Unit systemd-logind.service entered failed state.
  [...] systemd[1]: systemd-logind.service failed.
  

• 在系统引导后，日志出现多个与 dbus 相关的各种错误消息（错误信息重复多次）

  # journalctl -b -p err
  systemd-logind[640]: Failed to connect to system bus: Connection refused
  systemd-logind[640]: Failed to fully start up daemon: Connection refused
  login[671]: pam_systemd(login:session): Failed to connect to system bus: Connection refused
  NetworkManager[835]: <error> [1559554611.6628] dispatcher: could not get dispatcher proxy! Could not connect: Connection refused
  NetworkManager[835]: <error> [1559554611.6856] auth: could not get polkit proxy: Could not connect: Connection refused
  

  注意： 在某些情况下，您可能会看到 No such file or directory 错误消息，而不是 Connection deniedd。