Hyper-V 来宾的 W32Time 同步问题（W32Time 事件 ID 38、24、29、35）

在域环境中运行 Hyper-V 的 Windows 客户机上，我注意到 Windows 时间服务出现问题。定期，我在系统日志中收到以下三条消息。

Event Type: Information
Event Source:   W32Time
Event Category: None
Event ID:   38
Date:       6/11/2009
Time:       12:26:15 PM
User:       N/A
Description:
The time provider NtpClient cannot reach or is currently receiving invalid time data from xxx.xxx.xxx (ntp.d|a.b.x.y:123->a.b.x.z:123).

Event Type: Warning
Event Source:   W32Time
Event Category: None
Event ID:   24
Date:       6/11/2009
Time:       12:42:47 PM
User:       N/A
Description:
Time Provider NtpClient: No valid response has been received from domain controller xxx.xx.xxxx after 8 attempts to contact it. This domain controller will be discarded as a time source and NtpClient will attempt to discover a  new domain controller from which to synchronize.

Event Type: Error
Event Source:   W32Time
Event Category: None
Event ID:   29
Date:       6/11/2009
Time:       12:42:47 PM
User:       N/A
Description:
The time provider NtpClient is configured to acquire time from one or more time sources, however none of the sources are currently accessible.  No attempt to contact a source will be made for 15 minutes. NtpClient has no source of accurate time. 

重新启动 Windows 时间服务后，它会成功与域控制器同步（事件 ID 37），但随后我注意到服务器也进行了另一次同步尝试：

Event Type: Information
Event Source:   W32Time
Event Category: None
Event ID:   35
Date:       6/11/2009
Time:       1:04:30 PM
User:       N/A
Description:
The time service is now synchronizing the system time with the time source VM IC Time Synchronization Provider.

这样做的最终结果是 W32Time 没有与域控制器正确同步，因为成员服务器默认情况下应该这样做。所有其他服务器和工作站都与域控制器正确同步。