我有一个Windows Server 2008 R2作为我的域控制器运行。 它负责Active Directory，DNS和DHCP。 这是森林里唯一的一个DC。 Active Directory每小时报告错误：
Active Directory Domain Services was unable to establish a connection with the global catalog. Additional Data Error value: 8430 The directory service encountered an internal failure. Internal ID: 3200db0 User Action: Make sure a global catalog is available in the forest, and is reachable from this domain controller. You may use the nltest utility to diagnose this problem. dcdiag ，一切都通过了。 General failure.