A thread in the Active Directory® directory service is waiting for the completion of a remote procedure call (RPC) that was made to a domain controller. Active Directory has attempted to cancel the call and recover this thread.
A thread in Active Directory is waiting for the completion of a RPC made to the following domain controller.
Domain controller: %1
Thread ID: %2
Timeout period (minutes): %4
Active Directory has attempted to cancel the call and recover this thread.
If this condition continues, restart the domain controller.
For more information, see:
Microsoft Help and Support for Microsoft Windows Server 2008 and above
Microsoft Knowledge Base