This error is mostly related to Microsoft TCP/IP drivers.
While starting the docbase we may see this message several times in the log file. To resolve this microsoft release one hotfix which can solve this problem. Hotfix can be downloaded at
http://support.microsoft.com/kb/979230
From the microsoft site:
This issue occurs because of a race condition in the TCP/IP driver
(Tcpip.sys).
When the race condition occurs, the disconnection notification is not
sent at the required time. This behavior orphans some TCP connections.
Therefore, the applications or services that rely on these connections
fail. Additionally, these connections remain in the LAST_ACK
state, in the FIN_WAIT_2 state, or in the CLOSING state.
We must restart the server after applying the hotfix so we need to plan accordingly.