GW8.0.1mult on the OES2SP1 ( 4 POA and 2 MTA)

At the 20:04 all MTA and POA go to the shutdown ..
I`m do not understand Why.... :(

In the log-file KUJBP-POA i see records:
....
20:04:26 680 C/S Login Windows Net Id=user1.buh.ff.ami ::GW Id=user1 :: 172.17.15.23
20:04:26 680 Opening remote C/S session for: user1
20:04:33 912 C/S Login Windows Net Id=user2.ac0.ff.ami ::GW Id=user2 :: 172.17.15.11
20:04:58 064 Exit Key Received: Exiting
20:04:58 112 TCP/IP disconnected [890F] (/gwsystem/kujbd/gwkujbp/oftemp/gwdca/in/4aa1727a.tmp) (see GWDCA log)
20:04:58 008 Accumulated POA Statistics Data
20:04:58 008 Up Time: 3 Days 4 Hours 37 Minutes
20:04:58 008 C/S Requests: 31663
20:04:58 008 Client Caching Requests: 15436
20:04:58 008 Client Caching Primed: 0
20:04:58 008 Message Processed: 52765
20:04:58 008 Message Undelivered: 929
20:04:58 008 GWCheck Requsts: 4338
20:04:58 008 SOAP Requests: 17810
20:04:58 008 Successful Documents Converted: 10784
20:04:58 008 Unsuccessful Documents Converted: 210
20:04:58 008
20:04:58 112 Error [DF14], updating index: userg90.db, 18555
.....

In the PRIMD-mtalog:
....
20:04:58 480 DIS: Processing shutdown request
20:04:58 480 DIS: MTA shutdown in progress
20:04:58 480 Shutting down thread: GWSOAP-Listener
20:04:58 480 Shutting down thread: GWHTTP-Listener
20:04:58 480 Shutting down thread: GWTCP-Dispatcher
20:04:58 696 Exiting GWHTTP-Listener
20:04:58 144 Exiting GWSOAP-Listener
.....

How to learn - wher from the command on unloading POA and MTA has arrived?
(Who or what has given it a command on an unloading?)

Serg