One of the clustered SQL Server was "restarted" (not failover) yesterday mysteriously.

We only know that it's something to do with MSDTC. Here are the log entries

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Date 12/11/2007 3:14:02 PM
Log SQL Server (Archive #1 - 12/11/2007 3:15:00 PM)

Source Server

Message
The connection has been lost with Microsoft Distributed Transaction Coordinator (MS DTC). Recovery of any in-doubt distributed transactions involving Microsoft Distributed Transaction Coordinator (MS DTC) will begin once the connection is re-established. This is an informational message only. No user action is required.

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Date 12/11/2007 3:15:30 PM
Log SQL Server (Archive #1 - 12/11/2007 3:15:00 PM)

Source spid53

Message
Configuration option 'Agent XPs' changed from 1 to 0. Run the RECONFIGURE statement to install.

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Date 12/11/2007 3:15:44 PM
Log SQL Server (Archive #1 - 12/11/2007 3:15:00 PM)

Source spid35s

Message
Service Broker manager has shut down.

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Date 12/11/2007 3:15:46 PM
Log SQL Server (Archive #1 - 12/11/2007 3:15:00 PM)

Source spid11s

Message
SQL Server is terminating in response to a 'stop' request from Service Control Manager. This is an informational message only. No user action is required.

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Date 12/11/2007 3:15:46 PM
Log SQL Server (Archive #1 - 12/11/2007 3:15:00 PM)

Source spid11s

Message
SQL Trace was stopped due to server shutdown. Trace ID = '1'. This is an informational message only; no user action is required.

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----Then restart happened.

Thanks in advance.