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How the DTC Handles Computer Failures

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Applies To: Windows 10, Windows 7, Windows 8, Windows 8.1, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server Technical Preview, Windows Vista

If a computer fails and then restarts, the transaction manager at that computer normally determines the outcome of all in-doubt transactions. The following list includes the actions that a transaction manager ordinarily takes after a failure:

  • For transactions for which it was the commit coordinator, the transaction manager reads its log file to determine the outcome.

  • For incoming transactions from other systems, the transaction manager reads the log file to determine whether it was previously notified of the outcome of the transaction.

  • For incoming transactions that remain in doubt, the transaction manager queries the incoming transaction manager to learn the outcome of the transaction.

  • The transaction manager also responds to queries from other transaction managers regarding in-doubt outgoing transactions sent to them. This is similar to the protocol that transaction managers and resource managers follow at restart. The transaction manager determines the outcome of each in-doubt transaction and, when asked, tells the resource managers the transaction outcome.

See Also

DTC Event Messages
DTC Transaction States
Example: Transaction Resolution After System Failure
Transaction State Resolution After System Failure