MSExchangeTransport 17015

This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.

Details

Explanation

This Error event indicates that the Microsoft Exchange Transport service could not mount the Transport database on the Hub Transport server or on the Edge Transport server.

Starting with Microsoft Exchange Server 2007, the Microsoft Exchange Transport service uses an Extensible Storage Engine (ESE) database for mail queue storage. This design change improves read and write performance with respect to messaging queues and also allows for the messaging queues to be backed up. The message queue database and the Content Filtering database use circular logging. Therefore, you can't use the transaction logs for data recovery. Additionally, the transaction logs are re-created automatically during the startup of the Microsoft Exchange Transport service if they are missing. By default, the Microsoft Exchange Server 2010 Transport database files are located in the following directory:

%ProgramFiles%\Microsoft\Exchange Server\V14\TransportRoles\data\Queue

Because a single ESE database is used to store messaging queues, the Microsoft Exchange Transport service includes a "self healing" feature. This feature is designed to let Exchange recover from most of the issues that could cause the Transport database to fail. These include the following issues:

• Logical database corruption: When the Microsoft Exchange Transport service detects a "JET permanent exception" error that specifies database corruption, the service performs recovery actions. These actions either delete or move the database queue file, log files, or system directories. After the recovery actions are completed, the service creates a new database instance to continue message processing.

• File(s) not available: When the Microsoft Exchange Transport service detects a "JET permanent exception" error that specifies missing or locked database files, the service performs recovery actions. These actions either delete or move the database queue file, log files, or system directories. After the recovery actions are completed, the service creates a new database instance to continue message processing.

• Insufficient disk space: When the Microsoft Exchange Transport service detects a "JET permanent exception" error that specifies insufficient disk space, the service does not perform any recovery actions. For example, the error might specify that the database cannot be extended or that a log file cannot be created. In this scenario, the service shuts down.

• Database upgrade: When the Microsoft Exchange Transport service experiences a database version error, the service performs recovery actions. These actions either delete or move the database queue file, log files, or system directories. After the recovery actions are completed, the service creates a new database instance to continue message processing.

• Failed server disk replaced: When the Microsoft Exchange Transport service first starts after a failed hard disk has been replaced, the service detects a "JET permanent exception" error that specifies physical database corruption. In this scenario, the service performs recovery actions. These actions either delete or move the database queue file, log files, or system directories. After the recovery actions are completed, the service creates a new database instance to continue message processing.

The recovery actions may be modified by changing the value of the following key in the %ProgramFiles%\Microsoft\Exchange Server\V14\Bin\EdgeTransport.exe.config file:

<add key="QueueDatabaseRecoveryAction" value="<action>" />

The following action values are available:

• None: When this action is specified, the Microsoft Exchange Transport service does not try to recover. The service logs the database exception to the Application log and remains stopped until the Transport database is either repaired or deleted and the service restarted.

• Delete: When this action is specified, the Microsoft Exchange Transport service deletes the existing mail.que database and associated log files. Then, when the Microsoft Exchange Transport service starts, it creates new database and transaction log files.

  Note   With this action, any messages that are stuck in the messaging queues are lost.

• Move: When this action is specified, the Microsoft Exchange Transport service moves the existing transport database and log files to a directory named %ProgramFiles%\Microsoft\Exchange Server\V14\TransportRoles\Queue\Queue.old. Then, when the Microsoft Exchange Transport service starts, it creates new database and transaction log files.

• For more information, see Understanding Transport Queues.

User Action

To troubleshoot this issue, do one or more of the following:

• Review the Application log and System log on your Exchange 2010 servers for related events. For example, events that occur immediately before and after this event may provide more information about the root cause of this error.

• Review the Operations Console in Operations Manager for detailed information about the cause of this problem. For more information, see the "Introduction" section in this article.

• If a file-level antivirus scanner is running, verify that antivirus exclusions are configured appropriately. For more information, see File-Level Antivirus Scanning on Exchange 2010.

• You may want to increase diagnostics logging to log the components in the transport pipeline. To increase diagnostics logging for the Transport components, follow these steps:

  1. In the Exchange Server 2010 Management Console, expand Server Configuration, and then click Hub Transport.

     Note   For an Edge Transport server, click Edge Transport.

  2. In the Actions pane, click Manage Diagnostic Logging Properties for the appropriate server.

  3. Expand MSExchangeTransport.

  4. Click the following components, click Expert, then click Configure for each component:

     • Smtpreceive

     • Smtpsend

     • DSN

     • Components

     • Remote Delivery

     • Categorizer

• Determine whether the transport database is corrupted. To do this, follow these steps:

  1. Stop the Microsoft Exchange Transport service.

  2. Remove the transport database. To do this, rename the following folder:

     %ProgramFiles%\Microsoft\Exchange Server\V14\TransportRoles\data\Queue

  3. Start the Microsoft Exchange Transport service to determine whether mail flow is restored.

• Try to repair the Transport database to recover any queued messages. For more information, see Working with the Queue Database on Transport Servers.

• Resolve your issue by using self-support options, assisted support options, and other resources. You can access these resources from the Exchange Server Solutions Center. From this page, click Self-Support Options in the navigation pane to use self-help options. Self-help options include searching the Microsoft Knowledge Base, posting a question at the Exchange Server forums, and other methods. Alternatively, in the navigation pane, you can click Assisted Support Options to contact a Microsoft support professional. Because your organization may have a specific procedure for directly contacting Microsoft Product Support Services, be sure to review your organization's guidelines first.

For more information about the transport pipeline in Exchange 2010, see Understanding Transport Pipeline.

To obtain transport architecture diagrams, see the Exchange Server Team blog article, Exchange 2010 Transport Architecture Diagrams Available for Download.

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