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Event ID 4843 — COM+ Service Availability

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Applies To: Windows Server 2008

The COM+ service supports COM+ components that are running in COM+ applications, and it enables them to function correctly. Examples include COM+ Queued Components and COM+ Transactions.

Event Details

Product: Windows Operating System
ID: 4843
Source: Microsoft-Windows-Complus
Version: 6.0
Symbolic Name: IDS_E_CRM_DTC_ERROR
Message: The Compensating Resource Manager (CRM) has lost its connection with Microsoft Distributed Transaction Coordinator (MS DTC). This is expected if MS DTC has stopped, or if MS DTC failover has occurred on a cluster.%1%0

Resolve

Start the Microsoft Distributed Transaction Coordinator

The event message indicates that the problem might be resolved if you enable the Microsoft Distributed Transaction Coordinator (MS DTC). Determine whether the MS DTC is installed and properly configured. If it is not installed, you can use the Add Roles Wizard to add this role service to the Application Server role.

To perform these procedures, you must have membership in Administrators, or you must have been delegated the appropriate authority.

Determine whether the MS DTC is installed

To determine whether the MS DTC is installed:

  1. Click Start, and then click Run.
  2. Type comexp.msc, and then click OK. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. In the console tree of Component Services, click Services (Local).
  4. Scroll through the list of service names to find Distributed Transaction Coordinator.
  5. Confirm that the status of the service is Started. If the DTC is installed but not started, right-click Distributed Transaction Coordinator, and then click Start.

Check the MS DTC configuration

To check the MS DTC configuration:

  1. In the console tree of Component Services, click Component Services (Local).
  2. Expand Computers, expand My Computer, expand Distributed Transaction Coordinator, right-click Local DTC, and then click Properties.
  3. Click the tabs in the Properties dialog box to confirm that the configuration settings are correct.

Enable the MS DTC if it is not installed

To enable the MS DTC if it is not installed:

  1. Click Start, and then click Server Manager. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  2. Under Roles Summary, click Application Server.
  3. Click Add role services.
  4. On the Select Role Services page, click Distributed Transaction Support. Some role services require the installation of supporting features or role services from other roles. If this is the case, a dialog box appears. Click Add Required Features.
  5. Click Next to proceed to the Confirm Installation Options page.
  6. Click Install. After the installation process starts, input by the operator is not necessary. When the installation process is finished, the status of the installation appears on the Installation Results page.

Verify

You can verify that the required components are installed and that the role services are enabled by using Server Manager.

To perform these procedures, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To verify the status of installed components and role services:

  1. Click Start, and then click Server Manager.
  2. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. Under Roles Summary, click Application Server.
  4. Under Role Services, confirm that the status of Message Queuing Activation and Distributed Transactions is Installed.

In addition, you can verify that the COM+ operating system component is installed and working properly.

To verify that COM+ is working properly:

  1. Click Start, and then click Run.
  2. Type comexp.msc, and then click OK. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. In the console tree, click Services (Local).
  4. Scroll through the list of service names to find the following services: COM+ Event System (optional), COM+ System Application, DCOM Server Process Launcher, Distributed Transaction Coordinator, Message Queuing, and Remote Procedure Call (RPC).
  5. Confirm that the status of each service is Started.

COM+ Service Availability

Application Server