Problem Description in Azure:
"Backup extension installation failed due to insufficient memory available in COM+ memory quota."
Suggested Actions in Azure:
"Please restart the Windows service 'COM+ System Application' (COMSysApp). If the issue persists, restart the VM. For more details, refer to https://aka.ms/AB-ExtensionSnapshotFailed."
Purpose:
Provide a procedure to resolve backup failures caused by issues with the "COM+ System Application" service in Windows.
Scope:
Applies to all IT staff responsible for backups on Windows servers using Azure.
Problem:
The backup operation failed due to an issue with the "COM+ System Application" service in Windows. This document outlines the steps to resolve this issue.
Solution:
Step 1: Start/Restart the COM+ System Application Service.
- Open an elevated command prompt. To do this, search for "cmd" in the start menu, right-click on "Command Prompt," and select "Run as administrator."
- In the command prompt, run the following command to start or restart the "COM+ System Application" service:
If the service is already running, use:
- net stop COMSysApp && net start COMSysApp
Step 2: Ensure the Distributed Transaction Coordinator Service (MSDTC) Runs as a Network Service Account.
- Open the Windows services console. Press Windows + R, type "services.msc," and press Enter.
- Find the "Distributed Transaction Coordinator" service.
- Double-click on the service to open its properties.
- Go to the "Log On" tab.
- Ensure that the "Network Service" account option is selected. If not, select "This account" and enter "NT AUTHORITY\NetworkService." No password is required for this account (if there is another default account, do not change it; just apply the change).
- Click "Apply" and then "OK."
- Restart the Distributed Transaction Coordinator service from the same services window. Right-click on the service and select "Restart."
Step 3: Reinstall the Distributed Transaction Coordinator Service (MSDTC) if it Cannot be Restarted.
- Open an elevated command prompt as described in Step 1.
- Stop the MSDTC service with the following command:
Uninstall the MSDTC service by running:
Reinstall the MSDTC service by running:
Start the MSDTC service with:
Start the Windows COM+ System Application service with:
Step 4: Run the Backup Job from Azure Portal.
- Log in to the Azure Portal.
- Navigate to the VM and go to "Backup and Disaster Recovery"/"Backup."
- Select the backup job you want to run and launch it manually. By following these steps, you should be able to resolve the issue with the COM+ System Application service and execute the backup operation without any issues.