Azure Monitor
An Azure service that is used to collect, analyze, and act on telemetry data from Azure and on-premises environments.
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VM Guest Agent has the AMA extension installed and enabled, but only the AMAExtHealthMonitor process is running
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Daniel Essel
0
Reputation points
VM Guest Agent has the AMA extension installed and enabled, but only the AMAExtHealthMonitor process is running.
It's unable to validate the persistence key for the data store at path: C:\WindowsAzure\Resources\AMADataStore.<computer_name>.persistencekey.
The file in fact does not exist, but the registry key does. However, since the file doesn't exist the AMAExtHealthMonitor process is unable to successfully start the other AMA core processes.
I already have a ticket open w/ Microsoft Support, but I'm not gaining any traction. It's happening for a few VMs we manage and ONLY on version 1.34.0.0 (latest stable release).
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Pranay Reddy Madireddy 3,835 Reputation points Microsoft External Staff2025-04-17T19:04:10.8466667+00:00 Hi Daniel Essel
Verify the AMA extension has been correctly installed. You can review the installation logs in the following location:
C:\WindowsAzure\Logs\WaAppAgent.log
Look for any errors or warnings that might point to issues during the extension setup.
Although the registry key exists, the required persistence file does not. We recommend checking the relevant registry settings under:
HKLM\SOFTWARE\Microsoft\Azure\AzureMonitorAgent
Confirm that paths and file references in the registry match expected values and that the referenced file(s) exist on disk.
If the issue persists, please try uninstalling and then reinstalling the AMA extension on the affected VM. This can help regenerate any missing files or resolve potential corruption. You can perform this through the Azure portal or by using Azure CLI/PowerShell.
https://learn.microsoft.com/en-us/troubleshoot/azure/azure-monitor/azure-monitor-agent/ama-windows-installation-issues-prepare-troubleshooting
https://learn.microsoft.com/en-us/troubleshoot/azure/azure-monitor/azure-monitor-agent/ama-windows-installation-issues-detailed-troubleshooting-stepslet us know if any help, we will always help as you needed.!
If the comment is helpful, please click "Upvote it".
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Pranay Reddy Madireddy 3,835 Reputation points Microsoft External Staff
2025-04-18T17:41:52.0166667+00:00 Hi Daniel Essel
If you had a chance to see my Answer to your question. If it was helpful, please click "Upvote" and ''accept answer'' on my post let us know Thank you...!
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