Hello Databricks Community,

The error message indicates that the driver node was lost, which can happen due to network issues or malfunctioning instances. Here are a few possible reasons and solutions:

1. Instance Instability: If your cloud provider has unstable instances, try using a different instance type.
2. Networking Issues: Ensure your VPC and security group settings allow stable communication between nodes.
3. Autoscaling Interruption: Sometimes, aggressive autoscaling can cause driver instability. Try adjusting the scaling settings.
4. Databricks Logs & Event History: Check the logs in the Databricks event timeline for more details on why the driver was lost.

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Let me know if you need further assistance.

Best regards!!