Hello Databricks Community,

The driver node was lost, which might occur as a result of network problems or malfunctioning instances, according to the error message. Here are some potential causes and remedies:

Instance Instability: Consider switching to a different instance type if your cloud provider offers unstable instances.
Networking Problems: Make sure that consistent connectivity between nodes is enabled by your VPC and security group settings.

Autoscaling Interruption: Driver instability may occasionally result from severe autoscaling. Try changing the scaling parameters.
Databricks Event History & Logs: To learn more about the reasons behind the driver's disappearance, view the logs in the Databricks event timeline.
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Please let me know if you require any other help.