Hello, 

Thanks for contacting Databricks Support. 

From the error message: [Bootstrap Event] Can reach databricks-prod-artifacts-us-east-1.s3.amazonaws.com: [FAILED]. It suggests an issue with reaching a Databricks-related AWS S3 bucket from your environment. The DNS output for databricks-update-oregon.s3.us-west-2.amazonaws.com indicates that a DNS server at 10.10.0.2 is being queried. This type of issue can arise due to network configuration or connectivity problems.

You were able to establish a successful connection to databricks-update-oregon.s3.us-west-2.amazonaws.com on port 443 (HTTPS) from the new instance you created in the same security group. Considering this, we need to address the initial issue of not being able to SSH into the first instance:

• Since the new instance is accessible, compare its configuration with the first instance to identify any discrepancies.
• Verify that the route table associated with the subnet allows outbound traffic and has the appropriate routes for inbound SSH traffic.
• Check the network ACLs for rules that might be blocking inbound SSH traffic.
• Check if DNS hostname is enabled in the VPC.

Regards,