Athena Query Editor - Network Failure

Question

I've configured the Athena connection to a RDS SQL Server database using a JDBC driver. After choosing the Data Source the Database does not load and there is a "Network Failure" shown without any information. What might be the cause of such error or where I can find more information on how to solve such case? 
![Enter image description here](/media/postImages/original/IMQajw0sQHTgyDgntZCvLPJg)

Answer

Could you check if there any CloudTrail logs to describe the network issue in details - https://docs.aws.amazon.com/athena/latest/ug/monitor-with-cloudtrail.html? 
Besides, could you also check the configuration "SubnetIds" of Lambda function (AthenaSqlServerConnector) for JDBC driver is in the same VPC to your RDS SQL Server, but also the Security Group and NACLs of RDS SQL Server is allowed to be accessed (inbound) from Lambda of your Security Group?

Athena Query Editor - Network Failure

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