Unknown Server Error "504 Gateway Time-out" Occurs When Accessing Amazon Athena

Issue

Unknown Server Error "504 Gateway Time-out" occurs when accessing a workbook that embedded a connection of Amazon Athena.

Example (Japanese):
User-added image

Environment

Tableau Server
Amazon Athena
JDBC

Resolution

If no load balancer or proxy server is configured, test connection in AWS Glue. For more information see The AWS Glue test connection failed (AWS Glue).
If using a load balancer or proxy server, see Error 504 Gateway Timeout When Loading Workbooks on Tableau Server.

Cause

This is due to the networking issue outside of Tableau Server.

Additional information

Since it's a networking issue, this may also occur when accessing a published data source. The following error can be found in the logs.
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Check the session id, error "Deadline Exceeded" can be found in nativeapi_vizqlserve log, example:
// ziplogs\node1\vizqlserver_0.20204.21.0114.091613474692966834480720\logs\nativeapi_vizqlserver_1-0_2021_03_03_00_00_00.txt
{"ts":"2021-03-03T17:32:55.188","pid":108865,"tid":"1b927","sev":"warn","req":"YD9JA83SgGwqOAEfycsvJwAAABM","sess":"72BAC7120C064C1FBBECCD484F62373F-1:0","site":"<sitename>","user":"<username>","k":"excp","e":{"excp-error-code":"0xFAB9A2C5","excp-source":"NeedsClassification","excp-status-code":"UNKNOWN"},"v":{"class":"genericjdbc","dse-type":"Unknown","excp-msg":"Deadline Exceeded\n","excp-type":"ConnectivityException","is-bad-request":false,"is-capability-probe-failure":false,"is-local-configuration-error":false,"is-remote-configuration-error":false,"msg":"ConnectivityException::Init"}}