Why does report generation always fail with a 504 Timeout error?

[Paul-AWS]

When generating report in OpenSearch Dashboard, it runs about 1 minute and failed. The status code is 504 Gateway Timeout. How to fix it?

[Paul-AWS]

It’s because the default ALB idle timeout is 60s, while the generation of report may need more than 60s. So the ALB disconnect the session with OpenSearch after timeout. You need to change the ALB idle timeout setting to increase the connecting time to assure the completion of report generation.

1. In Centralized Logging with OpenSearch console, click the “OpenSearch Domains” in the left sidebar, then choose the OpenSearch cluster that you are using.
2. In “Access Proxy”, copy the “Load Balancer Domain” parameter.
3. Visit the EC2 console, and search the “Load Balancer Domain” you copied last step in the “Load Balancers”. Choose the load balancer, click “Actions”, then click “Edit attributes”.
4. In “Edit load balancer attributes”, change the value of “Idle timeout” to a larger period than report generating time.

If this issue still exist, check the Nginx idle timeout in Access Proxy instances.