Intermittent connectivity error while calling SQS from ECS

Question

Hi Team,

I have a issue where I get Intermittent below error when accessing SQS from ECS :-

{
  "level": "error",
  "ts": XXXXXXXXX.XXXXXX,
  "caller": "event-bus/sqs_bus.go:243",
  "msg": "Error receiving messages",
  "error": "operation error SQS: ReceiveMessage, exceeded maximum number of attempts, 3, https response error StatusCode: 0, RequestID: , request send failed, Post \"https://sqs.ap-south-1.amazonaws.com/\": dial tcp: lookup sqs.ap-south-1.amazonaws.com on \u0000\u0000\u0000\u0000\u0000\u0000\u00002:53: dial udp: lookup \u0000\u0000\u0000\u0000\u0000\u0000\u00002: no such host",
  "busType": "SQS",
  "busName": "connectorEventBus"
}
Seems it is not  network configuration issue to reach out to https://sqs.ap-south-1.amazonaws.com, as it is intermittent.

Any pointers would be appreciated.

Thanks in advance!

re:Post Agent · Answer

The error you're experiencing seems to be an intermittent connectivity issue when trying to access Amazon SQS from your ECS (Elastic Container Service) environment. This type of error can occur due to various reasons, but since it's intermittent, it's likely not a permanent network configuration problem.

Here are some potential causes and solutions to consider:

1. DNS Resolution Issues: The error message suggests a problem with DNS lookup. Ensure that your ECS task has proper DNS configuration and can resolve the SQS endpoint consistently.

2. Network Instability: Temporary network disruptions can cause such errors. Implement a robust retry mechanism with exponential backoff in your application to handle these transient failures.

3. VPC Endpoint Configuration: If you're using a VPC endpoint for SQS, verify that it's correctly set up and that the associated security groups and network ACLs allow the necessary traffic.

4. SDK Configuration: Ensure you're using the latest version of the AWS SDK and that it's configured correctly with appropriate timeout and retry settings.

5. ECS Task Networking: Check the networking mode of your ECS tasks and ensure they have consistent internet connectivity if required.

6. Resource Constraints: Monitor your ECS cluster for any resource constraints that might be affecting network operations.

To troubleshoot:

1. Implement logging to capture more details about the frequency and context of these errors.

2. Use AWS X-Ray or similar tracing tools to get insights into the network path and identify potential bottlenecks.

3. Consider implementing a circuit breaker pattern to handle temporary service unavailability gracefully.

4. Monitor AWS service health and check for any reported issues in the ap-south-1 region.

If the issue persists after implementing these suggestions, you may need to engage AWS support for a more in-depth investigation of your specific environment and configuration.  
**Sources**  
[Troubleshoot Amazon SQS network errors - Amazon Simple Queue Service](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/troubleshooting-network-errors.html)  
[Troubleshooting issues in Amazon SQS - Amazon Simple Queue Service](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-troubleshooting.html)  
[Handling request errors in Amazon SQS - Amazon Simple Queue Service](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/handling-request-errors.html)  
[Troubleshoot Amazon SQS connection errors | AWS re:Post](https://repost.aws/knowledge-center/sqs-connection-error)

Intermittent connectivity error while calling SQS from ECS

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