[bug]: Duplicated metric data values

[peterpakos]

What did you do

We are scraping custom CloudWatch metrics coming from Artillery.

Configuration snippet:

region: eu-west-2
role_arn: arn:aws:iam::xxx:role/grafana
delay_seconds: 0
use_get_metric_data: true
metrics:
  - aws_namespace: PerformanceTesting
    aws_metric_name: "http.requests"
    aws_dimensions: [Name, Test]
    aws_statistics: [Sum]

Metric data shown in CloudWatch UI:

Metric data returned from CloudWatch API:

{
    "MetricDataResults": [
        {
            "Id": "m1",
            "Label": "http.requests",
            "Timestamps": [
                "2024-09-24T12:31:00+00:00",
                "2024-09-24T12:30:00+00:00"
            ],
            "Values": [
                16.0,
                44.0
            ],
            "StatusCode": "Complete"
        }
    ],
    "Messages": []
}

What did you expect to see?

Prometheus metrics in Grafana matching metrics in CloudWatch.

What did you see instead? Under which circumstances?

First 2 data points matching CloudWatch then the last value repeated for 5-10 minutes.

Metric data in Grafana:

Are you currently working around this issue?

No

Environment

# docker images | grep cloudwatch-exporter
prom/cloudwatch-exporter             latest    70a238bc9c70   5 weeks ago     297MB