Unexpected double count when using Count with datadog-go/v5 statsd client

[masumluf]

I’m using github.com/DataDog/datadog-go/v5/statsd to send Count metrics to Datadog. However, I’m seeing twice the count I expect.

Code to Reproduce

main.go

package main

import (
        "log"
        "time"
        "github.com/DataDog/datadog-go/v5/statsd"
)

func main() {
        statsd, err := statsd.New("127.0.0.1:8125")
        if err != nil {
                log.Fatal(err)
        }

        for i := 1; i <= 10; i++ {
                statsd.Count("example_metric.count", 1, []string{"environment:dev"}, 1)
                log.Printf("Sent metric %d", i)
                time.Sleep(1 * time.Second)
        }
}

Expected Behavior

I expect to see a count of 10 in Datadog after sending 10 metrics.

Actual Behavior

Instead, I see a count of 20.

The logs show the loop only runs 10 times.

But in Datadog, the count doubles.

[atanzu]

Hi @masumluf ,
Thank you for reporting this issue.

Could you please share a bit more information so we could reproduce it? We are interested in how are you sending this data back to DataDog, do you have any specific Agent configuration?

Also, when you see double-metrics in the web UI:

• do they have the same timestamps?
• how do you query those? Counts are normalized to per second and the displayed value depends on how it is queried.