[receiver/splunk_hec] Cannot read a single metric value payload

[atoulme]

Component(s)

receiver/splunkhec

What happened?

Description

The user is sending a single metric value with one _value field.

Steps to Reproduce

Send

{
  "index": "foo_events",
  "event": "metric",
  "source": "foo",
  "sourcetype": "foo-metrics",
  "fields": {
    "_value": 51.0,
    "metric_name": "foo.db_read_counter_tombstone:1drate",
    "foo": "bar",
    "cloudProvider": "aws",
    "cloudRegion": "us-east-2"
  }
}

to the collector over POST.

Expected Result

We evaluate one gauge data point under name foo.db_read_counter_tombstone:1drate with value 51.0.

Actual Result

We don't see any metric ingested.

Collector version

0.100.0

Environment information

Environment

OS: (e.g., "Ubuntu 20.04")
Compiler(if manually compiled): (e.g., "go 14.2")

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

No response