Azure Event Hub receiver does not set ObservedTimestamp

[dentonk]

Component(s)

receiver/azureeventhub

What happened?

Description

The Azure Event Hub receiver does not set the the ObservedTimestamp for ingested logs.

Steps to Reproduce

Configure an Otel collector pipeline using the azureeventhub receiver and the file exporter with no additional processing and view the output log records.

Expected Result

Each log record should contain an ObservedTimestamp as described in the logs data model here.

Actual Result

In addition to the body, each log record only contains a timeUnixNano field but not an observedTimeUnixNano, as seen in other log records where the ObservedTimestamp is set.

Collector version

v0.115.0

Environment information

Environment

Docker Desktop 4.36.0 running on Mac OSX M3

OpenTelemetry Collector configuration

receivers:
  azureeventhub/AzureEH:
    connection: Endpoint=<REDACTED>
    format: raw
    group: $$Default
    offset: "-1"
    partition: ""
processors:
exporters:
  file/no_rotation:
    path: /output.log
extensions:
service:
  pipelines:
    logs/pipeline1:
      receivers:
        - azureeventhub/AzureEH
      processors:
      exporters:
        - file/no_rotation

Log output

{
  "resourceLogs":
  [
    {
      "resource":
      {},
      "scopeLogs":
      [
        {
          "scope":
          {},
          "logRecords":
          [
            {
              "timeUnixNano": "1734376978561000000",
              "body":
              {
                "bytesValue": "<REDACTED>"
              },
              "traceId": "",
              "spanId": ""
            }
          ]
        }
      ]
    }
  ]
}

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/azureeventhub: @atoulme @cparkins

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