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event_name field skipped when unmarshalling LogRecord from Json #13127

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@IgorPidik

Description

@IgorPidik

Component(s)

pdata

What happened?

Describe the bug
event_name field skipped when unmarshalling LogRecord from Json

Steps to reproduce
event.json:

{
  "resourceLogs": [
    {
      "resource": {
        "attributes": [
          {
            "key": "service.name",
            "value": {
              "stringValue": "my.service"
            }
          }
        ]
      },
      "scopeLogs": [
        {
          "scope": {
            "name": "my.library",
            "version": "1.0.0",
            "attributes": [
              {
                "key": "my.scope.attribute",
                "value": {
                  "stringValue": "some scope attribute"
                }
              }
            ]
          },
          "logRecords": [
            {
              "eventName": "browser.page_view",
              "timeUnixNano": "1544712660300000000",
              "observedTimeUnixNano": "1544712660300000000",
              "severityNumber": 9,
              "severityText": "test severity text",
              "attributes": [
                {
                  "key": "event.attribute",
                  "value": {
                    "stringValue": "some event attribute"
                  }
                }
              ],
              "body": {
                "kvlistValue": {
                  "values": [
                    {
                      "key": "type",
                      "value": {
                        "intValue": "0"
                      }
                    },
                    {
                      "key": "url",
                      "value": {
                        "stringValue": "https://www.guidgenerator.com/online-guid-generator.aspx"
                      }
                    },
                    {
                      "key": "referrer",
                      "value": {
                        "stringValue": "https://wwww.google.com"
                      }
                    },
                    {
                      "key": "title",
                      "value": {
                        "stringValue": "Free Online GUID Generator"
                      }
                    }
                  ]
                }
              }
            }
          ]
        }
      ]
    }
  ]
}

finally run:

$ curl -X POST -H "Content-Type: application/json" -d @events.json -i localhost:4318/v1/logs

What did you expect to see?
Event name included in the debug output

What did you see instead?
Event name is missing

Collector version

v0.127.0

Environment information

Environment

OS: macOS 14.0
Compiler(if manually compiled): go1.24.3 darwin/arm64

OpenTelemetry Collector configuration

extensions:
  zpages:
    endpoint: localhost:55679

receivers:
  otlp:
    protocols:
      grpc:
        endpoint: localhost:4317
      http:
        endpoint: localhost:4318

processors:
  batch:
  memory_limiter:
    # 75% of maximum memory up to 2G
    limit_mib: 1536
    # 25% of limit up to 2G
    spike_limit_mib: 512
    check_interval: 5s

exporters:
  debug:
    verbosity: detailed

service:
  pipelines:
    traces:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [debug]
    metrics:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [debug]
    logs:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [debug]

  extensions: [zpages]

Log output

Additional context

No response

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