[BUG] Azure.Monitor.OpenTelemetry.Exporter 1.0.0-beta.13 creates ReadOnlyDictionary messages

[cataggar]

Library name and version

Azure.Monitor.OpenTelemetry.Exporter 1.0.0-beta.13

Describe the bug

When I upgrade from 1.0.0-beta.12 to 1.0.0-beta.13 in this internal PR, a bunch of new traces show up with System.Collections.ObjectModel.ReadOnlyDictionary\u00602[System.String,System.Object] as the message.

In the VS output window while debugging, the json shows:

{"name":"Message","time":"2023-07-25T09:26:22.6228639Z","iKey":"6dd2e7ec-afc5-4231-8bce-075f266bf999","tags":{"ai.cloud.role":"unknown_service:func","ai.cloud.roleInstance":"CPC-catag-TL2L0","ai.internal.sdkVersion":"dotnet6.0.9:otel1.5.0:ext1.0.0-beta.13"},"data":{"baseType":"MessageData","baseData":{"message":"System.Collections.ObjectModel.ReadOnlyDictionary\u00602[System.String,System.Object]","severityLevel":"Information","properties":{"Name":"StartExpireTrials","Count":"1","Timestamp":"7/25/2023 9:25:56 AM \u002B02:00","AvgDurationMs":"00:00:00.5144233","MaxDurationMs":"00:00:00.5144233","MinDurationMs":"00:00:00.5144233","Successes":"1","Failures":"0","SuccessRate":"100"},"ver":2}}}

In the Azure Portal, the new entries look like this:

There is one for each Activity.

Expected behavior

It behaves like 1.0.0-beta.12 and they do not get output.

Actual behavior

It gets output.

Reproduction Steps

I linked to the PR.

Environment

Our global.json:

{
  "sdk": {
    "version": "7.0.302",
    "rollForward": "latestMinor",
    "allowPrerelease": false
  }
}

We are using Azure Functions based on this Dockerfile with:

FROM mcr.microsoft.com/azure-functions/dotnet:4.0.1.16816-dotnet6-appservice

[github-actions]

Thank you for your feedback. This has been routed to the support team for assistance.

[navba-MSFT]

Adding Service team to look into this.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @cijothomas @reyang @rajkumar-rangaraj @TimothyMothra @vishweshbankwar.