Azure / Azure/azure-functions-host

Application Insights is filled with EventProcessor.Process logs that cannot be filtered out when OpenTelemetry enabled

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#11,769 0 comments 1 reaction 1 assignee Claimed by @RohitRanjanMS View on GitHub
Needs: Triage (Functions)
Dominant language
C#
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Description

#### Investigative information

Please provide the following:

- Timestamp: 2026-05-12T20:44:34.9646501Z
- Function App version: azurefunctions:4.1048.0.0_dotnet8.0.25:otel1.14.0:ext1.5.0
- Invocation ID: aa87f17652e62745
- Region: Canada Central

#### Repro steps

Provide the steps required to reproduce the problem:

1. enable OpenTelemetry in Azure Functions using Application Insights:
```csharp
services.AddOpenTelemetry()
.UseFunctionsWorkerDefaults()
.UseAzureMonitorExporter();
```
2. modify host.json to set telemetryMode
```json
"version": "2.0",
"telemetryMode": "OpenTelemetry"
```
3. use EventHubTrigger
4. Check application insights logs
5. Requests table is filled with EventProcessor.Process operations that cannot be disabled
#### Expected behavior

There should be a setting to turns this messages off.

#### Actual behavior

I tried multiple options but all options keep producing telemetry.
options tried:
1.
```json
"logging": {
"logLevel": {
"default": "Warning"
},
"OpenTelemetry": {
"logLevel": {
"default": "Warning"
}
}
}
```
2. set AZURE_TRACING_DISABLED = true

#### Known workarounds

I was unable to find any workarounds

#### Related information

Seems related to https://github.com/microsoft/aspire/issues/10225

* Programming language used: c#
* Bindings used: EventHubTrigger

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