Initializing two Application Insights Clients

[eric-gonzalez-tfs]

I am using applicationinsights@3.0.0-beta.6.

The project I'm working on requires certain data to ALWAYS be sent, and others to be sent on a sampling ratio.

When I try to initialize a second client with a 100% sampling ratio and most autocollection config off, I get a duplicate registration error.

What is the best way to create a second client that sends 100% of the data without initializing anything else under the hood?

[eric-gonzalez-tfs]

Hi Team, any insight here would be much appreciated.

[eric-gonzalez-tfs]

Hi @hectorhdzg, any advice here?

[hectorhdzg]

@eric-gonzalez-tfs sorry for the delay, yes this a topic we had been discussing last few weeks, because of OpenTelemetry architecture having multiple clients independent on each other is not achievable anymore, this can be done in a different way depending on your scenario, you basically call useAzureMonitor method to initialize all OpenTelemetry components, then you can create a custom Span Processor sending to Azure Monitor as well using different sampling ratio, I can provide some code sample if it works.

[eric-gonzalez-tfs]

@eric-gonzalez-tfs sorry for the delay, yes this a topic we had been discussing last few weeks, because of OpenTelemetry architecture having multiple clients independent on each other is not achievable anymore, this can be done in a different way depending on your scenario, you basically call useAzureMonitor method to initialize all OpenTelemetry components, then you can create a custom Span Processor sending to Azure Monitor as well using different sampling ratio, I can provide some code sample if it works.

@hectorhdzg Thank you for the response - that would be great.

[hectorhdzg]

You can do something like this

import { useAzureMonitor, AzureMonitorOpenTelemetryOptions } from "applicationinsights";
import { AzureMonitorTraceExporter, ApplicationInsightsSampler } from "@azure/monitor-opentelemetry-exporter";
import { BatchSpanProcessor} from "@opentelemetry/sdk-trace-base";
import { NodeTracerProvider, NodeTracerConfig } from "@opentelemetry/sdk-trace-node";


// Initialize OpenTelemetry, all data will be sampled in
useAzureMonitor({
    samplingRatio: 1
});

// Create another Tracer Provider using different sampling mechanism
const aiSampler = new ApplicationInsightsSampler(0.5);
const tracerConfig: NodeTracerConfig = {
    sampler: aiSampler,
};
const tracerProvider = new NodeTracerProvider(tracerConfig);
// Add SpanProcessor sending with different sampling ratio
let azureMonitorExporter = new AzureMonitorTraceExporter({
    connectionString: "your_connectionString",
})
tracerProvider.addSpanProcessor(new BatchSpanProcessor(azureMonitorExporter));

const span= tracerProvider.getTracer("tesTracer").startSpan("testSpan");
span.end();