Is there a plan to make @opentelemetry/exporter-jaeger usable in browser based application. Currently is there any way we can hit the jaeger from browser

[SunilManthenaG01]

• This only affects the JavaScript OpenTelemetry library
• This may affect other libraries, but I would like to get opinions here first

[jbadeau]

I am logging to Jaeger and propagating context from the browser using
Note that I am using a proxy to log to jaeger to workaround browser same origin policy

import { ConsoleSpanExporter, SimpleSpanProcessor } from '@opentelemetry/tracing';
import { WebTracerProvider } from '@opentelemetry/web';
import { FetchInstrumentation } from '@opentelemetry/instrumentation-fetch';
import { ZoneContextManager } from '@opentelemetry/context-zone';
import { registerInstrumentations } from '@opentelemetry/instrumentation';
import { ZipkinExporter } from '@opentelemetry/exporter-zipkin';

export const provider = new WebTracerProvider();

export const SERVICE_NAME = 'todo-ui';

provider.addSpanProcessor(new SimpleSpanProcessor(new ConsoleSpanExporter()));
provider.addSpanProcessor(new SimpleSpanProcessor(new ZipkinExporter({
    serviceName: SERVICE_NAME,
    headers: {
        "Content-Type": "application/json"
    },
    url: 'http://localhost:3000/api/v2/spans'
})));

provider.register({
    contextManager: new ZoneContextManager(),
});

registerInstrumentations({
    instrumentations: [new FetchInstrumentation()],
    tracerProvider: provider,
});

`

[SunilManthenaG01]

Correct me if I am wrong, I am new to this.
It seems like you are hitting Zipkin's using Zipkin exporter.
Can we use jaeger exporter and hit jaeger end point?

[dyladan]

The jaeger exporter doesn't work in the browser, but the zipkin exporter does. Fortunately, jaeger speaks the zipkin protocol so you can use the zipkin exporter to send spans to jaeger.

[SunilManthenaG01]

Ok nice, so basically in the browser, we need to use Zipkin's and log to a proxy url. Will try that one.
@dyladan and @jbadeau thank you for your help.

[HenrikTusz]

How do you correlate the traces sent by FE with the ones sent by BE. I have a SPA (react) with a Node express BE, where I tried the setup mentioned here. I send my spans batched. But in Jeager the spans end-up all unrelated.