Exception: Demo Failed to Run

[zhuyifeiRuichuang]

In the document https://www.jaegertracing.io/docs/2.16/getting-started/, when i running HotROD Demo ，The buttons are completely unresponsive; it is just a static page.

The logs contain no exception information.

[dosubot[bot]]

Hi @zhuyifeiRuichuang! I'm Dosu and I’m helping the jaeger team.

The HotROD demo buttons being unresponsive is typically a networking issue when running via Docker. HotROD uses the OpenTelemetry exporter pointing to localhost:4318 by default, but inside a container, localhost doesn't resolve to the Jaeger container.

Recommended solution: Use the official Docker Compose setup:

JAEGER_VERSION=2.14.0 docker compose -f docker-compose.yml up

This properly configures the OTEL_EXPORTER_OTLP_ENDPOINT to point to http://jaeger:4318.

If you're running the containers manually, make sure to:

1. Include the all subcommand when starting HotROD (it's required to start all services)
2. Set OTEL_EXPORTER_OTLP_ENDPOINT=http://jaeger:4318 (or the correct Jaeger hostname)
3. Ensure Jaeger's OTLP receiver is binding to 0.0.0.0:4318 (not just 127.0.0.1)

Could you share how you're starting the HotROD and Jaeger containers? That would help identify the specific configuration issue.

To reply, just mention @dosu.

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[zhuyifeiRuichuang]

I try JAEGER_VERSION=2.7.0 docker compose up ,but the button is unresponsive.

[dosubot[bot]]

Can you check your browser's developer console (F12 → Console tab) for any JavaScript errors when you click a button? The HotROD buttons use jQuery to make API calls to /config and /dispatch endpoints.

Also check the Network tab in developer tools - when you click a button, you should see requests being made. If there are no network requests at all, it could be a JavaScript loading issue.

If you see network requests failing, that points to a backend configuration issue rather than the UI being broken.

To reply, just mention @dosu.

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[zhuyifeiRuichuang]

When i click button ,no new infomation in the network controller

[zhuyifeiRuichuang]

In the document https://github.com/jaegertracing/jaeger/tree/v2.16.0/cmd/jaeger, i try JAEGER_VERSION=2.0.0 HOTROD_VERSION=1.63.0 docker compose -f docker-compose.yml up is succesed