Understanding and Handling "Transient error StatusCode.UNAVAILABLE" When Exporting Traces

Last updated: December 13, 2024

When exporting traces, you may encounter a "Transient error StatusCode.UNAVAILABLE" message. This article explains what this error means and how to handle it.

What does this error mean?

The error message typically looks like this:

opentelemetry.exporter.otlp.proto.grpc.exporter: Transient error StatusCode.UNAVAILABLE encountered while exporting traces to <http://ingress.example.com:443|ingress.example.com:443>, retrying in 1s.

This error indicates a temporary issue in connecting to the external platform's ingestion endpoint. It's often caused by network instability or temporary unavailability of the external service.

Should I be concerned?

In most cases, you don't need to worry about this error. The OpenTelemetry exporter has a built-in retry mechanism that will attempt to resend the data after a short delay (as indicated by "retrying in 1s" in the error message).

How can I minimize these errors?

To reduce the occurrence of these errors and improve the reliability of your trace exports, consider implementing an OpenTelemetry Collector. The collector acts as a buffer between your application and the external platform, handling retries and providing additional resilience.

Steps to implement an OpenTelemetry Collector:

  1. Set up an OpenTelemetry Collector in your infrastructure.

  2. Configure your application to send traces to the collector instead of directly to the external platform.

  3. Configure the collector to forward the traces to your external platform (e.g., Coralogix).

By using a collector, you can offload the responsibility of handling network issues and retries from your application, potentially reducing the visibility of these transient errors in your application logs.

Conclusion

While "Transient error StatusCode.UNAVAILABLE" messages can be concerning, they are generally handled automatically by the OpenTelemetry exporter. For a more robust setup, consider implementing an OpenTelemetry Collector to manage trace exports more efficiently.