Error: "Failed to export spans" when running with default config

[dimas-b]

• Run local Nessie (e.g. Quarkus dev mode).
• Make some requests
• Quarkus logs this error:

2022-12-07 19:41:06,633 SEVERE [io.ope.exp.int.grp.OkHttpGrpcExporter] (OkHttp http://localhost:4317/...) Failed to export spans. 
The request could not be executed. Full error message: Failed to connect to localhost/127.0.0.1:4317

[snazy]

Haven't seen this one anymore, closing

[adutra]

Just for future reference: this error message is still visible and is related to the quarkus.opentelemetry.tracer.exporter.otlp.endpoint setting.

This setting is mandatory for OpenTelemetry to work properly and should always be explicitly set in production mode.

In development mode (quarkus:dev), however, thanks to the specific behavior in OtlpRecorder, this setting is automatically set to http://localhost:4317 if not present.

Because of that, the LateBoundBatchSpanProcessor bean gets configured, and tries to contact the OTLP collector at http://localhost:4317 but fails since no collector was deployed – hence the error message.

In #6153 I added a few troubleshooting notes about this to site/docs/try/configuration.md, see 1e491aa.