Telemetry in runtime with node app emits a warning which show as an error in logs.

[marcopiraccini]

To reproduce add telemetry to a runtime with a node service. Will start correctly, but emitting this warning which appears in the log as error (because is sent to stderr)

[19:53:38.774] ERROR (express:0/2056772) <STDERR>: (node:2056772) ExperimentalWarning: `--experimental-loader` may be removed in the future; instead use `register()`:
--import 'data:text/javascript,import { register } from "node:module"; import { pathToFileURL } from "node:url"; register("%40opentelemetry/instrumentation/hook.mjs", pathToFileURL("./"));'
(Use `node --trace-warnings ...` to show where the warning was created)

This happens because: https://github.com/platformatic/platformatic/blob/main/packages/runtime/lib/runtime.js#L1074 Which is necesary because of: https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/esm-support.md#instrumentation-hook-required-for-esm

A solution could be to catch the event emitted on the process and log them correctly as warning. Or hide it, since the user cannot really do anything about that, and it's expected.

[Qard]

We could also just create our own wrapper around that to use --import instead, since we're not supporting old versions. See: https://github.com/open-telemetry/opentelemetry-js/issues/4933

[marcopiraccini]

This is not actual anymore after the otel upgrades, closing.