Quarkus LGTM for multiple services

[BrianSetz]

Describe the bug

When running multiple services in dev mode, the services can see that LGTM is already running and re-use it:

Service A (starts first, starts LGTM stack)

13:35:52 INFO traceId=, parentId=, spanId=, sampled= [io.qu.ob.de.ObservabilityDevServiceProcessor] (build-52) Dev Service Lgtm started, config: {grafana.endpoint=http://localhost:32845, quarkus.otel.exporter.otlp.endpoint=http://localhost:32843, otel-collector.url=localhost:32843, quarkus.otel.exporter.otlp.protocol=http/protobuf}

Service B (start second, find existing LGTM stack)

13:45:08 INFO traceId=, parentId=, spanId=, sampled= [io.qu.ob.de.ObservabilityDevServiceProcessor] (build-41) Dev Service Lgtm re-used, config: {grafana.endpoint=http://localhost:32845, otel-collector.url=localhost:32843}

But, only the first service (Service A) is configured correctly:

Service B is not:

Resulting in Service B reporting:

13:45:45 WARNING traceId=, parentId=, spanId=, sampled= [io.qu.op.ru.ex.ot.se.VertxGrpcSender] (vert.x-eventloop-thread-5) Failed to export TraceRequestMarshalers. The request could not be executed. Full error message: Connection refused: localhost/127.0.0.1:4317

Which makes sense, sort of, since the collector is running on port 32843, and not 4317.

Looking at the logs, the config for Service A is set to config: {grafana.endpoint=http://localhost:32845, quarkus.otel.exporter.otlp.endpoint=http://localhost:32843, otel-collector.url=localhost:32843, quarkus.otel.exporter.otlp.protocol=http/protobuf} where as Service B only receives config: {grafana.endpoint=http://localhost:32845, otel-collector.url=localhost:32843} which isn't all the options it needs?

Expected behavior

Running two services in dev mode while using LGTM should allow both services to discover the LGTM stack and connect to the correct ports.

Actual behavior

Only the first service connects to the right ports, all other services do not discover the ports correctly.

How to Reproduce?

Reproducer:

1. Start one LGTM-enabled service
2. Start another LGTM-enabled service
3. Open dev UI and inspect configuration, e.g. look at quarkus.otel.exporter.otlp.endpoint

Output of uname -a or ver

Linux p15v 6.8.0-52-generic #53-Ubuntu SMP PREEMPT_DYNAMIC Sat Jan 11 00:06:25 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Output of java -version

OpenJDK 21

Quarkus version or git rev

3.18.2

Build tool (ie. output of mvnw --version or gradlew --version)

Gradle 8.12.1

Additional information

No response

[quarkus-bot]

/cc @brunobat (micrometer), @ebullient (metrics,micrometer), @jmartisk (metrics)