Disabling OpenTelemetry Tracing while keeping OTLP Log and Metrics export

[Ultranium]

Is it possible to turn off OpenTelemetry Tracing subsystem completely but keep active OTel metrics and logging?

Some of my projects don't really need tracing, but centralized log and metrics acquisition via OpenTelemetry is handy.
I have already set the OTel-related properties quarkus.otel.traces.sampler=always_off and quarkus.otel.traces.exporter=none, but my logs are still bloated with messages like:

2025-03-26 16:32:28,474 INFO  [io.qua.ope.run.QuarkusContextStorage] (vert.x-eventloop-thread-3) Context in storage not the expected context, Scope.close was not called correctly. Details: OTel context before: {spanId=6830ced1ece65b89, traceId=7af9b254c486a1f79b4cfc870fcefedd, sampled=false}. OTel context toAttach: {spanId=0add7e8d9776ec79, traceId=7af9b254c486a1f79b4cfc870fcefedd, sampled=false}

which tell me that tracing components are still active. I can easily suppress those messages by configuring logging, but it would be a better solution to disable the tracing itself what it's not needed, thus avoiding unnecessary use of machine resources.

Setting the property quarkus.otel.traces.enabled=false prevents Quarkus from starting due to the following error:

2025-03-26 17:35:01,524 ERROR [io.qua.run.Application] (Quarkus Main Thread) Failed to start application: java.lang.RuntimeException: Failed to start quarkus
        at io.quarkus.runner.ApplicationImpl.doStart(Unknown Source)
        at io.quarkus.runtime.Application.start(Application.java:101)
        at io.quarkus.runtime.ApplicationLifecycleManager.run(ApplicationLifecycleManager.java:121)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:77)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:48)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:137)
        at io.quarkus.runner.GeneratedMain.main(Unknown Source)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at io.quarkus.runner.bootstrap.StartupActionImpl$1.run(StartupActionImpl.java:116)
        at java.base/java.lang.Thread.run(Thread.java:1575)
Caused by: jakarta.enterprise.inject.CreationException: Error creating synthetic bean [Le6zQbzkojAYO_OiKIQWJf4lGa4]: jakarta.enterprise.inject.UnsatisfiedResolutionException: No bean found for required type [class io.quarkus.opentelemetry.runtime.tracing.DelayedAttributes] and qualifiers [[@jakarta.enterprise.inject.Any()]]
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.doCreate(Unknown Source)
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.create(Unknown Source)
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.create(Unknown Source)
        at io.quarkus.arc.impl.AbstractSharedContext.createInstanceHandle(AbstractSharedContext.java:119)
        at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:38)
        at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:35)
        at io.quarkus.arc.impl.LazyValue.get(LazyValue.java:32)
        at io.quarkus.arc.impl.ComputingCache.computeIfAbsent(ComputingCache.java:69)
        at io.quarkus.arc.impl.ComputingCacheContextInstances.computeIfAbsent(ComputingCacheContextInstances.java:19)
        at io.quarkus.arc.impl.AbstractSharedContext.get(AbstractSharedContext.java:35)
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.get(Unknown Source)
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.get(Unknown Source)
        at io.quarkus.arc.impl.InstanceImpl.getBeanInstance(InstanceImpl.java:325)
        at io.quarkus.arc.impl.InstanceImpl.getInternal(InstanceImpl.java:309)
        at io.quarkus.arc.impl.InstanceImpl.get(InstanceImpl.java:190)
        at io.quarkus.arc.runtime.BeanContainerImpl.beanInstance(BeanContainerImpl.java:28)
        at io.quarkus.opentelemetry.runtime.logs.OpenTelemetryLogRecorder.initializeHandler(OpenTelemetryLogRecorder.java:19)
        at io.quarkus.runner.recorded.LogHandlerProcessor$build1858103200.deploy_0(Unknown Source)
        at io.quarkus.runner.recorded.LogHandlerProcessor$build1858103200.deploy(Unknown Source)
        ... 11 more
Caused by: jakarta.enterprise.inject.UnsatisfiedResolutionException: No bean found for required type [class io.quarkus.opentelemetry.runtime.tracing.DelayedAttributes] and qualifiers [[@jakarta.enterprise.inject.Any()]]
        at io.quarkus.arc.impl.InstanceImpl.bean(InstanceImpl.java:288)
        at io.quarkus.arc.impl.InstanceImpl.getInternal(InstanceImpl.java:309)
        at io.quarkus.arc.impl.InstanceImpl.get(InstanceImpl.java:190)
        at io.quarkus.opentelemetry.runtime.AutoConfiguredOpenTelemetrySdkBuilderCustomizer$TracingResourceCustomizer$1.apply(AutoConfiguredOpenTelemetrySdkBuilderCustomizer.java:118)
        at io.quarkus.opentelemetry.runtime.AutoConfiguredOpenTelemetrySdkBuilderCustomizer$TracingResourceCustomizer$1.apply(AutoConfiguredOpenTelemetrySdkBuilderCustomizer.java:112)
        at io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdkBuilder.lambda$mergeCustomizer$13(AutoConfiguredOpenTelemetrySdkBuilder.java:653)
        at io.opentelemetry.sdk.autoconfigure.ResourceConfiguration.configureResource(ResourceConfiguration.java:117)
        at io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdkBuilder.build(AutoConfiguredOpenTelemetrySdkBuilder.java:441)
        at io.quarkus.opentelemetry.runtime.OpenTelemetryRecorder$1.apply(OpenTelemetryRecorder.java:87)
        at io.quarkus.opentelemetry.runtime.OpenTelemetryRecorder$1.apply(OpenTelemetryRecorder.java:60)
        at io.opentelemetry.api.OpenTelemetry_Le6zQbzkojAYO_OiKIQWJf4lGa4_Synthetic_Bean.createSynthetic(Unknown Source)
        ... 30 more

[quarkus-bot[bot]]

/cc @brunobat (opentelemetry), @ebullient (metrics), @jmartisk (metrics), @radcortez (opentelemetry)

[brunobat]

The exception when you set quarkus.otel.traces.enabled=false looks like a bug. Can you please file one?
You can disable all tracing instrumentation, therefore suppressing most span related processing by setting:

quarkus.otel.instrument.grpc=false
quarkus.otel.instrument.messaging=false
quarkus.otel.instrument.resteasy-client=false
quarkus.otel.instrument.resteasy-client=false
quarkus.otel.instrument.vertx-http=false
quarkus.otel.instrument.vertx-event-bus=false
quarkus.otel.instrument.vertx-sql-client=false
quarkus.otel.instrument.vertx-redis-client=false

You can ignore dependencies you don't use and other libraries outside quarkus core might have additional switches.

[Ultranium]

Thank you, disabling instrumentation seems to be working.
Also, I opened an issue: #47031