otel.javaagent.logging=application causes warning log

[maxxedev]

Describe the bug

When running a spring-boot app with javaagent and otel.javaagent.logging=application system property set, then the following warning is logged:

WARN - ApplicationLoggerBridge - Multiple application logger implementations were provided. \
The javaagent will use the first bridge provided and ignore the following ones (this one).

It appears that javaagent initializes logging system, and then spring-boot re-initializes when it starts up. The second initialization triggers above warning message.

Possible (un)related is the following log:

WARN in Logger[io.opentelemetry.javaagent.instrumentation.executors.ExecutorMatchers] - \
No appenders present in context [default] for logger [io.opentelemetry.javaagent.instrumentation.executors.ExecutorMatchers].

Unlike ApplicationLoggerBridge log, ExecutorMatchers does not honor the logging config set by application.

Steps to reproduce

run a simple spring-boot app with ...
set -javaagent:opentelemetry-javaagent.jar
set -Dotel.javaagent.logging=application

Expected behavior

no warning message from javaagent

Actual behavior

warning message from javaagent

Javaagent or library instrumentation version

2.20.1

Environment

JDK:
OS:

Additional context

No response

Tip

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[maxxedev]

Stacktrace for Multiple application logger implementations were provided warning:

at io.opentelemetry.javaagent.instrumentation.internal.logging.Slf4jApplicationLoggerBridge$Slf4jApplicationLogger.log(Slf4jApplicationLoggerBridge.java:57)
at io.opentelemetry.javaagent.logging.application.ApplicationLoggerFactory.install(ApplicationLoggerFactory.java:34)
at io.opentelemetry.javaagent.bootstrap.logging.ApplicationLoggerBridge.installApplicationLogger(ApplicationLoggerBridge.java:31)
at io.opentelemetry.javaagent.instrumentation.internal.logging.Slf4jApplicationLoggerBridge.install(Slf4jApplicationLoggerBridge.java:17)
at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:301)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:246)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:223)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
at java.base/java.util.ImmutableCollections$List12.forEach(ImmutableCollections.java:681)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)

Stacktrace for No appenders present warning:

at ch.qos.logback.core.status.WarnStatus.<init>(WarnStatus.java:19)
at ch.qos.logback.classic.LoggerContext.noAppenderDefinedWarning(LoggerContext.java:201)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:266)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:426)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:386)
at ch.qos.logback.classic.Logger.debug(Logger.java:503)
at io.opentelemetry.javaagent.instrumentation.internal.logging.Slf4jApplicationLoggerBridge$Slf4jApplicationLogger.log(Slf4jApplicationLoggerBridge.java:63)
at io.opentelemetry.javaagent.logging.application.ApplicationLogger.log(ApplicationLogger.java:38)
at io.opentelemetry.javaagent.bootstrap.PatchLogger.log(PatchLogger.java:143)
at io.opentelemetry.javaagent.tooling.TransformSafeLogger.log(TransformSafeLogger.java:77)
at io.opentelemetry.javaagent.tooling.AgentInstaller$TransformLoggingListener.onTransformation(AgentInstaller.java:444)
at net.bytebuddy.agent.builder.AgentBuilder$Listener$Compound.onTransformation(AgentBuilder.java:2436)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.doTransform(AgentBuilder.java:12765)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:12698)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.access$1800(AgentBuilder.java:12407)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$Java9CapableVmDispatcher.run(AgentBuilder.java:13189)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$Java9CapableVmDispatcher.run(AgentBuilder.java:13119)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:138)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.doPrivileged(AgentBuilder.java)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:12641)
at net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$ByteBuddy$ModuleSupport.transform(Unknown Source)
at io.opentelemetry.javaagent.tooling.Java9LambdaTransformer.transform(Java9LambdaTransformer.java:28)
at io.opentelemetry.javaagent.instrumentation.internal.lambda.LambdaTransformerHelper.transform(LambdaTransformerHelper.java:33)
at java.base/java.lang.invoke.InnerClassLambdaMetafactory.generateInnerClass(InnerClassLambdaMetafactory.java:310)
at java.base/java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:282)
at java.base/java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:214)
at java.base/java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:354)
at java.base/java.lang.invoke.BootstrapMethodInvoker.invoke(BootstrapMethodInvoker.java:134)
at java.base/java.lang.invoke.CallSite.makeSite(CallSite.java:310)
at java.base/java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:250)
at java.base/java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:240)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:252)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.reinitialize(LogbackLoggingSystem.java:342)
at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:74)
at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:61)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:195)
at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:332)
at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:298)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:246)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:223)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
at java.base/java.util.ImmutableCollections$List12.forEach(ImmutableCollections.java:681)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)