otel errors when installing another agent with relocated bytebuddy

[shalom938]

Hi,
I'm installing a java agent together with otel agent. my java agent packages bytebuddy and relocates it to org.digma.net.bytebuddy. my agent installs a bytebuddy transformer.

if otel debug is on i see a bunch of exception from otel agent, its all something like that:

Cannot resolve type description for org.digma.net.bytebuddy.agent.builder.$Proxy31
Cannot resolve type description for org.digma.net.bytebuddy.dynamic.loading.$Proxy30

it happens on startup , around 20-30 exceptions , then it stops and looks like everything and otel instrumentation is working fine,
can you help me if this is something to worry about or can i just ignore it ?

otel.javaagent 2024-05-10 23:54:28:858 +0300] [main] DEBUG io.opentelemetry.javaagent.tooling.bytebuddy.LoggingFailSafeMatcher - Instrumentation type matcher unexpected exception: AnnotationInstrumentationModule#WithSpanInstrumentation((not(name(startsWith(kotlin.coroutines.))) and declaresMethods(whereOne((declaresAnnotations(whereOne(ofAnnotationType(name(equals(io.opentelemetry.instrumentation.annotations.WithSpan))))) and returns(erasure(is(class java.lang.Object))) and io.opentelemetry.javaagent.instrumentation.instrumentationannotations.KotlinCoroutineUtil$$Lambda$218/0x000000080042f7b0@1a0b5323 and not(false))))))
net.bytebuddy.pool.TypePool$Resolution$NoSuchTypeException: Cannot resolve type description for org.digma.net.bytebuddy.agent.builder.$Proxy31
at net.bytebuddy.pool.TypePool$Resolution$Illegal.resolve(TypePool.java:190)
at io.opentelemetry.javaagent.tooling.muzzle.AgentCachingPoolStrategy$AgentTypePool$CachingTypeDescription.delegate(AgentCachingPoolStrategy.java:422)
at io.opentelemetry.javaagent.tooling.muzzle.AgentCachingPoolStrategy$AgentTypePool$CachingTypeDescription.getDeclaredMethods(AgentCachingPoolStrategy.java:450)
at io.opentelemetry.javaagent.tooling.muzzle.AgentCachingPoolStrategy$AgentTypePool$LazyTypeDescription.getDeclaredMethods(AgentCachingPoolStrategy.java:547)
at net.bytebuddy.matcher.DeclaringMethodMatcher.doMatch(DeclaringMethodMatcher.java:49)
at net.bytebuddy.matcher.DeclaringMethodMatcher.doMatch(DeclaringMethodMatcher.java:28)
at net.bytebuddy.matcher.ElementMatcher$Junction$ForNonNullValues.matches(ElementMatcher.java:249)
at net.bytebuddy.matcher.ElementMatcher$Junction$Conjunction.matches(ElementMatcher.java:146)
at io.opentelemetry.javaagent.tooling.util.IgnoreFailedTypeMatcher.matches(IgnoreFailedTypeMatcher.java:27)
at io.opentelemetry.javaagent.tooling.util.IgnoreFailedTypeMatcher.matches(IgnoreFailedTypeMatcher.java:18)
at io.opentelemetry.javaagent.tooling.util.NamedMatcher.matches(NamedMatcher.java:26)
at io.opentelemetry.javaagent.tooling.bytebuddy.LoggingFailSafeMatcher.matches(LoggingFailSafeMatcher.java:48)
at net.bytebuddy.agent.builder.AgentBuilder$RawMatcher$ForElementMatchers.matches(AgentBuilder.java:1973)
at net.bytebuddy.agent.builder.AgentBuilder$RawMatcher$Conjunction.matches(AgentBuilder.java:1808)
at net.bytebuddy.agent.builder.AgentBuilder$Default$Transformation$SimpleMatcher.matches(AgentBuilder.java:11952)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy$Collector.doConsider(AgentBuilder.java:8151)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy$Collector.consider(AgentBuilder.java:8096)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy.apply(AgentBuilder.java:5883)
at net.bytebuddy.agent.builder.AgentBuilder$Default.doInstall(AgentBuilder.java:11499)
at net.bytebuddy.agent.builder.AgentBuilder$Default.installOn(AgentBuilder.java:11399)
at io.opentelemetry.javaagent.tooling.AgentInstaller.installBytebuddyAgent(AgentInstaller.java:195)
at io.opentelemetry.javaagent.tooling.AgentInstaller.installBytebuddyAgent(AgentInstaller.java:103)
at io.opentelemetry.javaagent.tooling.AgentStarterImpl.start(AgentStarterImpl.java:99)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer$1.run(AgentInitializer.java:53)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer$1.run(AgentInitializer.java:47)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer.execute(AgentInitializer.java:64)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer.initialize(AgentInitializer.java:46)
at io.opentelemetry.javaagent.OpenTelemetryAgent.startAgent(OpenTelemetryAgent.java:57)
at io.opentelemetry.javaagent.OpenTelemetryAgent.premain(OpenTelemetryAgent.java:45)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:491)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:503)

[otel.javaagent 2024-05-10 23:54:29:249 +0300] [main] DEBUG io.opentelemetry.javaagent.tooling.AgentInstaller$TransformLoggingListener - Failed to handle org.digma.net.bytebuddy.description.type.$Proxy18 for transformation on class loader jdk.internal.loader.ClassLoaders$AppClassLoader@14899482
net.bytebuddy.pool.TypePool$Resolution$NoSuchTypeException: Cannot resolve type description for org.digma.net.bytebuddy.description.type.$Proxy18
at net.bytebuddy.pool.TypePool$Resolution$Illegal.resolve(TypePool.java:190)
at io.opentelemetry.javaagent.tooling.muzzle.AgentCachingPoolStrategy$AgentTypePool$CachingTypeDescription.delegate(AgentCachingPoolStrategy.java:422)
at net.bytebuddy.description.type.TypeDescription$AbstractBase$OfSimpleType$WithDelegation.getModifiers(TypeDescription.java:8535)
at net.bytebuddy.matcher.ModifierMatcher.doMatch(ModifierMatcher.java:60)
at net.bytebuddy.matcher.ModifierMatcher.doMatch(ModifierMatcher.java:27)
at net.bytebuddy.matcher.ElementMatcher$Junction$ForNonNullValues.matches(ElementMatcher.java:249)
at net.bytebuddy.matcher.NegatingMatcher.matches(NegatingMatcher.java:47)
at net.bytebuddy.matcher.ElementMatcher$Junction$Conjunction.matches(ElementMatcher.java:146)
at io.opentelemetry.javaagent.tooling.util.IgnoreFailedTypeMatcher.matches(IgnoreFailedTypeMatcher.java:27)
at io.opentelemetry.javaagent.tooling.util.IgnoreFailedTypeMatcher.matches(IgnoreFailedTypeMatcher.java:18)
at io.opentelemetry.javaagent.tooling.util.NamedMatcher.matches(NamedMatcher.java:26)
at net.bytebuddy.agent.builder.AgentBuilder$RawMatcher$ForElementMatchers.matches(AgentBuilder.java:1973)
at net.bytebuddy.agent.builder.AgentBuilder$RawMatcher$Conjunction.matches(AgentBuilder.java:1808)
at net.bytebuddy.agent.builder.AgentBuilder$Default$Transformation$SimpleMatcher.matches(AgentBuilder.java:11952)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy$Collector.doConsider(AgentBuilder.java:8151)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy$Collector.consider(AgentBuilder.java:8096)
at net.bytebuddy.agent.builder.AgentBuilder$RedefinitionStrategy.apply(AgentBuilder.java:5883)
at net.bytebuddy.agent.builder.AgentBuilder$Default.doInstall(AgentBuilder.java:11499)
at net.bytebuddy.agent.builder.AgentBuilder$Default.installOn(AgentBuilder.java:11399)
at io.opentelemetry.javaagent.tooling.AgentInstaller.installBytebuddyAgent(AgentInstaller.java:195)
at io.opentelemetry.javaagent.tooling.AgentInstaller.installBytebuddyAgent(AgentInstaller.java:103)
at io.opentelemetry.javaagent.tooling.AgentStarterImpl.start(AgentStarterImpl.java:99)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer$1.run(AgentInitializer.java:53)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer$1.run(AgentInitializer.java:47)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer.execute(AgentInitializer.java:64)
at io.opentelemetry.javaagent.bootstrap.AgentInitializer.initialize(AgentInitializer.java:46)
at io.opentelemetry.javaagent.OpenTelemetryAgent.startAgent(OpenTelemetryAgent.java:57)
at io.opentelemetry.javaagent.OpenTelemetryAgent.premain(OpenTelemetryAgent.java:45)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:491)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:503)

[laurit]

There are printed only at the debug level and can be ignored. Changing the order of the agents may also get rid of these.

[shalom938]

@laurit Thank you for your response.
I want my agent to install its transformer before otel agent so i will keep it that way and ignore those errors.