Getting class not found when using opentelemetry-javaagent-1.31.0.jar with my app which post some data to kafka topic

[88vishnu]

Caused by: org.apache.kafka.common.KafkaException: Failed to construct kafka producer at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:439) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:290) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:317) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:302) at com.ericsson.bss.msg.client.api.impl.MsgProducer.(MsgProducer.java:80) at com.ericsson.bss.msg.client.api.internal.impl.MsgProducerImpl.createProducer(MsgProducerImpl.java:357) at com.ericsson.bss.msg.client.api.internal.impl.MsgProducerImpl.checkIfProducerInitialized(MsgProducerImpl.java:279) at com.ericsson.bss.msg.client.api.internal.impl.MsgProducerImpl.sendMessage(MsgProducerImpl.java:291) at com.ericsson.bss.msg.client.api.internal.impl.MsgProducerImpl.sendSync(MsgProducerImpl.java:124) ... 78 more Caused by: org.apache.kafka.common.KafkaException: Class io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:396) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:478) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:459) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:350) ... 86 more Caused by: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter at org.ops4j.pax.web.service.spi.servlet.OsgiServletContextClassLoader.loadClass(OsgiServletContextClassLoader.java:128) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:398) at org.apache.kafka.common.utils.Utils.loadClass(Utils.java:417) at org.apache.kafka.common.utils.Utils.newInstance(Utils.java:406) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:394) ... 89 more Suppressed: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found by org.apache.aries.jax.rs.whiteboard_2.0.2 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:541) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:536) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) at org.ops4j.pax.web.service.spi.servlet.OsgiServletContextClassLoader.loadClass(OsgiServletContextClassLoader.java:121) ... 94 more Suppressed: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found by org.ops4j.pax.web.pax-web-jetty_8.0.15 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:541) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:536) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) at org.ops4j.pax.web.service.spi.servlet.OsgiServletContextClassLoader.loadClass(OsgiServletContextClassLoader.java:121) ... 94 more Suppressed: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found by org.ops4j.pax.web.pax-web-jsp_8.0.15 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:541) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:536) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) at org.ops4j.pax.web.service.spi.servlet.OsgiServletContextClassLoader.loadClass(OsgiServletContextClassLoader.java:121) ... 94 more

[88vishnu]

I explored the ot-javaagent jar and all other jar https://opentelemetry.io/blog/2022/instrument-kafka-clients/ defined in this link but the class with package io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter is not found.

[88vishnu]

Thanks, now this exception has gone, Yo

[88vishnu]

@laurit could you please share the link where all these configurations are defined.
As I do not found above info in this link https://opentelemetry.io/blog/2022/instrument-kafka-clients/

[almogtavor]

Isn’t there a better solution other than turning kafka’s metrics down? Seems pretty weird. In my case it happens but I do want the metrics

[laurit]

Isn’t there a better solution other than turning kafka’s metrics down? Seems pretty weird. In my case it happens but I do want the metrics

If this is an issue that you feel passionate about you are welcome to give a try at fixing it. As far as I understand the problem is in

opentelemetry-java-instrumentation/instrumentation/kafka/kafka-clients/kafka-clients-0.11/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/kafkaclients/v0_11/metrics/KafkaMetricsUtil.java

Lines 35 to 52 in 88ac0fd

	config.merge(
	CommonClientConfigs.METRIC_REPORTER_CLASSES_CONFIG,
	OpenTelemetryMetricsReporter.class.getName(),
	(class1, class2) -> {
	// class1 is either a class name or List of class names or classes
	if (class1 instanceof List) {
	List<Object> result = new ArrayList<>();
	result.addAll((List<Object>) class1);
	result.add(class2);
	return result;
	} else if (class1 instanceof String) {
	String className1 = (String) class1;
	if (className1.isEmpty()) {
	return class2;
	}
	}
	return class1 + "," + class2;
	});

It can probably be resolved by instead of OpenTelemetryMetricsReporter.class.getName() using Collections.singletonList(OpenTelemetryMetricsReporter.class) and adjusting the merge logic accordingly. Hopefully all supported versions of kafka accept a list of classes otherwise a different strategy might be needed. Alternatively it can probably fixed by moving OpenTelemetryMetricsReporter to a package with carefully chosen name so that osgi class loaders could find it.

[SanyaSingh-Groww]

I am getting this issue , intermittent. Does anyone what can be the exact cause ?
org.apache.kafka.common.KafkaException: org.apache.kafka.common.KafkaException: Failed to construct kafka producer at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:562) at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:591) at java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:689) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:159) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at com.elements.payoutsiciciservice.reverseflow.ReverseFlowTxnUtil.updateTxn(ReverseFlowTxnUtil.java:101) at com.elements.payoutsiciciservice.listner.SftpReverseFlowListner.listen(SftpReverseFlowListner.java:71) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:169) at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:119) at org.springframework.kafka.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:56) at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:366) at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:92) at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:53) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeOnMessage(KafkaMessageListenerContainer.java:2924) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeOnMessage(KafkaMessageListenerContainer.java:2904) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.lambda$doInvokeRecordListener$58(KafkaMessageListenerContainer.java:2822) at io.micrometer.observation.Observation.lambda$observe$4(Observation.java:544) at io.micrometer.observation.Observation.observeWithContext(Observation.java:603) at io.micrometer.observation.Observation.observe(Observation.java:544) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:2820) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:2672) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:2558) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:2200) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeIfHaveRecords(KafkaMessageListenerContainer.java:1555) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1519) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:1394) at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) at java.base/java.lang.Thread.run(Thread.java:833) Caused by: org.apache.kafka.common.KafkaException: Failed to construct kafka producer at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:465) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:290) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createRawProducer(DefaultKafkaProducerFactory.java:884) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createKafkaProducer(DefaultKafkaProducerFactory.java:777) at org.springframework.kafka.core.DefaultKafkaProducerFactory.doCreateProducer(DefaultKafkaProducerFactory.java:747) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createProducer(DefaultKafkaProducerFactory.java:727) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createProducer(DefaultKafkaProducerFactory.java:721) at org.springframework.kafka.core.KafkaTemplate.getTheProducer(KafkaTemplate.java:918) at org.springframework.kafka.core.KafkaTemplate.doSend(KafkaTemplate.java:772) at org.springframework.kafka.core.KafkaTemplate.observeSend(KafkaTemplate.java:754) at org.springframework.kafka.core.KafkaTemplate.send(KafkaTemplate.java:544) at com.elements.payoutsiciciservice.reverseflow.ReverseFlowTxnUtil.lambda$updateTxn$1(ReverseFlowTxnUtil.java:146) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:290) at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:754) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) Caused by: org.apache.kafka.common.KafkaException: Class io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:398) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:480) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:461) at org.apache.kafka.clients.CommonClientConfigs.metricsReporters(CommonClientConfigs.java:237) at org.apache.kafka.clients.CommonClientConfigs.metricsReporters(CommonClientConfigs.java:233) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:367) ... 21 common frames omitted Caused by: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:467) at org.apache.kafka.common.utils.Utils.loadClass(Utils.java:422) at org.apache.kafka.common.utils.Utils.newInstance(Utils.java:411) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:396) ... 26 common frames omitted

[SanyaSingh-Groww]

Does any one able to resolve this issue, I am getting this exception intermittent

org.apache.kafka.common.KafkaException: org.apache.kafka.common.KafkaException: Failed to construct kafka producer at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:562) at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:591) at java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:689) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:159) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at com.elements.payoutsiciciservice.reverseflow.ReverseFlowTxnUtil.updateTxn(ReverseFlowTxnUtil.java:101) at com.elements.payoutsiciciservice.listner.SftpReverseFlowListner.listen(SftpReverseFlowListner.java:71) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:169) at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:119) at org.springframework.kafka.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:56) at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:366) at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:92) at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:53) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeOnMessage(KafkaMessageListenerContainer.java:2924) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeOnMessage(KafkaMessageListenerContainer.java:2904) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.lambda$doInvokeRecordListener$58(KafkaMessageListenerContainer.java:2822) at io.micrometer.observation.Observation.lambda$observe$4(Observation.java:544) at io.micrometer.observation.Observation.observeWithContext(Observation.java:603) at io.micrometer.observation.Observation.observe(Observation.java:544) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:2820) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:2672) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:2558) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:2200) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeIfHaveRecords(KafkaMessageListenerContainer.java:1555) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1519) at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:1394) at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) at java.base/java.lang.Thread.run(Thread.java:833) Caused by: org.apache.kafka.common.KafkaException: Failed to construct kafka producer at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:465) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:290) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createRawProducer(DefaultKafkaProducerFactory.java:884) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createKafkaProducer(DefaultKafkaProducerFactory.java:777) at org.springframework.kafka.core.DefaultKafkaProducerFactory.doCreateProducer(DefaultKafkaProducerFactory.java:747) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createProducer(DefaultKafkaProducerFactory.java:727) at org.springframework.kafka.core.DefaultKafkaProducerFactory.createProducer(DefaultKafkaProducerFactory.java:721) at org.springframework.kafka.core.KafkaTemplate.getTheProducer(KafkaTemplate.java:918) at org.springframework.kafka.core.KafkaTemplate.doSend(KafkaTemplate.java:772) at org.springframework.kafka.core.KafkaTemplate.observeSend(KafkaTemplate.java:754) at org.springframework.kafka.core.KafkaTemplate.send(KafkaTemplate.java:544) at com.elements.payoutsiciciservice.reverseflow.ReverseFlowTxnUtil.lambda$updateTxn$1(ReverseFlowTxnUtil.java:146) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:290) at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:754) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) Caused by: org.apache.kafka.common.KafkaException: Class io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter cannot be found at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:398) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:480) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:461) at org.apache.kafka.clients.CommonClientConfigs.metricsReporters(CommonClientConfigs.java:237) at org.apache.kafka.clients.CommonClientConfigs.metricsReporters(CommonClientConfigs.java:233) at org.apache.kafka.clients.producer.KafkaProducer.(KafkaProducer.java:367) ... 21 common frames omitted Caused by: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.shaded.instrumentation.kafka.internal.OpenTelemetryMetricsReporter at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:467) at org.apache.kafka.common.utils.Utils.loadClass(Utils.java:422) at org.apache.kafka.common.utils.Utils.newInstance(Utils.java:411) at org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:396) ... 26 common frames omitted

[laurit]

Hopefully fixed in https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/tag/v2.2.0