java.lang.NoClassDefFoundError: okio/Buffer after update to patch level 82 when enable OpenTelemery

[DaniduWijendra]

When using open telemetry on the MI server, observe the following error after updating the MI server to update level 82.

FATAL {ServiceBusInitializer} - Failed to initialize ESB due to a fatal error java.lang.NoClassDefFoundError: okio/Buffer
	at okhttp3.ResponseBody$Companion.create(ResponseBody.kt:248)
	at okhttp3.ResponseBody$Companion.create$default(ResponseBody.kt:247)
	at okhttp3.internal.Util.<clinit>(Util.kt:65)
	at okhttp3.internal.concurrent.TaskRunner.<clinit>(TaskRunner.kt:309)
	at okhttp3.ConnectionPool.<init>(ConnectionPool.kt:41)
	at okhttp3.ConnectionPool.<init>(ConnectionPool.kt:47)
	at okhttp3.OkHttpClient$Builder.<init>(OkHttpClient.kt:471)
	at io.opentelemetry.exporter.internal.grpc.OkHttpGrpcExporterBuilder.build(OkHttpGrpcExporterBuilder.java:112)
	at io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporterBuilder.build(OtlpGrpcSpanExporterBuilder.java:144)
	at org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management.OTLPTelemetryManager.init(OTLPTelemetryManager.java:70)
	at org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.OpenTelemetryManagerHolder.loadTracerConfigurations(OpenTelemetryManagerHolder.java:52)
	at org.apache.synapse.aspects.flow.statistics.collectors.RuntimeStatisticCollector.init(RuntimeStatisticCollector.java:118)
	at org.apache.synapse.ServerManager.init(ServerManager.java:115)
	at org.wso2.micro.integrator.initializer.ServiceBusInitializer.initESB(ServiceBusInitializer.java:365)
	at org.wso2.micro.integrator.initializer.ServiceBusInitializer.activate(ServiceBusInitializer.java:155)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:235)
	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
	at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
	at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
	at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
	at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
	at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:113)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:985)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:234)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:866)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:804)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:228)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:525)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:544)
	at org.wso2.micro.integrator.ntask.core.internal.TasksDSComponent.activate(TasksDSComponent.java:147)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
	at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
	at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
	at org.eclipse.equinox.internal.ds.Resolver.buildNewlySatisfied(Resolver.java:473)
	at org.eclipse.equinox.internal.ds.Resolver.enableComponents(Resolver.java:217)
	at org.eclipse.equinox.internal.ds.SCRManager.performWork(SCRManager.java:816)
	at org.eclipse.equinox.internal.ds.SCRManager$QueuedJob.dispatch(SCRManager.java:783)
	at org.eclipse.equinox.internal.ds.WorkThread.run(WorkThread.java:89)
	at org.eclipse.equinox.internal.util.impl.tpt.threadpool.Executor.run(Executor.java:70)
Caused by: java.lang.ClassNotFoundException: okio.Buffer cannot be found by okhttp_4.9.3.wso2v2
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:512)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:423)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:415)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:155)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527)
	... 52 more

Reproducing Steps.

• Configure the MI server by enabling open telemetry according to the documentation [1].

Sample Config

[opentelemetry]
enable = true
logs = true
type = "otlp"
url = "<otlp_url>"


[[opentelemetry.properties]]
name = "Authorization"
value = "Bearer <token>"

• Then update the server to u2 level 82 and try to start the server.

[1] https://mi.docs.wso2.com/en/latest/observe-and-manage/classic-observability-traces/monitoring-with-opentelemetry-mi/#enabling-otlp-tracing

[arunans23]

Fixed in relevant versions.