Class not found error with opentelemetry zipkin tracing enabled for MI-4.3.0

[gayaldassanayake]

Description

When trying to enable MI tracing with zipkin for MI-4.3.0, I get a ClassNotFoundException[1].

Note that this error is not available in 4.2.0. The missing class is from https://mvnrepository.com/artifact/io.zipkin.reporter2/zipkin-sender-okhttp3/2.17.2 jar. This is packed into the wso2-mi repo as an OSGI bundle via zipkin-sender-okhttp3:2.17.2-wso2v1. However since this is just an OSGI bundle actual classes are not packed here.

In wso2-mi:4.2.0, the actual jar is present in as wso2/components/plugins/io.zipkin.reporter2.zipkin-sender-okhttp3_2.16.3.jar. In 4.3.0 this jar has been removed for some reason.

[1]

Failed to initialize ESB due to a fatal error java.lang.NoClassDefFoundError: zipkin2/reporter/okhttp3/OkHttpSender
        at io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.builder(ZipkinSpanExporter.java:270)
        at org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management.ZipkinTelemetryManager.init(ZipkinTelemetryManager.java:58)
        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:380)
        at org.wso2.micro.integrator.initializer.ServiceBusInitializer.activate(ServiceBusInitializer.java:151)
        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.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: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.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 java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.ClassNotFoundException: zipkin2.reporter.okhttp3.OkHttpSender cannot be found by opentelemetry-all_1.11.0.wso2v6
        at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)
        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:520)
        ... 44 more

Steps to Reproduce

1. Download wso2-mi 4.3.0 and extract the zip
2. Run the relevant wso2update_ shell script within the bin/ directory (for macos, ./wso2update_darwin) to update the update tool
3. Run the same update tool again to get the latest dependency versions.
4. Add the following opentelemetry table to conf/deployment.toml.

   [opentelemetry]
   enable = true
   logs = true
   type = "zipkin"
   host = "localhost"
   port = 94

5. Start the server by running sh bin/micro-integrator.sh. You will get the above-mentioned error.

Version

4.3.0

Environment Details (with versions)

MacOS 13.3.1 (22E261)