Azure App Configuration Not Compatible with Azure App Insights

[jyotijauhari]

We are using azure app configuration and azure app insight library in reactive springboot project with kotlin. We are using latest version of both libraries

Dependencies: implementation("com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0") implementation("com.microsoft.azure:applicationinsights-runtime-attach:3.5.2" ) implementation("com.microsoft.azure:applicationinsights-core:3.5.2")

When we are starting the application we are getting following error:

--

2024-05-31T11:45:32.939+05:30 ERROR 24280 --- [delegation-bff] [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webHandler' defined in class path resource [org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfiguration$EnableWebFluxConfiguration.class]: Error creating bean with name 'healthEndpointWebFluxHandlerMapping' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointReactiveWebExtensionConfiguration$WebFluxAdditionalHealthEndpointPathsConfiguration.class]: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.reactive.AdditionalHealthEndpointPathsWebFluxHandlerMapping]: Factory method 'healthEndpointWebFluxHandlerMapping' threw exception with message: Error creating bean with name 'metricsEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/MetricsEndpointAutoConfiguration.class]: Unsatisfied dependency expressed through method 'metricsEndpoint' parameter 0: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: io/opentelemetry/javaagent/instrumentation/micrometer/ai/AzureMonitorMeterRegistry
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:607) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) ~[spring-beans-6.1.6.jar:6.1.6]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962) ~[spring-context-6.1.6.jar:6.1.6]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) ~[spring-context-6.1.6.jar:6.1.6]
    at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) ~[spring-boot-3.2.5.jar:3.2.5]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.5.jar:3.2.5]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.5.jar:3.2.5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) ~[spring-boot-3.2.5.jar:3.2.5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-3.2.5.jar:3.2.5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-3.2.5.jar:3.2.5]
    at it.aidexa.delegation.DelegationApplicationKt.main(DelegationApplication.kt:16) ~[main/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'healthEndpointWebFluxHandlerMapping' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointReactiveWebExtensionConfiguration$WebFluxAdditionalHealthEndpointPathsConfiguration.class]: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.reactive.AdditionalHealthEndpointPathsWebFluxHandlerMapping]: Factory method 'healthEndpointWebFluxHandlerMapping' threw exception with message: Error creating bean with name 'metricsEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/MetricsEndpointAutoConfiguration.class]: Unsatisfied dependency expressed through method 'metricsEndpoint' parameter 0: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: io/opentelemetry/javaagent/instrumentation/micrometer/ai/AzureMonitorMeterRegistry

--

Application works perfectly fine when we remove either of library. I.e Scenarios:

1. With only implementation("com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0") -> WORKS without error
2. With only implementation("com.microsoft.azure:applicationinsights-runtime-attach:3.5.2" ) -> WORKS without error
3. With both implementation("com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0") and implementation("com.microsoft.azure:applicationinsights-runtime-attach:3.5.2" ) -> ERROR

Tried to search online, but couldn't find any solution.

[mrm9084]

@jyotijauhari we've had this setup before, it should work. My assumption is that you are loading a configuration through App Configuration that is triggering a bean to be created that isn't with your non appconfiguration setup, or you are missing a configuration. It's hard to say with the part of the stack trace you provided.

Looking at the bit you did it ends with:

Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: io/opentelemetry/javaagent/instrumentation/micrometer/ai/AzureMonitorMeterRegistry

There should be an exception below the one you provided with why the simpleMeterRegistry failed to be created.

Note: if you have a property in a local config file and the same in app configuration, the one in App Configuration takes priority, which might also cause a possible issue.

[jyotijauhari]

Hi @mrm9084 , I think local config might not be a problem, because when i am just using app configuration library [ implementation("com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0") ] without this two [ implementation("com.microsoft.azure:applicationinsights-runtime-attach:3.5.2", implementation("com.microsoft.azure:applicationinsights-core:3.5.2")]

The application is working without throwing any exception.

[mrm9084]

@jyotijauhari, the existence of a new Bean or new property that doesn't exist is triggering other beans to be created, and then failed to load.

The very bottom of the stack trace should say what the reason is, if you provided it, I could be of more help. I've been unable to replicate the issue with just those dependencies.

[zhenlan]

@mrm9084 is there anything else we need to address? Can this issue be closed?

[jyotijauhari]

I am currently working on replicating the issue again, as we have completely removed the old code along with the app configuration dependency. I need some time to recreate the scenario and gather detailed logs to share with you.

[jyotijauhari]

Hi @mrm9084, I created a new app from scratch and this is detailed logs and information

libraries used:

implementation(
        "com.microsoft.azure:applicationinsights-core:3.5.3"
    )
    implementation(
        "com.microsoft.azure:applicationinsights-runtime-attach:3.5.2"
    )
    implementation("com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0")

Configuration file:

@ConfigurationProperties(prefix = "config")
data class GlobalConfiguration(
    var message: String?,
    var consumer: String?
)

App insight configuration bean file ( as we want to read app insight connection string from app config)

@Configuration
class ApplicationInsightsConfig {
    @Bean
    fun attachApplicationInsights(): Boolean {
        ApplicationInsights.attach()
        ConnectionString.configure("<hardcoded-connectionstring-for-testing>")//in future will read from globalconfiguration
        return true
    }
}

controller for testing:

@RestController
@RequestMapping("/app-config")
class AppConfigController {
    @Autowired private lateinit var globalConfiguration: GlobalConfiguration

    @GetMapping
    suspend fun startOnboarding(): String {
        logger.info("test app configuration")
        logger.info(globalConfiguration.toString())
        return globalConfiguration.consumer ?: "Not found"
    }

        companion object {
        private val logger = LoggerFactory.getLogger(this::class.java)
    }

    }

Whenever we are starting the application and hit the endpoint , we are getting following logs:

2024-07-09T10:23:09.522+05:30 ERROR 64782 --- [app-config-test] [ctor-http-nio-3] reactor.netty.http.server.HttpServer     : [cfc9c940-1, L:/127.0.0.1:8080 - R:/127.0.0.1:54473] 

java.lang.NoClassDefFoundError: io/opentelemetry/javaagent/instrumentation/kotlinxcoroutines/KotlinCoroutinesInstrumentationHelper
    at kotlinx.coroutines.CoroutineContextKt.newCoroutineContext(CoroutineContext.kt:19) ~[kotlinx-coroutines-core-jvm-1.7.3.jar:na]
    at kotlinx.coroutines.reactor.MonoKt.monoInternal$lambda$2(Mono.kt:89) ~[kotlinx-coroutines-reactor-1.7.3.jar:na]
    at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:200) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:294) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:188) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:158) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:297) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:478) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2571) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.request(MonoPeekTerminal.java:139) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:470) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onSubscribe(MonoPeekTerminal.java:152) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:55) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip$ZipCoordinator.request(MonoZip.java:220) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.request(MonoFlatMap.java:194) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onSubscribe(MonoIgnoreThen.java:135) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:117) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:129) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:241) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:204) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:189) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators.complete(Operators.java:137) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:121) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4568) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:265) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:74) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.innerNext(FluxConcatMapNoPrefetch.java:259) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:865) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2571) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.request(MonoPeekTerminal.java:139) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:171) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.request(Operators.java:2331) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.request(FluxConcatMapNoPrefetch.java:339) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoNext$NextSubscriber.request(MonoNext.java:108) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2367) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2241) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoNext$NextSubscriber.onSubscribe(MonoNext.java:70) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onSubscribe(FluxConcatMapNoPrefetch.java:164) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:201) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:83) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4568) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:265) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55) ~[reactor-core-3.6.5.jar:3.6.5]
    at reactor.netty.http.server.HttpServer$HttpServerHandle.onStateChange(HttpServer.java:1176) ~[reactor-netty-http-1.1.18.jar:1.1.18]
    at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:710) ~[reactor-netty-core-1.1.18.jar:1.1.18]
    at reactor.netty.transport.ServerTransport$ChildObserver.onStateChange(ServerTransport.java:481) ~[reactor-netty-core-1.1.18.jar:1.1.18]
    at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:652) ~[reactor-netty-http-1.1.18.jar:1.1.18]
    at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:114) ~[reactor-netty-core-1.1.18.jar:1.1.18]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:240) ~[reactor-netty-http-1.1.18.jar:1.1.18]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.109.Final.jar:4.1.109.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.109.Final.jar:4.1.109.Final]
    at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
Caused by: java.lang.ClassNotFoundException: io.opentelemetry.javaagent.instrumentation.kotlinxcoroutines.KotlinCoroutinesInstrumentationHelper
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[na:na]

Note: We are using reactive spring boot application using spring webflux library. Whenever we are using com.microsoft.azure:applicationinsights-core:3.5.3 and com.azure.spring:spring-cloud-azure-appconfiguration-config:5.12.0 together, we get that error. If we remove either of this 2 library it works fine.

[mrm9084]

@jyotijauhari, this seems to be an issue when using the library with Kotlin. I'm not familiar with it myself but it seems the coroutine is the issue. If you remove the suspend int seems to work fine. Are you missing some dependency to make that work?

[jyotijauhari]

Hi thanks @mrm9084 , I tried searching online with different libraries and found that opentelemetry-java library was needed and I have added this additional library implementation("io.opentelemetry:opentelemetry-extension-kotlin") and it got fixed. Thanks for helping. I will close the issue.