NullPointerException being thrown in "com.newrelic.agent.Transaction.finishSegment"

[gillesbergerp]

Description

We experience NullPointerExceptions when using the coroutine extension with Java agent version 8.15.0. Removing the extension (but staying on the same agent version) does not result in the problem

Relevant Logs / Console output

java.lang.NullPointerException:
 Cannot invoke 
"com.newrelic.agent.Transaction.finishSegment(com.newrelic.agent.Segment,
 java.lang.Throwable, com.newrelic.agent.tracers.Tracer, String)" 
because the return value of 
"com.newrelic.agent.TransactionActivity.getTransaction()" is null
	at com.newrelic.agent.Segment$1.run(Segment.java:203)
	at 
com.newrelic.agent.ExpirationService.expireSegmentInline(ExpirationService.java:47)
	at com.newrelic.agent.Segment.finish(Segment.java:215)
	at com.newrelic.agent.Segment.end(Segment.java:144)
	at 
com.nr.agent.mongo.NRCallbackWrapper.onResult(NRCallbackWrapper.java:48)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.async.function.AsyncCallbackSupplier.lambda$whenComplete$1(AsyncCallbackSupplier.java:97)
	at 
com.mongodb.internal.async.function.RetryingAsyncCallbackSupplier$RetryingCallback.onResult(RetryingAsyncCallbackSupplier.java:116)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.async.function.AsyncCallbackSupplier.lambda$whenComplete$1(AsyncCallbackSupplier.java:97)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.async.function.AsyncCallbackSupplier.lambda$whenComplete$1(AsyncCallbackSupplier.java:97)
	at 
com.mongodb.internal.operation.FindOperation.lambda$exceptionTransformingCallback$6(FindOperation.java:369)
	at 
com.mongodb.internal.operation.AsyncOperationHelper.lambda$transformingReadCallback$19(AsyncOperationHelper.java:442)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.connection.LoadBalancedServer$LoadBalancedServerProtocolExecutor.lambda$executeAsync$0(LoadBalancedServer.java:186)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.connection.CommandProtocolImpl.lambda$executeAsync$0(CommandProtocolImpl.java:88)
	at 
com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection.lambda$sendAndReceiveAsync$1(DefaultConnectionPool.java:802)
	at 
com.mongodb.internal.connection.UsageTrackingInternalConnection.lambda$sendAndReceiveAsync$1(UsageTrackingInternalConnection.java:155)
	at 
com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:47)
	at 
com.mongodb.internal.connection.InternalStreamConnection.lambda$sendCommandMessageAsync$0(InternalStreamConnection.java:555)
	at 
com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback$MessageCallback.onResult(InternalStreamConnection.java:849)
	at 
com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback$MessageCallback.onResult(InternalStreamConnection.java:812)
	at 
com.mongodb.internal.connection.InternalStreamConnection$3.completed(InternalStreamConnection.java:671)
	at 
com.mongodb.internal.connection.InternalStreamConnection$3.completed(InternalStreamConnection.java:668)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:252)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:235)
	at java.base/sun.nio.ch.Invoker.invokeUnchecked(Unknown Source)
	at java.base/sun.nio.ch.Invoker.invokeDirect(Unknown Source)
	at 
java.base/sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(Unknown 
Source)
	at java.base/sun.nio.ch.AsynchronousSocketChannelImpl.read(Unknown 
Source)
	at java.base/sun.nio.ch.AsynchronousSocketChannelImpl.read(Unknown 
Source)
	at 
com.mongodb.internal.connection.AsynchronousSocketChannelStream$AsynchronousSocketChannelAdapter.read(AsynchronousSocketChannelStream.java:148)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream.readAsync(AsynchronousChannelStream.java:124)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream.readAsync(AsynchronousChannelStream.java:113)
	at 
com.mongodb.internal.connection.InternalStreamConnection.readAsync(InternalStreamConnection.java:668)
	at 
com.mongodb.internal.connection.InternalStreamConnection.access$600(InternalStreamConnection.java:98)
	at 
com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:802)
	at 
com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:786)
	at 
com.mongodb.internal.connection.InternalStreamConnection$3.completed(InternalStreamConnection.java:671)
	at 
com.mongodb.internal.connection.InternalStreamConnection$3.completed(InternalStreamConnection.java:668)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:252)
	at 
com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.comple<!--EndFragment-->

Your Environment

• NewRelic Java Agent 8.15.0
• JRE 17
• Kotlin 1.9.20

[dhilpipre]

We are working on this problem. it results from problems with the Java Agent and the Kotlin-Coroutines-Suspends.jar.
As a workaround, remove the Kotlin-Coroutines-Suspends.jar from the extensions directory and restart. This should eliminate the problem but will result in Suspend methods not being tracked.

All other extension are fine and do not cause problems.

[gillesbergerp]

Thanks for the fast reply. Is there an ETA for when a fix might be available?

[dhilpipre]

The problem seems to stem from a problem when the Java Agent retransforms some Kotlin classes. I can't give an ETA until I have been able to work with them on fixing that problem but indications are that it might be a while.

[gillesbergerp]

@dhilpipre, can you share an update on this issue?

[dhilpipre]

After a long investigation the Java Agent team was able to find the problem and fix it. This should eliminate the NullPointerExceptions.
Please use Release https://github.com/newrelic/newrelic-java-kotlin-coroutines/releases/tag/v1.0.7
and update the Java Agent to 8.19.0

[MT-Jacobs]

Should the above be 8.19.0 or 8.19.1 instead? There doesn't appear to be an 8.1.19, though note that 8.19.1 doesn't seem to be released yet either.

[dhilpipre]

sorry, typo. 8.19.0

[MT-Jacobs]

I'm still getting this behavior with 8.19.0 and the 1.0.7 extension.

For those with access to our company's New Relic space - https://onenr.io/0VwgLMdkORJ

Error message: "TransactionActivity is gone"

Stacktrace -

	com.newrelic.agent.Transaction.getTransactionActivity(Transaction.java:924)
	at 	com.newrelic.agent.Transaction.startSegment(Transaction.java:2316)
	at 	com.newrelic.agent.TransactionApiImpl.startSegment(TransactionApiImpl.java:476)
	at 	com.newrelic.agent.TransactionApiImpl.startSegment(TransactionApiImpl.java:456)
	at 	com.nr.lettuce6.instrumentation.NRHolder.startSegment(NRHolder.java:38)
	at 	com.nr.lettuce6.instrumentation.NRSubscribeConsumer.accept(NRSubscribeConsumer.java:24)
	at 	com.nr.lettuce6.instrumentation.NRSubscribeConsumer.accept(NRSubscribeConsumer.java:13)
	at 	reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onSubscribe(FluxPeekFuseable.java:807)
	at 	reactor.core.publisher.MonoNext$NextSubscriber.onSubscribe(MonoNext.java:70)
	at 	reactor.core.publisher.MonoNext$NextSubscriber.onSubscribe(MonoNext.java:70)
	at 	io.lettuce.core.RedisPublisher$State$1.subscribe(RedisPublisher.java:518)
	at 	io.lettuce.core.RedisPublisher$RedisSubscription.subscribe(RedisPublisher.java:231)
	at 	io.lettuce.core.RedisPublisher.subscribe(RedisPublisher.java:130)
	at 	reactor.core.publisher.MonoFromPublisher.subscribe(MonoFromPublisher.java:64)
	at 	reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
	at 	reactor.core.publisher.FluxRetry$RetrySubscriber.resubscribe(FluxRetry.java:120)
	at 	reactor.core.publisher.MonoRetry.subscribeOrReturn(MonoRetry.java:50)
	at 	reactor.core.publisher.Mono.subscribe(Mono.java:4552)
	at 	reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:430)
	at 	reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:335)
	at 	reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:294)
	at 	reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:373)
	at 	reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:201)
	at 	reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:83)
	at 	reactor.core.publisher.InternalFluxOperator.subscribe(InternalFluxOperator.java:68)
	at 	reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.run(FluxSubscribeOn.java:194)
	at 	io.micronaut.core.propagation.PropagatedContext.lambda$wrap$3(PropagatedContext.java:211)
	at 	reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84)
	at 	reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37)
	at 	io.micronaut.core.propagation.PropagatedContext.lambda$wrap$4(PropagatedContext.java:228)
	at 	io.micrometer.core.instrument.composite.CompositeTimer.recordCallable(CompositeTimer.java:129)
	at 	io.micrometer.core.instrument.Timer.lambda$wrap$1(Timer.java:203)
	at 	java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at 	java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at 	java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at 	java.base/java.lang.Thread.run(Thread.java:840)

It's possible this is related to something not explicitly Kotlin, such as reactor, lettuce, or micrometer. I'll see what I can find.

[MT-Jacobs]

Above might be a slightly different issue, though note that I am finding NPEs with logs as well - https://onenr.io/0BR6oka5GjO

    at com.newrelic.agent.Segment.run(Segment.java:203)
    at com.newrelic.agent.ExpirationService.expireSegmentInline(ExpirationService.java:47)
    at com.newrelic.agent.Segment.finish(Segment.java:215)
    at com.newrelic.agent.Segment.end(Segment.java:144)
    at com.nr.lettuce6.instrumentation.NRHolder.end(NRHolder.java:56)
    at com.nr.lettuce6.instrumentation.NRSignalTypeConsumer.accept(NRSignalTypeConsumer.java:24)
    at com.nr.lettuce6.instrumentation.NRSignalTypeConsumer.accept(NRSignalTypeConsumer.java:13)
    at reactor.core.publisher.FluxDoFinally.runFinally(FluxDoFinally.java:146)
    at reactor.core.publisher.FluxDoFinally.cancel(FluxDoFinally.java:135)
    at reactor.core.publisher.Operators.terminate(Operators.java:1328)
    at reactor.core.publisher.StrictSubscriber.cancel(StrictSubscriber.java:155)
    at kotlinx.coroutines.reactive.AwaitKt.invoke(Await.kt:240)
    at kotlinx.coroutines.reactive.AwaitKt.invoke(Await.kt:239)
    at kotlinx.coroutines.reactive.AwaitKt.withSubscriptionLock(Await.kt:310)
    at kotlinx.coroutines.reactive.AwaitKt.onNext(Await.kt:239)
    at reactor.core.publisher.StrictSubscriber.onNext(StrictSubscriber.java:89)
    at reactor.core.publisher.FluxDoFinally.onNext(FluxDoFinally.java:113)
    at reactor.core.publisher.MonoPeekTerminal.onNext(MonoPeekTerminal.java:180)
    at reactor.core.publisher.FluxPeekFuseable.onNext(FluxPeekFuseable.java:854)
    at reactor.core.publisher.MonoNext.onNext(MonoNext.java:82)
    at reactor.core.publisher.MonoNext.onNext(MonoNext.java:82)
    at io.lettuce.core.RedisPublisher.onNext(RedisPublisher.java:890)
    at io.lettuce.core.RedisPublisher.onNext(RedisPublisher.java:291)
    at io.lettuce.core.RedisPublisher.doOnComplete(RedisPublisher.java:777)
    at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:65)
    at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:63)
    at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:745)
    at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:680)
    at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:597)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1475)
    at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1338)
    at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1387)
    at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:530)
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:469)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.channel.DefaultChannelPipeline.channelRead(DefaultChannelPipeline.java:1407)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:918)
    at io.netty.channel.nio.AbstractNioByteChannel.read(AbstractNioByteChannel.java:166)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
    at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:994)
    at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:840)

[dhilpipre]

Hi Matt,

I will have to go back to the Java Agent team to see if they can identify where the problem still exists. We thought that the problem was related when the agent instruments a Suspend function.
For now, remove the Kotlin-Coroutines-Suspend.jar from the extensions directory to get rid of the exceptions.

[SenPavel]

Hi, We are experiencing the same issue as described above. We had a code, which was responsible for reporting the external HTTP call (NewRelic.getAgent().tracedMethod.reportAsExternal), encountered an exception and produced the following stack trace:

	java.lang.IllegalStateException: TransactionActivity is gone
	at com.newrelic.agent.Transaction.getTransactionActivity(Transaction.java:924)
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Original Stack Trace:
		at com.newrelic.agent.Transaction.getTransactionActivity(Transaction.java:924)
		at com.newrelic.agent.AgentImpl.getTracedMethod(AgentImpl.java:56)
		at com.newrelic.agent.AgentImpl.getTracedMethod(AgentImpl.java:32)
		at org.springframework.data.redis.cache.RedisCache.lambda$retrieve$1(RedisCache.java:309)
		at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(Unknown Source)
		at java.base/java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
		at java.base/java.util.concurrent.CompletableFuture.complete(Unknown Source)
		at reactor.core.publisher.MonoToCompletableFuture.onNext(MonoToCompletableFuture.java:64)
		at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
		at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:113)
		at reactor.core.publisher.MonoCreate$DefaultMonoSink.success(MonoCreate.java:176)
		at kotlinx.coroutines.reactor.MonoCoroutine.onCompleted(Mono.kt:99)
		at kotlinx.coroutines.AbstractCoroutine.onCompletionInternal(AbstractCoroutine.kt:92)
		at kotlinx.coroutines.JobSupport.tryFinalizeSimpleState(JobSupport.kt:287)
		at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:887)
		at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:859)
		at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:99)
		at com.newrelic.instrumentation.kotlin.coroutines_19.NRContinuationWrapper.resumeWith(NRContinuationWrapper.java:47)
		at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
		at com.newrelic.instrumentation.kotlin.coroutines_19.NRContinuationWrapper.resumeWith(NRContinuationWrapper.java:47)
		at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
		at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:35)
		at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:101)
		at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
		at com.newrelic.instrumentation.kotlin.coroutines_19.NRContinuationWrapper.resumeWith(NRContinuationWrapper.java:47)
		at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
		at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
		at kotlinx.coroutines.EventLoop.processUnconfinedEvent(EventLoop.common.kt:65)
		at kotlinx.coroutines.DispatchedTaskKt.resumeUnconfined(DispatchedTask.kt:243)
		at kotlinx.coroutines.DispatchedTaskKt.dispatch(DispatchedTask.kt:147)
		at kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:470)
		at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core(CancellableContinuationImpl.kt:504)
		at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core$default(CancellableContinuationImpl.kt:493)
		at kotlinx.coroutines.CancellableContinuationImpl.resumeWith(CancellableContinuationImpl.kt:359)
		at kotlinx.coroutines.future.ContinuationHandler.apply(Future.kt:186)
		at kotlinx.coroutines.future.ContinuationHandler.apply(Future.kt:178)
		at java.base/java.util.concurrent.CompletableFuture.uniHandle(Unknown Source)
		at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(Unknown Source)
		at java.base/java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
		at java.base/java.util.concurrent.CompletableFuture.complete(Unknown Source)
		at org.apache.solr.client.solrj.impl.Http2SolrClient$1.lambda$onHeaders$0(Http2SolrClient.java:489)
		at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:380)
		at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
		at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
		at java.base/java.lang.Thread.run(Unknown Source)

Then we found out that we no longer use these metrics, therefore removed them, but other exceptions started to appear:

Exception in thread "reactor-http-epoll-1" kotlinx.coroutines.CoroutinesInternalError: Fatal exception in coroutines machinery for CancellableContinuation(DispatchedContinuation[Dispatchers.Unconfined, Continuation at {Completed}@31fd60e0. Please read KDoc to 'handleFatalException' method and report this incident to maintainers
	at kotlinx.coroutines.DispatchedTask.handleFatalException$kotlinx_coroutines_core(DispatchedTask.kt:130)
	at kotlinx.coroutines.DispatchedTaskKt.resumeUnconfined(DispatchedTask.kt:250)
	at kotlinx.coroutines.DispatchedTaskKt.dispatch(DispatchedTask.kt:147)
	at kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:470)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core(CancellableContinuationImpl.kt:504)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core$default(CancellableContinuationImpl.kt:493)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeWith(CancellableContinuationImpl.kt:359)
	at kotlinx.coroutines.reactor.MonoKt$awaitSingleOrNull$2$1.onComplete(Mono.kt:52)
	at reactor.core.publisher.StrictSubscriber.onComplete(StrictSubscriber.java:123)
	at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onComplete(FluxHandle.java:223)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onComplete(FluxHandle.java:223)
	at reactor.core.publisher.SerializedSubscriber.onComplete(SerializedSubscriber.java:146)
	at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onComplete(FluxRetryWhen.java:204)
	at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2231)
	at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:246)
	at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)
	at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)
	at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:118)
	at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2231)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onComplete(FluxHandle.java:223)
	at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:209)
	at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:371)
	at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:724)
	at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onComplete(FluxFlattenIterable.java:273)
	at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)
	at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
	at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)
	at reactor.netty.channel.FluxReceive.terminateReceiver(FluxReceive.java:483)
	at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:275)
	at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:419)
	at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:445)
	at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:499)
	at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:800)
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:115)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:289)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
	at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1515)
	at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1378)
	at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1427)
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:530)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:469)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1357)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:868)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:501)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:399)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Unknown Source)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: ["com.newrelic.agent.transaction.TransactionTimer.markTxaFinishTime(com.newrelic.agent.tracers.Tracer)" because "this.transactionTime" is null
	at com.newrelic.agent.Transaction.checkFinishTransaction(Transaction.java:2451)
	at com.newrelic.agent.Transaction.linkTxOnThread(Transaction.java:1497)
	at com.newrelic.agent.TokenImpl.link(TokenImpl.java:91)
	at com.newrelic.instrumentation.kotlin.coroutines_19.NRContinuationWrapper.resumeWith(NRContinuationWrapper.java:44)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTaskKt.resume(DispatchedTask.kt:233)
	at kotlinx.coroutines.DispatchedTaskKt.resumeUnconfined(DispatchedTask.kt:175)

Our environment:
NewRelic Java Agent 8.19.0
NewRelic Java Agent Koltin coroutines extension 1.7.0
JRE 21
Kotlin 2.1.20
Spring WebFlux 3.3.4