Blocking operations in Reactive application using MongoDB reactive drivers - java

I am developing a REST API which is reactive, using Reactive Mongo drivers, Spring Webflux framework.
All works fine when the concurrency level is below 100, however when I increase the concurrency level to 200, blockhound reports blocking calls to Mongo.
I am using Mongod community version on windows, with Blockhound installed in Spring boot application and Apache bench to test the concurrent behaviour.
Below is the error.
This error is reported only when concurrency above 100.
Any suggestions on how to resolve this error?
Please note I have reported this issue with Mongodb community as well.
They have informed that it may be a false positive as system may not have enough resources to create more connections.
If there are no resources to create more connections, should Blockhound report as blocking?
2021-01-02 09:52:17.399 ERROR 18688 --- [reactor-http-nio-2] org.mongodb.driver.operation
: Callback onResult call produced an error.
reactor.blockhound.BlockingOperationError: Blocking call! jdk.internal.misc.Unsafe#park
at java.base/jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.base/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:885)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:917)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1240)
at java.base/java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:267)
at java.base/java.util.concurrent.LinkedBlockingQueue.offer(LinkedBlockingQueue.java:409)
at java.base/java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1347)
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:118)
at java.base/java.util.concurrent.Executors$DelegatedExecutorService.submit(Executors.java:714)
at com.mongodb.internal.connection.DefaultConnectionPool.getAsync(DefaultConnectionPool.java:157)
at com.mongodb.internal.connection.DefaultServer.getConnectionAsync(DefaultServer.java:105)
at com.mongodb.internal.binding.AsyncClusterBinding$AsyncClusterBindingConnectionSource.getConnection(AsyncClusterBinding.java:131)
at com.mongodb.internal.async.client.ClientSessionBinding$SessionBindingAsyncConnectionSource.getConnection(ClientSessionBinding.java:140)
at com.mongodb.internal.operation.OperationHelper.withAsyncConnectionSource(OperationHelper.java:730)
at com.mongodb.internal.operation.OperationHelper.access$200(OperationHelper.java:68)
at com.mongodb.internal.operation.OperationHelper$AsyncCallableWithConnectionAndSourceCallback.onResult(OperationHelper.java:750)
at com.mongodb.internal.operation.OperationHelper$AsyncCallableWithConnectionAndSourceCallback.onResult(OperationHelper.java:738)
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:48)
at com.mongodb.internal.async.client.ClientSessionBinding$WrappingCallback.onResult(ClientSessionBinding.java:208)
at com.mongodb.internal.async.client.ClientSessionBinding$WrappingCallback.onResult(ClientSessionBinding.java:196)
at com.mongodb.internal.binding.AsyncClusterBinding$1.onResult(AsyncClusterBinding.java:105)
at com.mongodb.internal.binding.AsyncClusterBinding$1.onResult(AsyncClusterBinding.java:99)
at com.mongodb.internal.connection.BaseCluster$ServerSelectionRequest.onResult(BaseCluster.java:432)
at com.mongodb.internal.connection.BaseCluster.handleServerSelectionRequest(BaseCluster.java:299)
at com.mongodb.internal.connection.BaseCluster.selectServerAsync(BaseCluster.java:155)
at com.mongodb.internal.connection.SingleServerCluster.selectServerAsync(SingleServerCluster.java:42)
at com.mongodb.internal.binding.AsyncClusterBinding.getAsyncClusterBindingConnectionSource(AsyncClusterBinding.java:99)
at com.mongodb.internal.binding.AsyncClusterBinding.getReadConnectionSource(AsyncClusterBinding.java:84)
at com.mongodb.internal.async.client.ClientSessionBinding.getReadConnectionSource(ClientSessionBinding.java:58)
at com.mongodb.internal.operation.OperationHelper.withAsyncReadConnection(OperationHelper.java:677)
at com.mongodb.internal.operation.FindOperation.executeAsync(FindOperation.java:689)
at com.mongodb.internal.async.client.OperationExecutorImpl$1$1.onResult(OperationExecutorImpl.java:86)
at com.mongodb.internal.async.client.OperationExecutorImpl$1$1.onResult(OperationExecutorImpl.java:74)
at com.mongodb.internal.async.client.OperationExecutorImpl.getReadWriteBinding(OperationExecutorImpl.java:177)
at com.mongodb.internal.async.client.OperationExecutorImpl.access$200(OperationExecutorImpl.java:43)
at com.mongodb.internal.async.client.OperationExecutorImpl$1.onResult(OperationExecutorImpl.java:72)
at com.mongodb.internal.async.client.OperationExecutorImpl$1.onResult(OperationExecutorImpl.java:66)
at com.mongodb.internal.async.client.ClientSessionHelper.createClientSession(ClientSessionHelper.java:60)
at com.mongodb.internal.async.client.ClientSessionHelper.withClientSession(ClientSessionHelper.java:51)
at com.mongodb.internal.async.client.OperationExecutorImpl.execute(OperationExecutorImpl.java:66)
at com.mongodb.internal.async.client.AsyncMongoIterableImpl.batchCursor(AsyncMongoIterableImpl.java:167)
at com.mongodb.reactivestreams.client.internal.MongoIterableSubscription.requestInitialData(MongoIterableSubscription.java:45)
at com.mongodb.reactivestreams.client.internal.AbstractSubscription.tryRequestInitialData(AbstractSubscription.java:177)
at com.mongodb.reactivestreams.client.internal.AbstractSubscription.request(AbstractSubscription.java:100)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:235)
at com.mongodb.reactivestreams.client.internal.MongoIterableSubscription.<init>(MongoIterableSubscription.java:39)
at com.mongodb.reactivestreams.client.internal.Publishers.lambda$publish$0(Publishers.java:43)
at com.mongodb.reactivestreams.client.internal.FindPublisherImpl.subscribe(FindPublisherImpl.java:175)
at reactor.core.publisher.FluxSource.subscribe(FluxSource.java:66)
at reactor.core.publisher.Flux.subscribe(Flux.java:8147)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:195)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:120)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoSupplier.subscribe(MonoSupplier.java:61)
at reactor.core.publisher.Mono.subscribe(Mono.java:4046)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onError(FluxFilter.java:157)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onError(FluxMap.java:259)
at reactor.core.publisher.Operators.error(Operators.java:196)
at reactor.core.publisher.MonoError.subscribe(MonoError.java:52)
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55)
at reactor.core.publisher.Flux.subscribe(Flux.java:8147)
at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:199)
at reactor.core.publisher.MonoFlatMapMany.subscribeOrReturn(MonoFlatMapMany.java:49)
at reactor.core.publisher.Flux.subscribe(Flux.java:8133)
at reactor.core.publisher.FluxUsingWhen.subscribe(FluxUsingWhen.java:93)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:210)
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:210)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onNext(MonoIgnoreThen.java:305)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:251)
at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:336)
at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:99)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:295)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784)
at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:159)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:259)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:383)
at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:396)
at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:540)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:252)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
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(Thread.java:834)


There is a common exception that mongo may kick out when its own query request queue gets too large. This happens because webflux is efficient at passing through requests and the mongo driver chokes, on the database side. The back pressure isn't handled across the connection.
Not sure without seeing code but that could be one thing to investigate.
You may also be making a simple mistake in code and actually calling blocking code in your web handlers.

Related

Jersey. EOF on upoad operation : java.lang.IllegalStateException: Unable to perform operation: resolve on xxx.UploadFileData

In general, not so long ago we encountered a problem, for some reason, all attempts to upload a file for a client fail. On the back we get an exception:
Jersey 2.33
Dropwizard 2.0.28
MultiException stack 1 of 15
org.glassfish.jersey.server.internal.process.MappableException: org.eclipse.jetty.io.EofException: Early EOF
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundReadFrom(MappableExceptionWrapperInterceptor.java:53)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:132)
at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1072)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:885)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:819)
at org.glassfish.jersey.server.ContainerRequest.readEntity(ContainerRequest.java:245)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$ValueProvider.getEntity(FormDataParamValueParamProvider.java:84)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$FormDataParamValueProvider.apply(FormDataParamValueParamProvider.java:235)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$FormDataParamValueProvider.apply(FormDataParamValueParamProvider.java:222)
at org.glassfish.jersey.server.internal.inject.ParamInjectionResolver.resolve(ParamInjectionResolver.java:97)
at org.glassfish.jersey.inject.hk2.InjectionResolverWrapper.resolve(InjectionResolverWrapper.java:62)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:188)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:211)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:334)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:463)
at org.glassfish.jersey.inject.hk2.RequestContext.findOrCreate(RequestContext.java:59)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2102)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:758)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:721)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:691)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getInstance(AbstractHk2InjectionManager.java:160)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getInstance(ImmediateHk2InjectionManager.java:30)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:68)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:44)
at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.apply(ParamValueFactoryWithSource.java:50)
at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:64)
....
MultiException stack 13 of 15
java.lang.IllegalStateException: Entity input stream has already been closed.
at org.glassfish.jersey.message.internal.EntityInputStream.ensureNotClosed(EntityInputStream.java:205)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:865)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:819)
at org.glassfish.jersey.server.ContainerRequest.readEntity(ContainerRequest.java:245)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$ValueProvider.getEntity(FormDataParamValueParamProvider.java:84)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$FormDataParamValueProvider.apply(FormDataParamValueParamProvider.java:235)
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueParamProvider$FormDataParamValueProvider.apply(FormDataParamValueParamProvider.java:222)
at org.glassfish.jersey.server.internal.inject.ParamInjectionResolver.resolve(ParamInjectionResolver.java:97)
at org.glassfish.jersey.inject.hk2.InjectionResolverWrapper.resolve(InjectionResolverWrapper.java:62)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:188)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:211)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:334)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:463)
at org.glassfish.jersey.inject.hk2.RequestContext.findOrCreate(RequestContext.java:59)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2102)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:758)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:721)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:691)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getInstance(AbstractHk2InjectionManager.java:160)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getInstance(ImmediateHk2InjectionManager.java:30)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:68)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:44)
at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.apply(ParamValueFactoryWithSource.java:50)
at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:64)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$AbstractMethodParamInvoker.getParamValues(JavaResourceMethodDispatcherProvider.java:109)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1631)
at io.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:35)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at io.dropwizard.jersey.filter.AllowedMethodsFilter.handle(AllowedMethodsFilter.java:47)
at io.dropwizard.jersey.filter.AllowedMethodsFilter.doFilter(AllowedMethodsFilter.java:41)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:319)
at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:273)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at com.google.inject.servlet.DefaultFilterPipeline.dispatch(DefaultFilterPipeline.java:47)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:313)
at io.dropwizard.jetty.RoutingHandler.handle(RoutingHandler.java:52)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:713)
at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:179)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:516)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:400)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:645)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:392)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
at java.lang.Thread.run(Thread.java:748)
MultiException stack 14 of 15
java.lang.IllegalArgumentException: While attempting to resolve the dependencies of com.xxxxxx.document.UploadDocumentCmd errors were found
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:224)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:334)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:463)
at org.glassfish.jersey.inject.hk2.RequestContext.findOrCreate(RequestContext.java:59)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2102)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:758)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:721)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:691)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getInstance(AbstractHk2InjectionManager.java:160)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getInstance(ImmediateHk2InjectionManager.java:30)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:68)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:44)
at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.apply(ParamValueFactoryWithSource.java:50)
at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:64)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$AbstractMethodParamInvoker.getParamValues(JavaResourceMethodDispatcherProvider.java:109)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
at java.lang.Thread.run(Thread.java:748)
MultiException stack 15 of 15
java.lang.IllegalStateException: Unable to perform operation: resolve on xxx.xxxxx.xxxxx.UploadDocumentCmd
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:363)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:463)
at org.glassfish.jersey.inject.hk2.RequestContext.findOrCreate(RequestContext.java:59)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2102)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:758)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:721)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:691)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getInstance(AbstractHk2InjectionManager.java:160)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getInstance(ImmediateHk2InjectionManager.java:30)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:68)
at org.glassfish.jersey.server.internal.inject.BeanParamValueParamProvider$BeanParamValueProvider.apply(BeanParamValueParamProvider.java:44)
at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.apply(ParamValueFactoryWithSource.java:50)
at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:64)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$AbstractMethodParamInvoker.getParamValues(JavaResourceMethodDispatcherProvider.java:109)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1631)
at io.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:35)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at io.dropwizard.jersey.filter.AllowedMethodsFilter.handle(AllowedMethodsFilter.java:47)
at io.dropwizard.jersey.filter.AllowedMethodsFilter.doFilter(AllowedMethodsFilter.java:41)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:319)
at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:273)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at com.google.inject.servlet.DefaultFilterPipeline.dispatch(DefaultFilterPipeline.java:47)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:313)
at io.dropwizard.jetty.RoutingHandler.handle(RoutingHandler.java:52)
Full stack trace in pastebin https://pastebin.com/DXi0vw17
Strange thing, but this error occurs only for one client. It is clear that the problem is not in the application logic, since judging by the exception, the error occurs at the DI (HK2) level.
Interestingly, the bean that XK2 swears at (UploadDocumentCmd) is the most ordinary bean.
I would be grateful if you tell me where to dig, and how to explain this problem.
Thanks for any help
Nothing abnormal was found in the logs. It is not yet possible to catch a request from a client at the level of http packets.

The error "Early EOF" could be because the server is triggering the error because it has reached the end of the stream on the request body content. Upgrade to the latest Jersey version and ensure the Client side properly uses HTTP. And try uploading files in chunks or trace if the upload file Size has something to do with the Error.

Yes, as it turned out the problem is really on the client side. For some reason, the multipart query data was getting corrupted. Unfortunately, it's impossible to figure out why this is happening.

Stomp gives TCP connection failure and disconnection error

I have been using STOMP and sockjs for some time now, but the error below happens at times.
12:57:30.976 [48] [tcp-client-loop-nio-4] INFO org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler - TCP connection failure in session w6s21o5d: failed to forward DISCONNECT session=w6s21o5d
reactor.netty.channel.AbortedException: io.netty.channel.StacklessClosedChannelException
at reactor.netty.FutureMono$FutureSubscription.wrapError(FutureMono.java:186) ~[reactor-netty-core-1.0.7.jar!/:1.0.7]
at reactor.netty.FutureMono$FutureSubscription.operationComplete(FutureMono.java:177) [reactor-netty-core-1.0.7.jar!/:1.0.7]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:552) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.safeSetFailure(AbstractChannel.java:1021) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(AbstractChannel.java:882) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.write(DefaultChannelPipeline.java:1367) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.timeout.IdleStateHandler.write(IdleStateHandler.java:304) [netty-handler-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1071) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:497) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: io.netty.channel.StacklessClosedChannelException
The disconnection message is send from frontend as shown below before page reload.
window.addEventListener("beforeunload", function () {
client.disconnect(function () {
log("disconnect websocket..");
});
});
No logic is written in backend to handle this spring-stomp handles rest of it.
I have gone through resources in STOMP and there is still no explanation on why or exactly on what scenarios this is happening. What could be the possible reasons for this error.

InternalServerError: Unknown server error occurred when processing this request

I receive sporadic the follow error with the Azure CosmosDB emulator on calling CosmosDatabase.createContainerIfNotExists.
Also if the error message contains many helpless details there is nothing to understand the cause. How can I get more information about the error from the Azure CosmosDB emulator?
What can be the cause of the error? The count of existing container if the error occur is approximate 70 to 130. This should be no problem for the limit of 250 containers.
What is the best handling of the error?
{"ClassName":"CosmosException","userAgent":"azsdk-java-cosmos/4.17.0 Linux/5.4.0-84-generic JRE/11.0.12",
"statusCode":500,"resourceAddress":"https://10.10.1.150:8081/dbs/test/colls",
"error":"{\"code\":\"InternalServerError\",\"message\":\"Unknown server error occurred when processing this request.\\r\\nActivityId: 70bc2604-9e3c-4093-ad46-16bcc069a243, Microsoft.Azure.Documents.Common/2.14.0,
StatusCode: InternalServerError\",\"additionalErrorInfo\":null}",
"innerErrorMessage":"Unknown server error occurred when processing this request.\r\nActivityId: 70bc2604-9e3c-4093-ad46-16bcc069a243, Microsoft.Azure.Documents.Common/2.14.0,
StatusCode: InternalServerError","causeInfo":null,"responseHeaders":"{Transfer-Encoding=chunked, Server=Microsoft-HTTPAPI/2.0, Access-Control-Allow-Origin=, Access-Control-Allow-Credentials=true, x-ms-gatewayversion=version=2.14.0, Date=Fri, 03 Dec 2021 03:23:08 GMT, x-ms-activity-id=70bc2604-9e3c-4093-ad46-16bcc069a243, Content-Type=application/json}","requestHeaders":"[Accept=application/json, x-ms-date=Fri, 03 Dec 2021 03:23:08 GMT, Content-Type=application/json]",
"cosmosDiagnostics":{"userAgent":"azsdk-java-cosmos/4.17.0 Linux/5.4.0-84-generic JRE/11.0.12",
"requestLatencyInMs":519,"requestStartTimeUTC":"2021-12-03T03:23:08.615098Z","requestEndTimeUTC":"2021-12-03T03:23:09.134243Z","responseStatisticsList":[],"supplementalResponseStatisticsList":[],"addressResolutionStatistics":{},"regionsContacted":["https://10.10.1.150:8081/"],
"retryContext":{"statusAndSubStatusCodes":null,"retryLatency":0,"retryCount":0},"metadataDiagnosticsContext":{"metadataDiagnosticList":null},"serializationDiagnosticsContext":{"serializationDiagnosticsList":[{"serializationType":"CONTAINER_SERIALIZATION","startTimeUTC":"2021-12-03T03:23:08.615202Z","endTimeUTC":"2021-12-03T03:23:08.615249Z","durationInMicroSec":47}]},
"gatewayStatistics":{"sessionToken":null,"operationType":"Create","resourceType":"DocumentCollection","statusCode":500,"subStatusCode":0,"requestCharge":null,"requestTimeline":[{"eventName":"connectionCreated","startTimeUTC":"2021-12-03T03:23:08.615391Z","durationInMicroSec":235},{"eventName":"connectionConfigured","startTimeUTC":"2021-12-03T03:23:08.615626Z","durationInMicroSec":27},{"eventName":"requestSent","startTimeUTC":"2021-12-03T03:23:08.615653Z","durationInMicroSec":314},{"eventName":"transitTime","startTimeUTC":"2021-12-03T03:23:08.615967Z","durationInMicroSec":517832},{"eventName":"received","startTimeUTC":"2021-12-03T03:23:09.133799Z","durationInMicroSec":173}]},
"systemInformation":{"usedMemory":"250743 KB","availableMemory":"273545 KB","systemCpuLoad":"(2021-12-03T03:22:43.164095Z 4.0%), (2021-12-03T03:22:48.164056Z 2.6%), (2021-12-03T03:22:53.164086Z 3.3%), (2021-12-03T03:22:58.164100Z 2.6%), (2021-12-03T03:23:03.164114Z 2.1%), (2021-12-03T03:23:08.164169Z 2.1%)","availableProcessors":8},"clientCfgs":{"id":-1,"connectionMode":"DIRECT","numberOfClients":2,"connCfg":{"rntbd":"(cto:PT5S, rto:PT5S, icto:PT0S, ieto:PT1H, mcpe:130, mrpc:30, cer:false)","gw":"(cps:1000, rto:PT5S, icto:null, p:false)","other":"(ed: true, cs: false)"},"consistencyCfg":"(consistency: null, mm: true, prgns: [])"}}}
at com.azure.cosmos.BridgeInternal.createCosmosException(BridgeInternal.java:463)
at com.azure.cosmos.implementation.RxGatewayStoreModel.validateOrThrow(RxGatewayStoreModel.java:365)
at com.azure.cosmos.implementation.RxGatewayStoreModel.lambda$toDocumentServiceResponse$0(RxGatewayStoreModel.java:294)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:106)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199)
at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:118)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:220)
at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onNext(FluxDoFinally.java:130)
at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.onNext(FluxHandleFuseable.java:184)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815)
at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:128)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:259)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:401)
at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:416)
at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:470)
at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:685)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1368)
at io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
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(Thread.java:829)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
at reactor.core.publisher.Mono.block(Mono.java:1703)
at com.azure.cosmos.CosmosDatabase.blockContainerResponse(CosmosDatabase.java:291)
at com.azure.cosmos.CosmosDatabase.createContainerIfNotExists(CosmosDatabase.java:198)

For Error –
Suppressed: java.lang.Exception: #block terminated with an error
If you face block terminated error. you should create a new connection while making an api call. This would solve the issue.
I would suggest you raise support ticket
You can also refer to this GitHub repo for CosmosDatabase.createContainerIfNotExists

I solved the problem by already trying to create the container when initializing my objects at startup. I ignore an error at this point. This initialization is largely sequential.
When using the container a while later, I then try again if it failed before. This reduces the startup time of the application a bit, but the error no longer occurred.

Can not connect to AWS Redis Cache with spring boot

There are two nodes on AWS and I am using spring-boot 2.2.6 release.
#Bean
public LettuceConnectionFactory redisConnectionFactory( String hostname, String password) {
//List<String> nodes = Collections.singletonList(hostname+":6379");
RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration()
.clusterNode("cf-xxx11xxxx.cache.amazonaws.com",6379)
.clusterNode("cf-xxx22xxxx.cache.amazonaws.com", 6379);
redisClusterConfiguration.setPassword(password);
LettuceClientConfiguration lettuceClientConfiguration = LettuceClientConfiguration.builder().useSsl().disablePeerVerification().build();
LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(redisClusterConfiguration, lettuceClientConfiguration);
return lettuceConnectionFactory;
}
When spring boot came up, the exception showed as following:
Caused by: io.lettuce.core.RedisException: Cannot retrieve initial cluster partitions from initial URIs [RedisURI [host='cf-xxxx11.cache.amazonaws.com', port=6379]]
at io.lettuce.core.cluster.topology.ClusterTopologyRefresh.tryFail(ClusterTopologyRefresh.java:143) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.topology.ClusterTopologyRefresh.loadViews(ClusterTopologyRefresh.java:105) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.doLoadPartitions(RedisClusterClient.java:865) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.loadPartitions(RedisClusterClient.java:838) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.initializePartitions(RedisClusterClient.java:813) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.getPartitions(RedisClusterClient.java:823) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvider.getConnectionAsync(ClusterConnectionProvider.java:92) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvider.getConnectionAsync(ClusterConnectionProvider.java:40) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.LettuceConnectionProvider.getConnection(LettuceConnectionProvider.java:53) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1197) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
... 94 common frames omitted
Caused by: io.lettuce.core.RedisCommandExecutionException: ERR This instance has cluster support disabled
at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:120) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:111) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.topology.TimedAsyncCommand.complete(TimedAsyncCommand.java:51) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:59) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:654) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:614) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:565) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1486) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1235) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
... 1 common frames omitted
Googled a lot and did not find the solution. Could it be setting SSL or TLS issue? Tried to set lettuceConnectionFactory properties but they did not work.

Make sure the redis's configuration cluster-enabled is set with value yes. In the case of AWS redis It is enabled on aws console on cluster mode configuration.
This issue raises when this configuration is disabled, because os trying to connect as cluster on an instante that is not enabled to handle this.

Java / No campaign available for requested device model

I think that this following error message might be specific to the project that I am working out upon, but, by any chance does any one know what might be the cause of this following error message and how to deal with it?
post DynamicAdRequest failed
java.util.NoSuchElementException: Sequence contains no elements
at rx.internal.operators.OperatorSingle$ParentSubscriber.onCompleted(OperatorSingle.java:115)
at rx.observers.SerializedObserver.onCompleted(SerializedObserver.java:176)
at rx.observers.SerializedSubscriber.onCompleted(SerializedSubscriber.java:64)
at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:246)
at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onCompleted(OnSubscribeConcatMap.java:169)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97)
at rx.observers.SerializedObserver.onCompleted(SerializedObserver.java:176)
at rx.observers.SerializedSubscriber.onCompleted(SerializedSubscriber.java:64)
at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:246)
at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onCompleted(OnSubscribeConcatMap.java:169)
at rx.internal.operators.OnSubscribeFromArray$FromArrayProducer.slowPath(OnSubscribeFromArray.java:106)
at rx.internal.operators.OnSubscribeFromArray$FromArrayProducer.request(OnSubscribeFromArray.java:63)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeFromArray.call(OnSubscribeFromArray.java:32)
at rx.internal.operators.OnSubscribeFromArray.call(OnSubscribeFromArray.java:24)
at rx.Observable.unsafeSubscribe(Observable.java:10256)
at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)
at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)
at rx.Observable.unsafeSubscribe(Observable.java:10256)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.Observable.unsafeSubscribe(Observable.java:10256)
at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)
at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.subscribe(Observable.java:10352)
at rx.Observable.subscribe(Observable.java:10319)
at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443)
at rx.observables.BlockingObservable.single(BlockingObservable.java:340)
at com.samsung.dsp.dbhandler.SqlConnectionProvider.getDeviceGroup(SqlConnectionProvider.java:114)
at com.samsung.dsp.networkrequesthandler.RequestHandlerVerticle.dynamicAdRequestHandler(RequestHandlerVerticle.java:135)
at io.vertx.reactivex.ext.web.api.contract.openapi3.OpenAPI3RouterFactory$6.handle(OpenAPI3RouterFactory.java:241)
at io.vertx.reactivex.ext.web.api.contract.openapi3.OpenAPI3RouterFactory$6.handle(OpenAPI3RouterFactory.java:239)
at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219)
at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:85)
at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133)
at io.vertx.ext.web.api.validation.impl.BaseValidationHandler.handle(BaseValidationHandler.java:89)
at io.vertx.ext.web.api.validation.impl.BaseValidationHandler.handle(BaseValidationHandler.java:19)
at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219)
at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:85)
at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133)
at io.vertx.ext.web.handler.impl.ResponseContentTypeHandlerImpl.handle(ResponseContentTypeHandlerImpl.java:54)
at io.vertx.ext.web.handler.impl.ResponseContentTypeHandlerImpl.handle(ResponseContentTypeHandlerImpl.java:28)
at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219)
at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:120)
at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133)
at io.vertx.ext.web.handler.impl.BodyHandlerImpl$BHandler.doEnd(BodyHandlerImpl.java:231)
at io.vertx.ext.web.handler.impl.BodyHandlerImpl$BHandler.end(BodyHandlerImpl.java:211)
at io.vertx.ext.web.handler.impl.BodyHandlerImpl.lambda$handle$0(BodyHandlerImpl.java:74)
at io.vertx.core.http.impl.HttpServerRequestImpl.handleEnd(HttpServerRequestImpl.java:417)
at io.vertx.core.http.impl.Http1xServerConnection.handleEnd(Http1xServerConnection.java:482)
at io.vertx.core.http.impl.Http1xServerConnection.handleContent(Http1xServerConnection.java:477)
at io.vertx.core.http.impl.Http1xServerConnection.processMessage(Http1xServerConnection.java:458)
at io.vertx.core.http.impl.Http1xServerConnection.handleMessage(Http1xServerConnection.java:144)
at io.vertx.core.http.impl.HttpServerImpl$ServerHandlerWithWebSockets.handleMessage(HttpServerImpl.java:712)
at io.vertx.core.http.impl.HttpServerImpl$ServerHandlerWithWebSockets.handleMessage(HttpServerImpl.java:619)
at io.vertx.core.net.impl.VertxHandler.lambda$channelRead$1(VertxHandler.java:146)
at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:337)
at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:195)
at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:144)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:141)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Unknown Source)

You are calling Observable.concatMap() with an empty list of observables. Without seeing your code, we can't narrow it down any further.

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