Spring Blocking calls detected by Blockhound when calling Swagger endpoint

Blockhound detects blocking call.

Spring version spring-webflux 5.1.9.RELEASE

JVM version (e.g. java -version) java 11.0.3 2019-04-16 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.3+12-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.3+12-LTS, mixed mode)

OS version (e.g. uname -a) macOS Mojave 10.14.5

    at reactor.blockhound.BlockHound$Builder.lambda$install$8(BlockHound.java:259) ~[blockhound-1.0.0.M4.jar:?]
    at reactor.blockhound.BlockHoundRuntime.checkBlocking(BlockHoundRuntime.java:43) ~[blockhound-1.0.0.M4.jar:?]
    at java.io.RandomAccessFile.readBytes(RandomAccessFile.java) ~[?:?]
    at java.io.RandomAccessFile.read(RandomAccessFile.java:406) ~[?:?]
    at java.io.RandomAccessFile.readFully(RandomAccessFile.java:470) ~[?:?]
    at java.util.zip.ZipFile$Source.readFullyAt(ZipFile.java:1304) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInputStream.initDataOffset(ZipFile.java:998) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:1013) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:468) ~[?:?]
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:159) ~[?:?]
    at java.io.InputStream.readNBytes(InputStream.java:490) ~[?:?]
    at java.util.jar.JarFile.getBytes(JarFile.java:805) ~[?:?]
    at java.util.jar.JarFile.checkForSpecialAttributes(JarFile.java:1005) ~[?:?]
    at java.util.jar.JarFile.isMultiRelease(JarFile.java:388) ~[?:?]
    at java.util.jar.JarFile.getEntry(JarFile.java:507) ~[?:?]
    at sun.net.www.protocol.jar.URLJarFile.getEntry(URLJarFile.java:131) ~[?:?]
    at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:137) ~[?:?]
    at sun.net.www.protocol.jar.JarURLConnection.getContentLengthLong(JarURLConnection.java:182) ~[?:?]
    at org.springframework.core.io.AbstractFileResolvingResource.isReadable(AbstractFileResolvingResource.java:109) ~[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.reactive.resource.PathResourceResolver.getResource(PathResourceResolver.java:117) ~[spring-webflux-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.reactive.resource.PathResourceResolver.lambda$getResource$1(PathResourceResolver.java:99) ~[spring-webflux-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:368) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:212) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:275) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:849) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2071) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1879) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1753) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:442) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:212) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1515) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:247) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:329) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2071) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:318) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:64) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:226) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:442) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:161) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:328) [netty-codec-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:302) [netty-codec-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1421) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:930) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.AbstractKQueueStreamChannel$KQueueStreamUnsafe.readReady(AbstractKQueueStreamChannel.java:544) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.AbstractKQueueChannel$AbstractKQueueUnsafe.readReady(AbstractKQueueChannel.java:376) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.KQueueEventLoop.processReady(KQueueEventLoop.java:211) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.KQueueEventLoop.run(KQueueEventLoop.java:289) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at java.lang.Thread.run(Thread.java:834) [?:?]

    at reactor.blockhound.BlockHound$Builder.lambda$install$8(BlockHound.java:259) ~[blockhound-1.0.0.M4.jar:?]
    at reactor.blockhound.BlockHoundRuntime.checkBlocking(BlockHoundRuntime.java:43) ~[blockhound-1.0.0.M4.jar:?]
    at java.io.RandomAccessFile.readBytes(RandomAccessFile.java) ~[?:?]
    at java.io.RandomAccessFile.read(RandomAccessFile.java:406) ~[?:?]
    at java.io.RandomAccessFile.readFully(RandomAccessFile.java:470) ~[?:?]
    at java.util.zip.ZipFile$Source.readFullyAt(ZipFile.java:1304) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInputStream.initDataOffset(ZipFile.java:998) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:1013) ~[?:?]
    at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:468) ~[?:?]
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:159) ~[?:?]
    at java.io.FilterInputStream.read(FilterInputStream.java:133) ~[?:?]
    at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284) ~[?:?]
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326) ~[?:?]
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178) ~[?:?]
    at java.io.InputStreamReader.read(InputStreamReader.java:185) ~[?:?]
    at java.io.BufferedReader.fill(BufferedReader.java:161) ~[?:?]
    at java.io.BufferedReader.readLine(BufferedReader.java:326) ~[?:?]
    at java.io.BufferedReader.readLine(BufferedReader.java:392) ~[?:?]
    at org.springframework.http.MediaTypeFactory.parseMimeTypes(MediaTypeFactory.java:71) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.http.MediaTypeFactory.<clinit>(MediaTypeFactory.java:47) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.reactive.resource.ResourceWebHandler.lambda$handle$1(ResourceWebHandler.java:354) ~[spring-webflux-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:118) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1515) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:422) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:212) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:275) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:849) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2071) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1879) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1753) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:442) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:212) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1515) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:247) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:329) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2071) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:318) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.Mono.subscribe(Mono.java:3858) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.12.RELEASE.jar:3.2.12.RELEASE]
    at reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:64) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:226) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:442) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:161) [reactor-netty-0.8.11.RELEASE.jar:0.8.11.RELEASE]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:328) [netty-codec-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:302) [netty-codec-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1421) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:930) [netty-transport-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.AbstractKQueueStreamChannel$KQueueStreamUnsafe.readReady(AbstractKQueueStreamChannel.java:544) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.AbstractKQueueChannel$AbstractKQueueUnsafe.readReady(AbstractKQueueChannel.java:376) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.KQueueEventLoop.processReady(KQueueEventLoop.java:211) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.channel.kqueue.KQueueEventLoop.run(KQueueEventLoop.java:289) [netty-all-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.39.Final.jar:4.1.39.Final]
    at java.lang.Thread.run(Thread.java:834) [?:?]

Comment From: rstoyanchev

I'm having trouble reproducing the exact stacktrace. Can you describe your setup?

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: vlatrovkin

Repository to reproduce the error - https://github.com/vlatrovkin/swagger-webflux Call - http://localhost:8080/swagger-ui.html

reactor.blockhound.BlockingOperationError: Blocking call! java.io.RandomAccessFile#readBytes
    at java.base/java.io.RandomAccessFile.readBytes(RandomAccessFile.java) ~[na:na]
    at java.base/java.io.RandomAccessFile.read(RandomAccessFile.java:407) ~[na:na]
    at java.base/java.io.RandomAccessFile.readFully(RandomAccessFile.java:471) ~[na:na]
    at java.base/java.util.zip.ZipFile$Source.readFullyAt(ZipFile.java:1310) ~[na:na]
    at java.base/java.util.zip.ZipFile$ZipFileInputStream.initDataOffset(ZipFile.java:995) ~[na:na]
    at java.base/java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:1010) ~[na:na]
    at java.base/java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:468) ~[na:na]
    at java.base/java.util.zip.InflaterInputStream.read(InflaterInputStream.java:159) ~[na:na]
    at java.base/java.io.FilterInputStream.read(FilterInputStream.java:133) ~[na:na]
    at java.base/java.io.FilterInputStream.read(FilterInputStream.java:107) ~[na:na]
    at java.base/java.util.Properties$LineReader.readLine(Properties.java:503) ~[na:na]
    at java.base/java.util.Properties.load0(Properties.java:419) ~[na:na]
    at java.base/java.util.Properties.load(Properties.java:408) ~[na:na]
    at org.springframework.web.util.HtmlCharacterEntityReferences.<init>(HtmlCharacterEntityReferences.java:75) ~[spring-web-5.3.4.jar:5.3.4]
    at org.springframework.web.util.HtmlUtils.<clinit>(HtmlUtils.java:46) ~[spring-web-5.3.4.jar:5.3.4]
    at org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler.htmlEscape(AbstractErrorWebExceptionHandler.java:295) ~[spring-boot-autoconfigure-2.4.3.jar:2.4.3]
    at org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler.renderDefaultErrorView(AbstractErrorWebExceptionHandler.java:282) ~[spring-boot-autoconfigure-2.4.3.jar:2.4.3]
    at org.springframework.boot.autoconfigure.web.reactive.error.DefaultErrorWebExceptionHandler.renderErrorView(DefaultErrorWebExceptionHandler.java:141) ~[spring-boot-autoconfigure-2.4.3.jar:2.4.3]
    at org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler.lambda$handle$0(AbstractErrorWebExceptionHandler.java:326) ~[spring-boot-autoconfigure-2.4.3.jar:2.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:125) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onNext(FluxConcatArray.java:177) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:208) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatArray.subscribe(FluxConcatArray.java:80) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:106) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onError(FluxOnAssembly.java:392) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators.error(Operators.java:197) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoError.subscribe(MonoError.java:52) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:192) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java:259) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MonoSubscriber.onError(Operators.java:1862) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreInner.onError(MonoIgnoreThen.java:243) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2062) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2062) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:381) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFromFluxOperator.subscribe(MonoFromFluxOperator.java:81) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:366) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:173) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:448) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.Mono.subscribe(Mono.java:4046) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:173) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.3.jar:3.4.3]
    at reactor.netty.http.server.HttpServer$HttpServerHandle.onStateChange(HttpServer.java:860) ~[reactor-netty-http-1.0.4.jar:1.0.4]
    at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:638) ~[reactor-netty-core-1.0.4.jar:1.0.4]
    at reactor.netty.transport.ServerTransport$ChildObserver.onStateChange(ServerTransport.java:478) ~[reactor-netty-core-1.0.4.jar:1.0.4]
    at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:525) ~[reactor-netty-http-1.0.4.jar:1.0.4]
    at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94) ~[reactor-netty-core-1.0.4.jar:1.0.4]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:209) ~[reactor-netty-http-1.0.4.jar:1.0.4]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-codec-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[netty-codec-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.59.Final.jar:4.1.59.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.59.Final.jar:4.1.59.Final]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]