ImageService createImage() throws NoSuchFileException

[adrian110288]

learning-spring-boot-2nd-edition-code/2/part2/src/main/java/com/greglturnquist/learningspringboot/ImageService.java

Line 76 in e937067

return files

For some reason createImage() throws this exception:

java.nio.file.NoSuchFileException: upload-dir/sarah-crutchfield-549.jpg
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86) ~[na:1.8.0_152]
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[na:1.8.0_152]
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[na:1.8.0_152]
at sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:177) ~[na:1.8.0_152]
at java.nio.channels.FileChannel.open(FileChannel.java:287) ~[na:1.8.0_152]
at java.nio.channels.FileChannel.open(FileChannel.java:335) ~[na:1.8.0_152]
at org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart.transferTo(SynchronossPartHttpMessageReader.java:303) ~[spring-web-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at com.greglturnquist.learningspringboot.learningspringboot.ImageService.lambda$createImage$2(ImageService.java:47) ~[main/:na]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:347) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:391) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:633) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onNext(FluxFlattenIterable.java:238) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:97) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replayNormal(FluxReplay.java:808) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replay(FluxReplay.java:892) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.ReplayProcessor$ReplayInner.request(ReplayProcessor.java:561) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFilter$FilterSubscriber.request(FluxFilter.java:161) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onSubscribe(FluxFlattenIterable.java:225) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFilter$FilterSubscriber.onSubscribe(FluxFilter.java:76) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.ReplayProcessor.subscribe(ReplayProcessor.java:315) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Flux.subscribe(Flux.java:6571) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoProcessor.subscribe(MonoProcessor.java:434) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFilter.subscribe(MonoFilter.java:46) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlattenIterable.subscribe(MonoFlattenIterable.java:101) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty.subscribe(FluxSwitchIfEmpty.java:45) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxFlatMap.subscribe(FluxFlatMap.java:97) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreElements.subscribe(MonoIgnoreElements.java:37) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3008) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:167) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1092) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:73) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1092) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onNext(MonoIgnoreThen.java:290) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1092) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1092) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:258) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:329) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1649) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:138) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:318) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:172) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3008) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoZip$ZipCoordinator.subscribe(MonoZip.java:180) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:126) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:148) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:271) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:803) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:115) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1649) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1463) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1337) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3008) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:418) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:210) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:128) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:61) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:108) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replayNormal(FluxReplay.java:808) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replay(FluxReplay.java:892) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.ReplayProcessor$ReplayInner.request(ReplayProcessor.java:561) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:149) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:86) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.ReplayProcessor.subscribe(ReplayProcessor.java:315) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Flux.subscribe(Flux.java:6571) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoProcessor.subscribe(MonoProcessor.java:434) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoMap.subscribe(MonoMap.java:55) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3008) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:167) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3008) ~[reactor-core-3.1.2.RELEASE.jar:3.1.2.RELEASE]
at org.springframework.http.server.reactive.ServletHttpHandlerAdapter.service(ServletHttpHandlerAdapter.java:169) ~[spring-web-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_152]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_152]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_152]

Any idea what that would happen?

[salismt]

@gregturn kindly help

[pbaletkeman]

Are you certain that the program has the correct access rights to create both the directory and the file(s)?
I'm using Windows 10 Pro and it the code worked fine for me, however if I read your logs correctly you are using a Unix based operating system. In order to narrow this down more I suggest that you enable DEBUG logging and that you append .log() method to where you can e.g.

public Mono<Void> createImage(Flux<FilePart> files) {
		return files
			.log("CreateImage-before TransferTo")
			.flatMap(file -> file.transferTo(
			 	Paths.get(UPLOAD_ROOT, file.filename()).toFile()))
			.log("CreateImage-after FlatMap")
                        .then()
                        .log("CreateImage-after then");
	}

[gregturn]

Well to round this out, I wrote the code on a Mac (BSD cousin).

[gregturn]

@letkemanpete78 If you don't mind, I polished your suggestion slightly.

[pbaletkeman]

@gregturn Go ahead, I'm sure that you know what you are doing after all you created this code the the book which references it. I hope that I wasn't out of line with my previous suggestion. If I was then let me apologize.

[gregturn]

No! I appreciate inputs. I really enjoy building a community around anything Spring.

BTW if you have found the book useful, an Amazon review would really help me out.

[digsim]

Did anybody solve this issue? I'm facing the same problem. Added the logs to the code as suggested by @letkemanpete78. This is the relevant extract from the log:

2018-02-20 08:25:30.165 DEBUG 21527 --- [ctor-http-nio-2] o.h.d.l.service.ImageService             : File name and Path /Users/rupan/Projects/MyProjects/learning-spring-boot/upload-dir/logback.xml
2018-02-20 08:25:30.174  INFO 21527 --- [ctor-http-nio-2] CreateImage-before TransferTo            : onSubscribe(FluxSwitchIfEmpty.SwitchIfEmptySubscriber)
2018-02-20 08:25:30.175  INFO 21527 --- [ctor-http-nio-2] CreateImage-after FlatMap                : onSubscribe(FluxFlatMap.FlatMapMain)
2018-02-20 08:25:30.176  INFO 21527 --- [ctor-http-nio-2] CreateImage-after then                   : onSubscribe(MonoIgnoreElements.IgnoreElementsSubscriber)
2018-02-20 08:25:30.177  INFO 21527 --- [ctor-http-nio-2] CreateImage-after then                   : request(unbounded)
2018-02-20 08:25:30.177  INFO 21527 --- [ctor-http-nio-2] CreateImage-after FlatMap                : request(unbounded)
2018-02-20 08:25:30.177  INFO 21527 --- [ctor-http-nio-2] CreateImage-before TransferTo            : request(256)
2018-02-20 08:25:30.215  INFO 21527 --- [ctor-http-nio-2] CreateImage-before TransferTo            : onNext(org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart@5a48651d)
2018-02-20 08:25:30.218  INFO 21527 --- [ctor-http-nio-2] CreateImage-before TransferTo            : cancel()
2018-02-20 08:25:30.219  INFO 21527 --- [ctor-http-nio-2] CreateImage-before TransferTo            : cancel()
2018-02-20 08:25:30.219 ERROR 21527 --- [ctor-http-nio-2] CreateImage-after FlatMap                : onError(java.nio.file.NoSuchFileException: upload-dir/logback.xml)
2018-02-20 08:25:30.233 ERROR 21527 --- [ctor-http-nio-2] CreateImage-after FlatMap                :

java.nio.file.NoSuchFileException: upload-dir/logback.xml
        at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86) ~[na:1.8.0_74]
        at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[na:1.8.0_74]
        at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[na:1.8.0_74]
        at sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:177) ~[na:1.8.0_74]
        at java.nio.channels.FileChannel.open(FileChannel.java:287) ~[na:1.8.0_74]
        at java.nio.channels.FileChannel.open(FileChannel.java:335) ~[na:1.8.0_74]

If I modify the create function like:

public Mono<Void> createImage(Flux<FilePart> files) {
		log.debug("File name and Path {}", Paths.get(UPLOAD_ROOT, "logback.xml").toFile().getAbsolutePath());

		// This seems necessary otherwise the transferTo will raise java.nio.file.NoSuchFileException
		try (PrintWriter out = new PrintWriter(Paths.get(UPLOAD_ROOT, "logback.xml").toFile().getAbsoluteFile())) {
			out.println("this is a tes");
		}
		catch (FileNotFoundException e) {
			log.error("File not found", e);
		}
		return files
				.log("CreateImage-before TransferTo")
				.flatMap(file -> file.transferTo(
						Paths.get(UPLOAD_ROOT, file.filename()).toFile()))
				.log("CreateImage-after FlatMap")
				.then()
				.log("CreateImage-after then");
	}

Probably not the most elegant way how I created the PrintWriter, however I wanted to use the same code as much as possible to rule out any problems with the Paths class.

To summarise, the problem seems to occur only if the destination file does not exist. However, according to the documentation of transfertTo it should also work if the destination does not yet exist.

[pbaletkeman]

Given what @digsim has previously posted I think that possibly the underlying issue could be that the UPLOAD_ROOT directory may not exists when the file is file.transferTo() is executed, which is causing the error in question.

[digsim]

UPLOAD_ROOT exists and the log statement in the first line shows, that the folder is at the expected location. The ImageService contains the following code:

	@Bean
CommandLineRunner setUp() throws IOException {
    return (args -> {
        FileSystemUtils.deleteRecursively(new File(UPLOAD_ROOT));
        Files.createDirectory(Paths.get(UPLOAD_ROOT));
        FileCopyUtils.copy("Test file", new FileWriter(UPLOAD_ROOT + "/learning-spring-boot-cover.jpg"));
        FileCopyUtils.copy("Test file2", new FileWriter(UPLOAD_ROOT + "/learning-spring-boot-2nd-edition-cover.jpg"));
        FileCopyUtils.copy("Test file3", new FileWriter(UPLOAD_ROOT + "/bazinga.jpg"));
    });
}

making sure, when accessing the root content, the table is already populated with 3 records ( verified in the console that the directory exists, is not empty and has the right permissions).

Strangely enough, continuing the tutorial leads to an improved version of the createImage():

Mono<Void> copyFile = Mono.just(
    Paths.get(UPLOAD_ROOT, file.filename())
    .toFile())
    .map(destFile -> {
        try{
            destFile.createNewFile();
            return destFile;
        }catch (IOException e){
            throw new RuntimeException(e);
        }
    })
    .flatMap(file::transferTo);

Here we can see, that indeed first createNewFile() is called and only then transferTo() is called. This is basically a more elegant (and obviously a more reactive way :-) ) of doing what I proposed in my previous comment.

Therefore, I guess this is just en error in the textbook.

[gregturn]

Good catch @digsim!

I wonder if the JDK actually has slightly different behavior with transferTo on different platforms.

[gregturn]

For the record, the enhanced version is found in Chapter 3, Reactive Data Access with Spring Boot.

[allensalmassi]

Hello starting with book did the first chapter code

@GetMapping("/chapters")
public Flux listing() {
return repository.findAll();
}

when executing the controller getting the following display only

[{},{},{}]

My sentiment is it has find the three element in the DB but it is not able to display it...the above look like empty json....

these are the three element from LoadDatabase module that have been build and save

                            new Chapter("Quick Start with Java"),
			new Chapter("Reactive Web with Spring Boot"),
			new Chapter("...and more!"))

I truly appreciate the comment on how to solve this issue..I have tried to solve it but do not see what is wrong...

[allensalmassi]

One more thing I added System.out.println as follow to see what it is throwing at me

@GetMapping("/chapters")
public Flux listing() {
System.out.println(
repository.findAll().toString());
return repository.findAll();

I got in my consol. FluxOnErrorResume display

[gregturn]

@adrian110288 First of all, welcome to the code base!

If you haven't figured it out, Flux is a lazy reactive container. The data isn't there...until you subscribe (I try to say this a lot in the book to drive a point home). Hence, a classic toString call doesn't work.

Are you running the updated code base? If you look at the commit history of this project, you'll see that updates have been made here and there to run with the almost latest versions of Spring Boot and Spring Cloud.

[allensalmassi]

Hi Greq
Me again....Let me tell you this once I finished you can put in the back of your back on subsequent version I have taken Spring boot where noman has gone before...

I am in chapter two and I have checked the GitHub and made all necessary change. The change is as follow

I have tried to narrow done it is the return type that does not like it.....Changing the return type and it is happy to proceed....

@PostMapping(API_BASE_PATH + "/images")
Mono<Void> create(@RequestBody Flux<Image> images) {
   
	return images
		.map(image -> {
			log.info("We will save " + image + " to a Reactive database soon!");
			return image;
		})
		.then();
}

However when running I am getting this error :

org.springframework.core.codec.CodecException: Type definition error: [simple type, class com.greglturnquist.learningspringboot.Image]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.greglturnquist.learningspringboot.Image (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: UNKNOWN; line: -1, column: -1]
at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeInternal$0(AbstractJackson2Decoder.java:116) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:100) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:646) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:523) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap$FlatMapInner.onSubscribe(FluxFlatMap.java:897) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:128) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:61) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Flux.subscribe(Flux.java:6873) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:372) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapSignal$FluxMapSignalSubscriber.onNext(FluxMapSignal.java:147) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:108) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:185) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:108) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.ipc.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:211) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.ipc.netty.channel.FluxReceive.request(FluxReceive.java:110) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:149) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeek$PeekSubscriber.request(FluxPeek.java:130) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:149) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapSignal$FluxMapSignalSubscriber.request(FluxMapSignal.java:225) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:332) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapSignal$FluxMapSignalSubscriber.onSubscribe(FluxMapSignal.java:115) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:86) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onSubscribe(FluxPeek.java:163) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:86) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.ipc.netty.channel.FluxReceive.startReceiver(FluxReceive.java:273) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.ipc.netty.channel.FluxReceive.subscribe(FluxReceive.java:124) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.ipc.netty.ByteBufFlux.subscribe(ByteBufFlux.java:242) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.core.publisher.FluxPeek.subscribe(FluxPeek.java:83) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.ipc.netty.ByteBufFlux.subscribe(ByteBufFlux.java:242) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapSignal.subscribe(FluxMapSignal.java:69) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxFlatMap.subscribe(FluxFlatMap.java:97) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxOnErrorResume.subscribe(FluxOnErrorResume.java:47) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty.subscribe(FluxSwitchIfEmpty.java:45) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreElements.subscribe(MonoIgnoreElements.java:37) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:73) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onNext(MonoIgnoreThen.java:290) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:241) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:323) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1630) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:138) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:312) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:172) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3080) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:148) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:271) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:803) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:115) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1630) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1444) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1318) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3080) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:418) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:210) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:128) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:61) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:108) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replayNormal(FluxReplay.java:808) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxReplay$SizeBoundReplayBuffer.replay(FluxReplay.java:892) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.ReplayProcessor$ReplayInner.request(ReplayProcessor.java:561) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:149) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:86) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.ReplayProcessor.subscribe(ReplayProcessor.java:315) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Flux.subscribe(Flux.java:6873) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoProcessor.subscribe(MonoProcessor.java:434) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoMap.subscribe(MonoMap.java:55) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3080) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:167) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
at reactor.ipc.netty.channel.ChannelOperations.applyHandler(ChannelOperations.java:381) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at reactor.ipc.netty.http.server.HttpServerOperations.onHandlerStart(HttpServerOperations.java:397) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_171]
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.greglturnquist.learningspringboot.Image (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: UNKNOWN; line: -1, column: -1]
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1451) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1027) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1290) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:326) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:1574) ~[jackson-databind-2.9.5.jar:2.9.5]
at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:965) ~[jackson-databind-2.9.5.jar:2.9.5]
at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeInternal$0(AbstractJackson2Decoder.java:113) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
... 120 common frames omitted