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  1. @GetMapping("/events")
  2. public Mono<ServerResponse> getEvents() {
  3. return ServerResponse.ok()
  4. .contentType(APPLICATION_JSON)
  5. .build();
  6. }
  7.  
  8. org.springframework.core.codec.CodecException: Type definition error: [simple type, class org.springframework.web.reactive.function.server.DefaultServerResponseBuilder$WriterFunctionServerResponse]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.web.reactive.function.server.DefaultServerResponseBuilder$WriterFunctionServerResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
  9. at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:162) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  10. at org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$0(AbstractJackson2Encoder.java:119) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  11. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  12. at reactor.core.publisher.FluxJust$WeakScalarSubscription.request(FluxJust.java:91) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  13. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  14. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1444) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  15. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1318) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  16. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  17. at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  18. at reactor.core.publisher.FluxMapFuseable.subscribe(FluxMapFuseable.java:63) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  19. at reactor.core.publisher.Flux.subscribe(Flux.java:6873) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  20. at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:200) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  21. at reactor.core.publisher.FluxConcatArray.subscribe(FluxConcatArray.java:80) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  22. at reactor.core.publisher.Flux.subscribe(Flux.java:6873) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  23. at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:200) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  24. at reactor.core.publisher.FluxConcatArray.subscribe(FluxConcatArray.java:80) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  25. at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:59) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  26. at reactor.core.publisher.FluxContextStart.subscribe(FluxContextStart.java:49) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  27. at reactor.core.publisher.Flux.subscribe(Flux.java:6873) ~[reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  28. at reactor.ipc.netty.channel.ChannelOperationsHandler.drain(ChannelOperationsHandler.java:461) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  29. at reactor.ipc.netty.channel.ChannelOperationsHandler.flush(ChannelOperationsHandler.java:191) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  30. at io.netty.channel.AbstractChannelHandlerContext.invokeFlush0(AbstractChannelHandlerContext.java:776) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  31. at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:802) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  32. at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  33. at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  34. at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  35. at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1071) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  36. at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:300) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  37. at reactor.ipc.netty.NettyOutbound.lambda$sendObject$6(NettyOutbound.java:298) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  38. at reactor.ipc.netty.FutureMono$DeferredFutureMono.subscribe(FutureMono.java:134) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  39. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  40. at reactor.ipc.netty.NettyOutbound.subscribe(NettyOutbound.java:356) ~[reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  41. at reactor.core.publisher.FluxConcatMap$ConcatMapDelayed.drain(FluxConcatMap.java:749) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  42. at reactor.core.publisher.FluxConcatMap$ConcatMapDelayed.onNext(FluxConcatMap.java:581) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  43. at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:108) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  44. at org.springframework.http.server.reactive.ChannelSendOperator$WriteBarrier.emitCachedSignals(ChannelSendOperator.java:282) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  45. at org.springframework.http.server.reactive.ChannelSendOperator$WriteBarrier.request(ChannelSendOperator.java:264) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  46. at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:149) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  47. at reactor.core.publisher.FluxConcatMap$ConcatMapDelayed.onSubscribe(FluxConcatMap.java:567) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  48. at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:86) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  49. at org.springframework.http.server.reactive.ChannelSendOperator$WriteBarrier.subscribe(ChannelSendOperator.java:317) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  50. at reactor.core.publisher.FluxSource.subscribe(FluxSource.java:52) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  51. at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  52. at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  53. at reactor.core.publisher.MonoIgnoreElements.subscribe(MonoIgnoreElements.java:37) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  54. at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:148) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  55. at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  56. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  57. at reactor.core.publisher.FluxConcatIterable$ConcatIterableSubscriber.onComplete(FluxConcatIterable.java:141) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  58. at reactor.core.publisher.FluxConcatIterable.subscribe(FluxConcatIterable.java:60) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  59. at reactor.core.publisher.MonoIgnoreElements.subscribe(MonoIgnoreElements.java:37) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  60. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  61. at org.springframework.http.server.reactive.ChannelSendOperator$WriteBarrier.onNext(ChannelSendOperator.java:181) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  62. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:115) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  63. at reactor.core.publisher.FluxJust$WeakScalarSubscription.request(FluxJust.java:91) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  64. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  65. at org.springframework.http.server.reactive.ChannelSendOperator$WriteBarrier.onSubscribe(ChannelSendOperator.java:163) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  66. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  67. at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  68. at reactor.core.publisher.FluxMapFuseable.subscribe(FluxMapFuseable.java:63) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  69. at org.springframework.http.server.reactive.ChannelSendOperator.subscribe(ChannelSendOperator.java:74) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  70. at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  71. at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  72. at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  73. at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  74. at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:73) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  75. at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  76. at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:198) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  77. at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  78. at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onNext(MonoIgnoreThen.java:290) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  79. at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  80. at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  81. at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1073) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  82. at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:241) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  83. at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:323) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  84. at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:185) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  85. at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:92) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  86. at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  87. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:115) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  88. at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1630) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  89. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  90. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1444) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  91. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1318) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  92. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  93. at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  94. at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  95. at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  96. at reactor.core.publisher.MonoDefaultIfEmpty.subscribe(MonoDefaultIfEmpty.java:37) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  97. at reactor.core.publisher.MonoPeek.subscribe(MonoPeek.java:71) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  98. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  99. at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  100. at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  101. at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  102. at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:148) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  103. at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  104. at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  105. at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  106. at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  107. at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  108. at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  109. at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  110. at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:271) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  111. at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:803) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  112. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:115) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  113. at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1630) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  114. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:156) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  115. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1444) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  116. at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1318) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  117. at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  118. at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  119. at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  120. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  121. at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:418) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  122. at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:210) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  123. at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:128) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  124. at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:61) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  125. at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  126. at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  127. at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  128. at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  129. at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  130. at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  131. at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  132. at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  133. at reactor.core.publisher.Mono.subscribe(Mono.java:3080) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  134. at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:167) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  135. at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  136. at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  137. at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.1.6.RELEASE.jar:3.1.6.RELEASE]
  138. at reactor.ipc.netty.channel.ChannelOperations.applyHandler(ChannelOperations.java:381) [reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  139. at reactor.ipc.netty.http.server.HttpServerOperations.onHandlerStart(HttpServerOperations.java:397) [reactor-netty-0.7.6.RELEASE.jar:0.7.6.RELEASE]
  140. at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:163) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
  141. at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
  142. at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
  143. at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) ~[netty-transport-4.1.23.Final.jar:4.1.23.Final]
  144. at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
  145. at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_141]
  146. Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.web.reactive.function.server.DefaultServerResponseBuilder$WriterFunctionServerResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
  147. at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77) ~[jackson-databind-2.9.5.jar:2.9.5]
  148. at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1191) ~[jackson-databind-2.9.5.jar:2.9.5]
  149. at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:312) ~[jackson-databind-2.9.5.jar:2.9.5]
  150. at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71) ~[jackson-databind-2.9.5.jar:2.9.5]
  151. at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33) ~[jackson-databind-2.9.5.jar:2.9.5]
  152. at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) ~[jackson-databind-2.9.5.jar:2.9.5]
  153. at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319) ~[jackson-databind-2.9.5.jar:2.9.5]
  154. at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1396) ~[jackson-databind-2.9.5.jar:2.9.5]
  155. at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:913) ~[jackson-databind-2.9.5.jar:2.9.5]
  156. at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:159) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
  157. ... 136 common frames omitted
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