[WebFlux] Bad Request 400 Failed to read HTTP message. Post 대용량 Body 전송 에러

 

Error

Http Post Method를 통해 Body에 큰 크기의 데이터를 실어 보낼 경우 아래와 같은 에러가 발생함.

{
    "type":"about:blank",
    "title":"Bad Request",
    "status":400,"detail":"Failed to read HTTP message",
    "instance":"/your/path"
}

 

 

 

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---

 

Solution

나의 경우 AbstractMessageReaderArgumentResolver에서 해당 메시지를 볼 수 있었고, 디버깅하여 에러를 찍어보니 다음과 같았음.

 

org.springframework.core.codec.DecodingException: JSON decoding error: String length (20051112) exceeds the maximum length (20000000)
	at org.springframework.http.codec.json.AbstractJackson2Decoder.processException(AbstractJackson2Decoder.java:275)
	Suppressed: The stacktrace has been enhanced by Reactor, refer to additional information below: 
Assembly trace from producer [reactor.core.publisher.MonoFlatMap] :
	reactor.core.publisher.Mono.flatMap
	org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeToMono$3(AbstractJackson2Decoder.java:190)
Error has been observed at the following site(s):
	*__________Mono.flatMap ⇢ at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeToMono$3(AbstractJackson2Decoder.java:190)
	*__Mono.deferContextual ⇢ at org.springframework.http.codec.json.AbstractJackson2Decoder.decodeToMono(AbstractJackson2Decoder.java:185)
	|_                      ⇢ at org.springframework.http.codec.DecoderHttpMessageReader.readMono(DecoderHttpMessageReader.java:111)
	|_                      ⇢ at org.springframework.http.codec.DecoderHttpMessageReader.readMono(DecoderHttpMessageReader.java:155)
Original Stack Trace:
		at org.springframework.http.codec.json.AbstractJackson2Decoder.processException(AbstractJackson2Decoder.java:275)
		at org.springframework.http.codec.json.AbstractJackson2Decoder.decode(AbstractJackson2Decoder.java:211)
		at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeToMono$2(AbstractJackson2Decoder.java:191)
		at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:132)
		at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
		at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:299)
		at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)
		at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)
		at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
		at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onComplete(FluxPeekFuseable.java:277)
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
		at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:415)
		at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:446)
		at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:689)
		at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:114)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
		at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:286)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
		at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
		at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
		at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
		at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
		at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
		at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
		at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
		at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
		at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
		at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: String length (20051112) exceeds the maximum length (20000000) (through reference chain: com.contents.cus.domain.dto.rest.ContentsServerRequestDto["contentsData"])
	at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:402)
	at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:361)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.wrapAndThrow(BeanDeserializerBase.java:1863)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:394)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:185)
	at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:323)
	at com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:2105)
	at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1481)
	at org.springframework.http.codec.json.AbstractJackson2Decoder.decode(AbstractJackson2Decoder.java:206)
	at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeToMono$2(AbstractJackson2Decoder.java:191)
	at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:132)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)
	at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:299)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)
	at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)
	at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)
	at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
	at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onComplete(FluxPeekFuseable.java:277)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:549)
	at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:415)
	at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:446)
	at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:689)
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:114)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:286)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
	at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: com.fasterxml.jackson.core.exc.StreamConstraintsException: String length (20051112) exceeds the maximum length (20000000)
	at com.fasterxml.jackson.core.StreamReadConstraints.validateStringLength(StreamReadConstraints.java:324)
	at com.fasterxml.jackson.core.util.ReadConstrainedTextBuffer.validateStringLength(ReadConstrainedTextBuffer.java:27)
	at com.fasterxml.jackson.core.util.TextBuffer.finishCurrentSegment(TextBuffer.java:939)
	at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._finishString2(UTF8StreamJsonParser.java:2584)
	at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._finishAndReturnString(UTF8StreamJsonParser.java:2560)
	at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.getText(UTF8StreamJsonParser.java:335)
	at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:42)
	at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:11)
	at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:392)
	... 56 more

 

 

JSON decoding error: String length (20051112) exceeds the maximum length (20000000)

 

MAX 크기가 설정되어 있는 것 같다.

 

원래는 분명 100MB 넘게도 요청되는걸 확인 했었는데 갑자기 안돼서 찾아보니 SpringBoot 버전업 하면서 Jackson 라이브러리 버전업도 함께 업그레이드가 됐는데 해당 버전에 데이터 최대 크기를 위한 기본 설정이 추가된 듯함.

 

https://github.com/FasterXML/jackson-core/issues/863

Add `StreamReadConstraints` limit for longest textual value to allow (default: 5M) · Issue #863 · FasterXML/jackson-core

 

위 링크는 Jackson설정을 추가하기 위해서 아래와 같이 해결하였는데

ObjectMapper objectMapper = ...;
StreamReadConstraints streamReadConstraints = StreamReadConstraints
    .builder()
    .maxStringLength(Integer.MAX_VALUE)
    .build();
objectMapper.getFactory().setStreamReadConstraints(streamReadConstraints);

 

 

SpringBoot에서는 아래와 같이 JacksonConfig를 추가해서 ObjectMapper를 Bean으로 설정하고 Spring에서 이 Bean을 사용하도록 설정하면 정상동작 함.

 

public class JacksonConfig {

    @Bean
    @Primary
    ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();

        StreamReadConstraints streamReadConstraints = StreamReadConstraints
                .builder()
                .maxStringLength(Integer.MAX_VALUE)
                .build();
        objectMapper.getFactory().setStreamReadConstraints(streamReadConstraints);

        return objectMapper;
    }
}

 

 

끝.

 

 

 

 

추가로 WebFlux에서 메모리 문제 방지를 위해 메모리 버퍼를 제한하는데 버퍼 크기를 늘리기 위한 방법은 아래 링크 참고하면 됨.

https://momobob.tistory.com/116

[WebFlux] Server Request Message Limit , Memory Buffer Size

 

 

 

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Thank you!