Upload file does not work

[hantsy]

Try to use the following codes to upload a file, failed.

And from the source codes of graphql-java-kickstart /graphql-spring-webclient, I also can not find an example of file upload.

  var query = "fileupload.gql";
  var file = new ClassPathResource("/test.txt").getInputStream();
 // log.info("file: {}", file);
  var result = graphQLWebClient.post(
          query,
          Map.of("file", file),
          Boolean.class)
          .block();
  log.info("file upload result: {}", result);

And get the following exceptions.

Caused by: org.springframework.core.codec.CodecException: Type definition error: [simple type, class java.io.BufferedInputStream]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class java.io.BufferedInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: graphql.kickstart.spring.webclient.boot.GraphQLRequestBody["variables"]->java.util.ImmutableCollections$Map1["file"])
	at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:226) ~[spring-web-5.3.8.jar:5.3.8]
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ Request to POST null [DefaultWebClient]
Stack trace:
		at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:226) ~[spring-web-5.3.8.jar:5.3.8]
		at org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$0(AbstractJackson2Encoder.java:150) ~[spring-web-5.3.8.jar:5.3.8]
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:113) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.MonoSingle$SingleSubscriber.doOnRequest(MonoSingle.java:103) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.Operators$MonoInnerProducerBase.request(Operators.java:2730) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.MonoSingle$SingleSubscriber.onSubscribe(MonoSingle.java:115) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.netty.http.client.HttpClientConnect$HttpIOHandlerObserver.onStateChange(HttpClientConnect.java:425) ~[reactor-netty-http-1.0.7.jar:1.0.7]
		at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:654) ~[reactor-netty-core-1.0.7.jar:1.0.7]
		at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.run(DefaultPooledConnectionProvider.java:288) ~[reactor-netty-core-1.0.7.jar:1.0.7]
		at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
		at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
		at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) ~[netty-transport-4.1.65.Final.jar:4.1.65.Final]
		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
		at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na]
	Suppressed: java.lang.Exception: #block terminated with an error
		at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99) ~[reactor-core-3.4.6.jar:3.4.6]
		at reactor.core.publisher.Mono.block(Mono.java:1703) ~[reactor-core-3.4.6.jar:3.4.6]
		at com.example.demo.DemoApplication.run(DemoApplication.java:68) ~[main/:na]
		at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:782) ~[spring-boot-2.5.1.jar:2.5.1]
		at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:772) ~[spring-boot-2.5.1.jar:2.5.1]
		at org.springframework.boot.SpringApplication.run(SpringApplication.java:345) ~[spring-boot-2.5.1.jar:2.5.1]
		at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:144) ~[spring-boot-2.5.1.jar:2.5.1]
		at com.example.demo.DemoApplication.main(DemoApplication.java:27) ~[main/:na]
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class java.io.BufferedInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: graphql.kickstart.spring.webclient.boot.GraphQLRequestBody["variables"]->java.util.ImmutableCollections$Map1["file"])
	at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1276) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:400) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:808) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:764) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1514) ~[jackson-databind-2.12.3.jar:2.12.3]
	at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1006) ~[jackson-databind-2.12.3.jar:2.12.3]
	at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:222) ~[spring-web-5.3.8.jar:5.3.8]
	at org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$0(AbstractJackson2Encoder.java:150) ~[spring-web-5.3.8.jar:5.3.8]
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:113) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.MonoSingle$SingleSubscriber.doOnRequest(MonoSingle.java:103) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.Operators$MonoInnerProducerBase.request(Operators.java:2730) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.MonoSingle$SingleSubscriber.onSubscribe(MonoSingle.java:115) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
	at reactor.netty.http.client.HttpClientConnect$HttpIOHandlerObserver.onStateChange(HttpClientConnect.java:425) ~[reactor-netty-http-1.0.7.jar:1.0.7]
	at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:654) ~[reactor-netty-core-1.0.7.jar:1.0.7]
	at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.run(DefaultPooledConnectionProvider.java:288) ~[reactor-netty-core-1.0.7.jar:1.0.7]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) ~[netty-transport-4.1.65.Final.jar:4.1.65.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.65.Final.jar:4.1.65.Final]
	at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na]


Process finished with exit code 1

[tarunk1612]

@hantsy Did you find any solution around this ?