Feign.codec.EncodeException: Fehler beim Konvertieren des Anforderungstexts ⇐ Java

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Es wurde versucht, eine Datei per Rest-Anfrage mit MultiPartFile hochzuladen. Abrufen der Anforderung im Controller in App A, der den Dienst aufruft, der dann FeignClient aufruft, um einen anderen REST-Endpunkt in App B aufzurufen.
Controller-Klasse

Code: Select all

@RestController("strategy")
@Validated
public class StrategyController {
private final StrategyService strategyService;

public StrategyController(StrategyService strategyService) {
this.strategyService = strategyService;
}

@RequestMapping(path = ASSORT_STRAT_UPLOAD_REQUEST, method = RequestMethod.POST)
public ResponseEntity upload(MultipartFile file) {
return ResponseEntity.ok(strategyService.upload(file));
}

Dienstklasse

Code: Select all

@Service
public class StrategyServiceImpl implements StrategyService {
private final strategyServiceRestClient strategyServiceRestClient;

public StrategyServiceImpl(strategyServiceRestClient strategyServiceRestClient) {
this.strategyServiceRestClient = strategyServiceRestClient;
}

@Override
public String upload(MultipartFile file) {
return strategyServiceRestClient.uploadRequest(file);
}
}

Feign Client

Code: Select all

@FeignClient(value = "strategy", url = "${strategy-service-url}", configuration = StrategyServiceFeignConfig.class)
public interface StrategyServiceRestClient {
@RequestMapping(method = RequestMethod.POST, value = KimsBffConstants.ASSORT_STRAT_UPLOAD_REQUEST)
@HandleFeignException(HandleFeignClientException.class)
String uploadRequest(@RequestPart MultipartFile file);
}

Beim Aufruf von strategyServiceRestClient.uploadRequest(file) wird die folgende Ausnahme angezeigt.
Verursacht durch:

Code: Select all

java.io.FileNotFoundException: MultipartFile resource [file] cannot be resolved to URL
at org.springframework.core.io.AbstractResource.getURL(AbstractResource.java:113)
at org.springframework.core.io.AbstractResource.getURI(AbstractResource.java:123)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:689)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:869)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:760)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400)
at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1514)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1007)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:456)
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:104)
at org.springframework.cloud.openfeign.support.SpringEncoder.checkAndWrite(SpringEncoder.java:217)
at org.springframework.cloud.openfeign.support.SpringEncoder.encodeWithMessageConverter(SpringEncoder.java:146)

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