【问题标题】：whitespace content allowed before start tag and not { (position: START_DOCUMENT seen {... @1:1) , errorCode='AXONIQ-5001在开始标记之前允许空白内容，而不是 { (position: START_DOCUMENT seen {... @1:1) , errorCode='AXONIQ-5001
【发布时间】：2021-08-03 15:03:54
【问题描述】：

 I have two service service1 and service2 .In service2 QueryHandler is there and if i will run only service2 QueryHandler working but if I am calling this QueryHandler in service1 then not working and both service are running in axon server but while calling service2 queryhandler in service1 I am getting below error.

java.util.concurrent.CompletionException：org.axonframework.queryhandling.QueryExecutionException：原因：AxonServerRemoteQueryHandlingException{message=远程消息处理组件抛出异常：由开始标记之前只允许空白内容而不是 { (position: START_DOCUMENT seen {... @1:1) , errorCode='AXONIQ-5001', location='10712@INN1FJ2WZ2'} 在 org.axonframework.axonserver.connector.ErrorCode.lambda$static$15(ErrorCode.java:107)

服务1

 @Autowired
private QueryGateway queryGateway;
TXodsFetchDocumentDetails fetchDocumentDetails = TXodsFetchDocumentDetails.builder()
                                                            .transactionReference(res.getEventHeader().getTransactionTrackingDetails().getStepDetails().getTxTransactionDetails().getTransactionReference())
                                                            .stepNumber(res.getEventHeader().getTransactionTrackingDetails().getStepDetails().getStepNumber())
                                                            .build();

        
            TXOdsDocumentObjectList tXOdsDocumentObjectList1=queryGateway
                    .query(fetchDocumentDetails, TXOdsDocumentObjectList.class).join();//here throwing exception

服务2

@QueryHandler
    public TXOdsDocumentObjectList handle(TXodsFetchDocumentDetails fetchDocumentDetails) {
        log.info("Retrieve all document details request ", fetchDocumentDetails.getTransactionReference(),fetchDocumentDetails.getStepNumber());
        List<TXOdsDocumentObject> documentObjectList = repository
                .findByEventHeader_TransactionTrackingDetails_StepDetails_TxTransactionDetails_TransactionReferenceAndEventHeader_TransactionTrackingDetails_StepDetails_StepNumber(
                        fetchDocumentDetails.getTransactionReference(), fetchDocumentDetails.getStepNumber());
        return TXOdsDocumentObjectList.builder().documentObjectList(documentObjectList).build();
    }

我是 AXON 框架的新手，请帮我解决问题。

【问题讨论】：

标签： java spring-boot axon-framework

【解决方案1】：

也许您应该检查 application.properties 中的序列化器配置，确保查询命令发送组件使用与接收 (QueryHandler) 组件相同的 XStream(XML)/Jackson(Json) 序列化器，如下所示：

axon.serializer.messages=jackson

我最近通过这样做修复了这样一个错误，希望它可以给你一些线索

【讨论】：