Java org.springframework.dao.IncorrectResultSizeDataAccessException:在JpaRepository中使用@Async时

以下是我的存储库类：

public interface VitalRepo extends JpaRepository<Vitals, Integer> {

    @Async
    Future<List<Vitals>> findByType(int type);

    @Async
    @Query("SELECT pv FROM PatientVitals pv WHERE pv.accountId=:accountId")
    Future<List<PatientVitals>> getPatientVitals(@Param("accountId") int accountId);

    @Async
    @Query("SELECT vu FROM VitalUnits vu INNER JOIN vu.vitals v WHERE v.type=1")
    Future<List<VitalUnits>> getAllUnits();

}

公共界面VitalReporto扩展了JPA存储{
@异步的
未来findByType（int型）；
@异步的
@查询（“从PatientVitals pv中选择pv，其中pv.accountId=：accountId”）
未来的getPatientVitals（@Param（“accountId”）int accountId）；
@异步的
@查询（“选择vu FROM VitalUnits vu internal JOIN vu.vitals v，其中v.type=1”）
未来的getAllUnits（）；
}

下面是我如何调用这些方法

Future<List<Vitals>> vitalsTask = vitalRepo.findByType(1);
Future<List<PatientVitals>> patientVitalsTask = vitalRepo.getPatientVitals(accountId);
Future<List<VitalUnits>> allUnitsTask = vitalRepo.getAllUnits();

List<Vitals> vitals;
List<PatientVitals> patientVitals;
List<VitalUnits> allUnits;

while (true) {
    if (vitalsTask.isDone() && patientVitalsTask.isDone() && allUnitsTask.isDone()) {
        vitals = vitalsTask.get();
        patientVitals = patientVitalsTask.get();
        allUnits = allUnitsTask.get();
        break;
    }
}

Future vitaltask=vitalRepo.findByType（1）；
Future PatientVitalTask=VitalReporto.getPatientVitals（accountId）；
Future allUnitsTask=vitalRepo.getAllUnits（）；
列出生命体征；
列出病人的基本情况；
列出冲积物；
while（true）{
if（vitalTask.isDone（）&&patientvitalTask.isDone（）&&allUnitsTask.isDone（））{
vitals=vitalTask.get（）；
patientVitals=PatientVitalTask.get（）；
allUnits=allUnitsTask.get（）；
打破
}
}

如果我不使用async，一切都正常。但当我使用它时，我会遇到以下异常：

02-07-2017 22:03:56 ERROR Logger:27 - throwed exception--
org.springframework.dao.IncorrectResultSizeDataAccessException: result returns more than one elements; nested exception is javax.persistence.NonUniqueResultException: result returns more than one elements
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:395)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:156)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:417)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy598.findByType(Unknown Source)
    at com.cinch.gch.v2.service.VitalsService.getManageVitals(VitalsService.java:51)
    at com.cinch.gch.v2.service.VitalsService$$FastClassByCGLIB$$97b9493.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:642)
    at com.cinch.gch.v2.service.VitalsService$$EnhancerByCGLIB$$18514567.getManageVitals(<generated>)
    at com.cinch.gch.v2.controller.VitalsController.getManageVitals(VitalsController.java:33)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.NonUniqueResultException: result returns more than one elements
    at org.hibernate.jpa.internal.QueryImpl.getSingleResult(QueryImpl.java:505)
    at org.hibernate.jpa.criteria.compile.CriteriaQueryTypeQueryAdapter.getSingleResult(CriteriaQueryTypeQueryAdapter.java:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:328)
    at com.sun.proxy.$Proxy610.getSingleResult(Unknown Source)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:142)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:61)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:95)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:85)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:323)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    ... 51 more

02-07-2017 22:03:56错误记录器：27-抛出异常--
org.springframework.dao.incorrectresultsizedaataaccessexception：结果返回多个元素；嵌套异常为javax.persistence.UnuniquereSultException：结果返回多个元素
在org.springframework.orm.jpa.EntityManagerFactoryUtils.ConvertJPAAccessExceptionIffailable（EntityManagerFactoryUtils.java:395）上
如果可能，请访问org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateException（HibernateJpaDialect.java:156）
位于org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.TranslateExceptionIffailable（AbstractEntityManagerFactoryBean.java:417）
在org.springframework.dao.support.ChainedPersistenceExceptionTranslator.TranslateExceptionIfEnabled（ChainedPersistenceExceptionTranslator.java:59）
位于org.springframework.dao.support.DataAccessUtils.translateIfNecessary（DataAccessUtils.java:213）
位于org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke（PersistenceExceptionTranslationInterceptor.java:147）
在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:179）上
位于org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$lockmodepopulatingmethodinterceptor.invoke（LockModeRepositoryPostProcessor.java:92）
在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:179）上
位于org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke（ExposeInvocationInterceptor.java:92）
在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:179）上
位于org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:207）
位于com.sun.proxy.$Proxy598.findByType（未知源）
在com.cinch.gch.v2.service.vitalservice.getManageVitals（vitalservice.java:51）
在com.cinch.gch.v2.service.vitalservice$$FastClassByCGLIB$$97b9493.invoke（）上
位于org.springframework.cglib.proxy.MethodProxy.invoke（MethodProxy.java:204）
位于org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept（CglibAopProxy.java:642）
在com.cinch.gch.v2.service.vitalservice$$enhancerbyglib$$18514567.getManageVitals（）上
在com.cinch.gch.v2.controller.VitalsController.getManageVitals（VitalsController.java:33）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:498）
位于org.springframework.web.method.support.InvocableHandlerMethod.invoke（InvocableHandlerMethod.java:214）
位于org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:132）
位于org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:104）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod（RequestMappingHandlerAdapter.java:748）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:689）
位于org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:83）
位于org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:945）
位于org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:876）
位于org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:931）
位于org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:822）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:622）
位于org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:807）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:729）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:230）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:165）
位于org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:192）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:165）
位于org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:198）
位于org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:108）
位于org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:140）
在org.apache.catalina.valves.E