spring-solr-data showcase示例項目中的異常

Question

在spring data solr showcase（github link）中啓動solr搜索示例時出現此異常。我正在使用solr：6.1.0和默認集合gettingstarted，其中已將xml文件放在solr的exampledocs目錄中。

java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null 
    org.springframework.util.Assert.notNull(Assert.java:112) 
    org.springframework.util.Assert.notNull(Assert.java:123) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$SolrPropertyValueProvider.readValue(MappingSolrConverter.java:321) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$SolrPropertyValueProvider.readCollection(MappingSolrConverter.java:439) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$SolrPropertyValueProvider.readValue(MappingSolrConverter.java:335) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$SolrPropertyValueProvider.readValue(MappingSolrConverter.java:312) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$SolrPropertyValueProvider.getPropertyValue(MappingSolrConverter.java:298) 
    org.springframework.data.solr.core.convert.MappingSolrConverter.getValue(MappingSolrConverter.java:151) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$1.doWithPersistentProperty(MappingSolrConverter.java:138) 
    org.springframework.data.solr.core.convert.MappingSolrConverter$1.doWithPersistentProperty(MappingSolrConverter.java:130) 
    org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:261) 
    org.springframework.data.solr.core.convert.MappingSolrConverter.read(MappingSolrConverter.java:130) 
    org.springframework.data.solr.core.convert.MappingSolrConverter.read(MappingSolrConverter.java:117) 
    org.springframework.data.solr.core.convert.MappingSolrConverter.read(MappingSolrConverter.java:92) 
    org.springframework.data.solr.core.SolrTemplate.convertSolrDocumentListToBeans(SolrTemplate.java:406) 
    org.springframework.data.solr.core.SolrTemplate.convertQueryResponseToBeans(SolrTemplate.java:398) 
    org.springframework.data.solr.core.SolrTemplate.queryForPage(SolrTemplate.java:277) 
    org.springframework.data.solr.repository.support.SimpleSolrRepository.findAll(SimpleSolrRepository.java:112) 
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    java.lang.reflect.Method.invoke(Method.java:497) 
    org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:358) 
    org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:343) 
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) 
    org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) 
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) 
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) 
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) 
    org.springframework.data.solr.showcase.product.$Proxy62.findAll(Unknown Source) 
    org.springframework.data.solr.showcase.product.ProductServiceImpl.findByName(ProductServiceImpl.java:46) 
    org.springframework.data.solr.showcase.product.web.SearchController.search(SearchController.java:55) 
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    java.lang.reflect.Method.invoke(Method.java:497) 
    org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215) 
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) 
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) 
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749) 
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689) 
    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:620) 
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) 
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108) 

Answer 1

使用較新的春天引導和Solr的版本，請看看在branch，檢查自述文件中的Running Showcase (Solr 5)部分。對於Solr 6應該是相同的程序。