Question

我使用的是Neo4j 2.1.6和Spring Data Neo4j 3.2.1。我一直在使用Neo4j 2.1.6（即从早期版本的Neo迁移过来）。

我遇到了一个间歇性的问题，当我尝试做一个MATCH语句时，例如

MATCH (p:Profile) WHERE p.username = 'abc123' RETURN p

我得到了一个EntityNotFoundException，比如说，

Node with id 25393

一些类似的MATCH查询会返回类似的结果。

我注意到找不到的ID大于数据库中的最大内部节点ID。

我不确定它是什么，因为它是断断续续的。

非常感谢任何有关此事的帮助。

示例堆栈跟踪如下：

</pre><p><b>root cause</b></p><pre>org.neo4j.graphdb.NotFoundException: Node 25393 not found
org.neo4j.kernel.impl.core.NodeManager.getNodeById(NodeManager.java:323)
org.neo4j.kernel.InternalAbstractGraphDatabase.getNodeById(InternalAbstractGraphDatabase.java:1177)
org.neo4j.cypher.internal.spi.v2_1.TransactionBoundQueryContext$NodeOperations.getById(TransactionBoundQueryContext.scala:161)
org.neo4j.cypher.internal.spi.v2_1.TransactionBoundQueryContext$$anonfun$getNodesByLabel$1.apply(TransactionBoundQueryContext.scala:135)
org.neo4j.cypher.internal.spi.v2_1.TransactionBoundQueryContext$$anonfun$getNodesByLabel$1.apply(TransactionBoundQueryContext.scala:135)
org.neo4j.cypher.internal.helpers.JavaConversionSupport$$anon$2.next(JavaConversionSupport.scala:33)
scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
scala.collection.Iterator$$anon$13.next(Iterator.scala:372)
scala.collection.Iterator$$anon$14.hasNext(Iterator.scala:389)
scala.collection.Iterator$class.foreach(Iterator.scala:727)
scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
org.neo4j.cypher.internal.compiler.v2_1.pipes.EagerAggregationPipe.internalCreateResults(EagerAggregationPipe.scala:78)
org.neo4j.cypher.internal.compiler.v2_1.pipes.PipeWithSource.createResults(Pipe.scala:105)
org.neo4j.cypher.internal.compiler.v2_1.pipes.PipeWithSource.createResults(Pipe.scala:102)
org.neo4j.cypher.internal.compiler.v2_1.pipes.PipeWithSource.createResults(Pipe.scala:102)
org.neo4j.cypher.internal.compiler.v2_1.pipes.PipeWithSource.createResults(Pipe.scala:102)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1$$anonfun$apply$2.apply(ExecutionPlanBuilder.scala:120)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1$$anonfun$apply$2.apply(ExecutionPlanBuilder.scala:119)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionWorkflowBuilder.runWithQueryState(ExecutionPlanBuilder.scala:168)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1.apply(ExecutionPlanBuilder.scala:118)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1.apply(ExecutionPlanBuilder.scala:103)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anon$1.execute(ExecutionPlanBuilder.scala:68)
org.neo4j.cypher.internal.compiler.v2_1.executionplan.ExecutionPlanBuilder$$anon$1.execute(ExecutionPlanBuilder.scala:67)
org.neo4j.cypher.internal.ExecutionPlanWrapperForV2_1.execute(CypherCompiler.scala:159)
org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:76)
org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:71)
org.neo4j.cypher.javacompat.ExecutionEngine.execute(ExecutionEngine.java:84)
org.springframework.data.neo4j.support.query.CypherQueryEngineImpl.parseAndExecuteQuery(CypherQueryEngineImpl.java:70)
org.springframework.data.neo4j.support.query.CypherQueryEngineImpl.query(CypherQueryEngineImpl.java:58)
org.springframework.data.neo4j.repository.query.GraphRepositoryQuery.dispatchQuery(GraphRepositoryQuery.java:107)
org.springframework.data.neo4j.repository.query.GraphRepositoryQuery$1.doWithGraph(GraphRepositoryQuery.java:89)
org.springframework.data.neo4j.support.Neo4jTemplate.doExecute(Neo4jTemplate.java:457)
org.springframework.data.neo4j.support.Neo4jTemplate.access$000(Neo4jTemplate.java:87)
org.springframework.data.neo4j.support.Neo4jTemplate$2.doInTransaction(Neo4jTemplate.java:471)
org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
org.springframework.data.neo4j.support.Neo4jTemplate.exec(Neo4jTemplate.java:468)
org.springframework.data.neo4j.repository.query.GraphRepositoryQuery.execute(GraphRepositoryQuery.java:83)
org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:421)
org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:381)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy78.usernameExists(Unknown Source)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:201)
com.sun.proxy.$Proxy79.usernameExists(Unknown Source)
com.theapp.dao.impl.UserDAOImpl.usernameExists(UserDAOImpl.java:181)
com.theapp.service.impl.RegistrationServiceImpl.registerUserAccount(RegistrationServiceImpl.java:45)
com.theapp.facade.impl.UserFacadeImpl.registerUser(UserFacadeImpl.java:137)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy171.registerUser(Unknown Source)
com.theapp.controllers.AuthController.registration(AuthController.java:57)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
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:781)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:721)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
com.theapp.security.CustomAuthenticationProcessingFilter.doFilter(CustomAuthenticationProcessingFilter.java:101)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter.doFilter(AbstractPreAuthenticatedProcessingFilter.java:94)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)

Answer 1

您似乎没有:Profile(username)

的索引

所以Neo（Cypher）必须扫描所有：Profile节点，其中一些节点可能同时被删除。所以Cypher从索引中读取id，之后节点被删除，之后它才尝试加载具有该id的节点进行属性比较，但它已经消失了。

我认为它是在更新版本的Neo4j中解决的，但我不确定。

Answer 2

我们在Neo4j 2.2.3和Spring Data 3.3.1上遇到了类似的问题。

根据您对Michael的回答的评论，听起来您在username属性上有一个索引。我们使用Neo4j浏览器中的schema验证了我们有一个针对“username”的模式索引。似乎索引有点被破坏了。我通过运行相同的查询验证了这一点，但有几个曲折绕过索引：

MATCH (p:Profile) USING SCAN p:Profile WHERE p.username = 'abc123' RETURN p
MATCH (p:Profile) WITH p WHERE p.username = 'abc123' RETURN p

上述查询可行，但您提供的原始查询失败，如上所述。有时查询会因为没有返回结果而失败（当它们应该有结果时），有时我们会看到一些关于缺少ID的Neo4j错误。这意味着查询仅在不命中索引时才起作用。

然后运行

DROP INDEX ON :Profile(username)
CREATE INDEX ON :Profile(username)

似乎解决了这个问题，确认索引已损坏。但是，整个时间Neo4j声称用户名索引是ONLINE。这种情况多次发生，但我们没有重现的步骤。

这可能是Neo4j中的一个错误。我的建议是避免（删除所有）架构属性索引，直到它被修复。

使用Spring Data Neo4j的Intermittent EntityNotFoundException

2 个答案: