春季數據Neo4j間歇性EntityNotFoundException

Question

我使用Neo4j 2.1.6和Spring Data Neo4j 3.2.1。我一直在使用Neo4j 2.1.6（即沒有從早期版本的Neo遷移過來）。

我遇到了一個間歇性問題，當我嘗試做MATCH語句時，例如

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

我發現了一個EntityNotFoundException，說這樣的話，

Node with id 25393 

一對夫婦相似匹配查詢返回相似的結果。

我注意到未找到的ID大於數據庫中的最大內部節點ID。

我不確定發生了什麼事情，因爲它是間歇性的。

任何有關此事的幫助將不勝感激。

實例堆棧跟蹤如下：

</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

看來你對:Profile(username)

所以新（暗號）沒有索引必須對所有掃描：其中一些可能已經同時刪除檔案節點。所以Cypher從索引中讀取id，之後節點被刪除，只有在稍後它嘗試加載具有該屬性比較的id的節點，但它已經消失了。

我認爲它是在更新版本的Neo4j中解決的，但我不確定。

Answer 2

我們在Neo4j 2.2.3和Spring Data 3.3.1中遇到了類似的問題。

根據您對Michael的回答的評論，這聽起來像您有一個用戶名屬性的索引。我們在Neo4j瀏覽器中使用：schema驗證了我們有一個針對「用戶名」的模式索引。 它似乎索引損壞了。我證實了這一運行相同的查詢，但一對夫婦的曲折繞過指數：

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

上述查詢的工作，但所描述的原始查詢你給失敗。有時查詢會失敗，返回沒有結果（當他們應該有結果時），有時我們看到一些關於缺少ID的Neo4j錯誤。這意味着查詢僅在而非達到索引時才起作用。

然後運行

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

似乎解決它，確認該指數已損壞。但是，Neo4j一直聲稱用戶名索引是ONLINE。這種情況多次發生，但我們沒有重現的步驟。

這可能是Neo4j中的一個錯誤。我的建議是避免（全部刪除）模式屬性索引，直到它被修復。