Neo4j java.lang.NullPointerException不能理解

我有NodeJS项目，我正在使用neo4j库版本^2.0.0-RC2执行Neo4j Cypher查询。 我有一个查询，如果在Node应用程序中运行给出了下面的错误堆栈，但如果我在浏览器控制台内运行相同的查询，它会返回罚款。

  [neo4j.DatabaseError: [Neo.DatabaseError.Statement.ExecutionFailure] java.lang.NullPointerException at org.neo4j.cypher.internal.compiler.v2_3.pipes.NiceHasherValue.equals(NiceHasher.scala:70) at scala.collection.mutable.FlatHashTable$class.findElemImpl(FlatHashTable.scala:128) at scala.collection.mutable.FlatHashTable$class.containsElem(FlatHashTable.scala:121) at scala.collection.mutable.HashSet.containsElem(HashSet.scala:40) at scala.collection.mutable.HashSet.contains(HashSet.scala:57) at org.neo4j.cypher.internal.compiler.v2_3.pipes.aggregation.DistinctFunction.apply(DistinctFunction.scala:38) at org.neo4j.cypher.internal.compiler.v2_3.pipes.EagerAggregationPipe$$anonfun$internalCreateResults$1$$anonfun$apply$1.apply(EagerAggregationPipe.scala:84) at org.neo4j.cypher.internal.compiler.v2_3.pipes.EagerAggregationPipe$$anonfun$internalCreateResults$1$$anonfun$apply$1.apply(EagerAggregationPipe.scala:84) at scala.collection.immutable.List.foreach(List.scala:381) at org.neo4j.cypher.internal.compiler.v2_3.pipes.EagerAggregationPipe$$anonfun$internalCreateResults$1.apply(EagerAggregationPipe.scala:84) at org.neo4j.cypher.internal.compiler.v2_3.pipes.EagerAggregationPipe$$anonfun$internalCreateResults$1.apply(EagerAggregationPipe.scala:80) at scala.collection.Iterator$class.foreach(Iterator.scala:742) at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) at org.neo4j.cypher.internal.compiler.v2_3.pipes.EagerAggregationPipe.internalCreateResults(EagerAggregationPipe.scala:80) at org.neo4j.cypher.internal.compiler.v2_3.pipes.PipeWithSource.createResults(Pipe.scala:125) at org.neo4j.cypher.internal.compiler.v2_3.pipes.PipeWithSource.createResults(Pipe.scala:122) at org.neo4j.cypher.internal.compiler.v2_3.executionplan.DefaultExecutionResultBuilderFactory$ExecutionWorkflowBuilder.createResults(DefaultExecutionResultBuilderFactory.scala:93) at org.neo4j.cypher.internal.compiler.v2_3.executionplan.DefaultExecutionResultBuilderFactory$ExecutionWorkflowBuilder.build(DefaultExecutionResultBuilderFactory.scala:63) at org.neo4j.cypher.internal.compiler.v2_3.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1.apply(ExecutionPlanBuilder.scala:223) at org.neo4j.cypher.internal.compiler.v2_3.executionplan.ExecutionPlanBuilder$$anonfun$getExecutionPlanFunction$1.apply(ExecutionPlanBuilder.scala:207) at org.neo4j.cypher.internal.compiler.v2_3.executionplan.ExecutionPlanBuilder$$anon$2.run(ExecutionPlanBuilder.scala:164) at org.neo4j.cypher.internal.compatibility.CompatibilityFor2_3$ExecutionPlanWrapper$$anonfun$run$1.apply(CompatibilityFor2_3.scala:200) at org.neo4j.cypher.internal.compatibility.CompatibilityFor2_3$ExecutionPlanWrapper$$anonfun$run$1.apply(CompatibilityFor2_3.scala:200) at org.neo4j.cypher.internal.compatibility.exceptionHandlerFor2_3$.runSafely(CompatibilityFor2_3.scala:116) at org.neo4j.cypher.internal.compatibility.CompatibilityFor2_3$ExecutionPlanWrapper.run(CompatibilityFor2_3.scala:199) at org.neo4j.cypher.internal.PreparedPlanExecution.execute(PreparedPlanExecution.scala:27) at org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:120) at org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:114) at org.neo4j.cypher.javacompat.internal.ServerExecutionEngine.executeQuery(ServerExecutionEngine.java:62) at org.neo4j.server.rest.transactional.TransactionHandle.executeStatements(TransactionHandle.java:328) at org.neo4j.server.rest.transactional.TransactionHandle.commit(TransactionHandle.java:147) at org.neo4j.server.rest.web.TransactionalService$2.write(TransactionalService.java:211) at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:71) at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:57) at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:302) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1510) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) at org.neo4j.server.rest.dbms.AuthorizationFilter.doFilter(AuthorizationFilter.java:116) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.neo4j.server.rest.web.CollectUserAgentFilter.doFilter(CollectUserAgentFilter.java:69) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:497) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745) ] 

用Javascript堆栈跟踪如下：

  at Function.__dirname.Error.Error._fromObject (/home/savitoj/Work/mercureup/node_modules/neo4j/lib-new/errors.js:70:14) at /home/savitoj/Work/mercureup/node_modules/neo4j/lib-new/GraphDatabase.js:299:25 at Request._callback (/home/savitoj/Work/mercureup/node_modules/neo4j/lib-new/GraphDatabase.js:92:20) at Request.self.callback (/home/savitoj/Work/mercureup/node_modules/request/request.js:198:22) at emitTwo (events.js:100:13) at Request.emit (events.js:185:7) at Request.<anonymous> (/home/savitoj/Work/mercureup/node_modules/request/request.js:1035:10) at emitOne (events.js:95:20) at Request.emit (events.js:182:7) at IncomingMessage.<anonymous> (/home/savitoj/Work/mercureup/node_modules/request/request.js:962:12) at emitNone (events.js:85:20) at IncomingMessage.emit (events.js:179:7) at endReadableNT (_stream_readable.js:906:12) at nextTickCallbackWith2Args (node.js:475:9) at process._tickCallback (node.js:389:17) 

我的查询如下

 MATCH (place:Place)<-[:IN]-(event:Event {id:'29_jun_2'})-[]-(chat:Chat), (user:User {id: 'NJE86-jRe'}) OPTIONAL MATCH (event)-[:CHKIN]-(friendchkin:User)-[:FRIEND]-(user) WHERE NOT (friendchkin)-[:BLOCK]->(user) return event, chat, user, COLLECT(distinct friendchkin) AS friendschkin; 

当我在OPTIONAL MATCH之后注释掉部分时，查询工作正常，但是包含错误。在浏览器控制台中，我按预期得到事件，聊天，用户，并且COLLECT返回一个空数组。

还会提到在运行NodeJS应用程序时在Neo4j控制台中显示无错误堆栈跟踪，错误只出现在NodeJS服务器terminal。