2018-01-04：补充说明
如下的解决方案还是会偶尔蹦出几个DeadLock的问题，在运维查看了neo4j的内存占用时发现一个问题，neo4j十分吃swap，导致执行效率十分低下，再次仔细查阅官网发现缺少了一个很重要的内存配置参数，
dbms.memory.pagecache.size=1g
The amount of memory to use for mapping the store files, in bytes (or
kilobytes with the 'k' suffix, megabytes with 'm' and gigabytes with 'g').
If Neo4j is running on a dedicated server, then it is generally recommended
to leave about 2-4 gigabytes for the operating system, give the JVM enough
heap to hold all your transaction state and query context, and then leave the
rest for the page cache.
The default page cache memory assumes the machine is dedicated to running
Neo4j, and is heuristically set to 50% of RAM minus the max Java heap size.
{"results":[],"errors":[{"code":"Neo.TransientError.Transaction.DeadlockDetected","message":"LockClient[6092] can't wait on resource RWLock[NODE(133321815), hash=1215661247] since => LockClient[6092] <-[:HELD_BY]- RWLock[NODE(38473669), hash=1470152465] <-[:WAITING_FOR]- LockClient[6091] <-[:HELD_BY]- RWLock[NODE(133321815), hash=1215661247]","stackTrace":"org.neo4j.kernel.DeadlockDetectedException: LockClient[6092] can't wait on resource RWLock[NODE(133321815), hash=1215661247] since => LockClient[6092] <-[:HELD_BY]- RWLock[NODE(38473669), hash=1470152465] <-[:WAITING_FOR]- LockClient[6091] <-[:HELD_BY]- RWLock[NODE(133321815), hash=1215661247]\n\tat org.neo4j.kernel.impl.api.LockingStatementOperations.exclusiveOptimisticLock(LockingStatementOperations.java:539)\n\tat org.neo4j.kernel.impl.api.LockingStatementOperations.acquireExclusiveNodeLock(LockingStatementOperations.java:500)\n\tat org.neo4j.kernel.impl.api.LockingStatementOperations.lockRelationshipNodes(LockingStatementOperations.java:307)\n\tat org.neo4j.kernel.impl.api.LockingStatementOperations.relationshipCreate(LockingStatementOperations.java:286)\n\tat org.neo4j.kernel.impl.api.OperationsFacade.relationshipCreate(OperationsFacade.java:854)\n\tat org.neo4j.cypher.internal.spi.v3_3.TransactionBoundQueryContext.createRelationship(TransactionBoundQueryContext.scala:109)\n\tat org.neo4j.cypher.internal.spi.v3_3.TransactionBoundQueryContext.createRelationship(TransactionBoundQueryContext.scala:70)\n\tat org.neo4j.cypher.internal.spi.v3_3.ExceptionTranslationSupport$class.translateException(ExceptionTranslationSupport.scala:32)\n\tat org.neo4j.cypher.internal.spi.v3_3.UpdateCountingQueryContext.createRelationship(UpdateCountingQueryContext.scala:92)\n\tat scala.collection.Iterator$$anon$11.next(Iterator.scala:410)\n\tat org.neo4j.cypher.internal.PreparedPlanExecution.execute(PreparedPlanExecution.scala:29)\n\tat org.neo4j.cypher.internal.ExecutionEngine.execute(ExecutionEngine.scala:116)\n\tat org.neo4j.cypher.internal.ExecutionEngine.execute(ExecutionEngine.scala:111)\n\tat org.neo4j.cypher.internal.javacompat.ExecutionEngine.executeQuery(ExecutionEngine.java:76)\n\tat org.neo4j.server.rest.transactional.TransactionHandle.safelyExecute(TransactionHandle.java:371)\n\tat org.neo4j.server.rest.transactional.TransactionHandle.executeStatements(TransactionHandle.java:323)\n\tat org.neo4j.server.rest.web.TransactionalService.lambda$executeStatementsAndCommit$1(TransactionalService.java:218)\n\tat com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:71)\n\tat com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:57)\n\tat com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:302)\n\tat com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1510)\n\tat com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)\n\tat com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)\n\tat com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)\n\tat com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)\n\tat com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:790)\n\tat org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)\n\tat org.neo4j.server.rest.dbms.AuthorizationDisabledFilter.doFilter(AuthorizationDisabledFilter.java:49)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)\n\tat org.neo4j.server.rest.web.CollectUserAgentFilter.doFilter(CollectUserAgentFilter.java:69)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)\n\tat org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:499)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:258)\n\tat org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)\n\tat java.lang.Thread.run(Thread.java:748)\n"}]}