Neo4j Cypher查询失败并返回未知错误-Java 学习之路

我正在尝试构建一个Cypher查询来测试是否存在特定结构，因此我可以将日期与之关联起来 .

在Linux服务器上运行Neo4j 2.1.0-M01，但Neo4j 2.0.1也出现了同样的问题

我们从一个干净的数据库开始，0个节点 .

首先，我正在运行此MATCH查询以证明它运行 . 显然这个查询不会返回任何节点 . 但是在创建节点之后，它将以“未知错误”失败 . 这对我来说似乎是一个错误，因为具有较少节点的查询将返回 . 有没有人建议如何重写此查询？

很抱歉这篇文章中包含大量代码 .

谢谢，

-Edwin

Cypher查询：

MATCH (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'}) ,(sc1:Controller{serialnumber:'7000610071',system_id:'1873784171',hostname:'node01',node_uuid:'7cd70205-66ae-11e0-a4a9-0deba859517d'}) ,(sc1)-[:IS_PART_OF_CLUSTER]->(c) ,(sc2:Controller{serialnumber:'7000606111',system_id:'1873778118',hostname:'node02',node_uuid:'b954f0a1-6682-11e0-b8a0-517da924923d'}) ,(sc2)-[:IS_PART_OF_CLUSTER]->(c) ,(sc3:Controller{serialnumber:'7000561878',system_id:'1873772083',hostname:'node03',node_uuid:'ac293586-6690-11e0-b8a0-517da924923d'}) ,(sc3)-[:IS_PART_OF_CLUSTER]->(c) ,(sc4:Controller{serialnumber:'800000075807',system_id:'1873784143',hostname:'node04',node_uuid:'e8d6c7e5-663e-11e0-b8a0-517da924923d'}) ,(sc4)-[:IS_PART_OF_CLUSTER]->(c) ,(sc5:Controller{serialnumber:'7000477261',system_id:'1873745662',hostname:'node05',node_uuid:'1d1ecc64-728c-11e0-bf0e-3d25383f7ed3'}) ,(sc5)-[:IS_PART_OF_CLUSTER]->(c) ,(sc6:Controller{serialnumber:'7000477273',system_id:'1873745654',hostname:'node06',node_uuid:'140fb0f9-728c-11e0-afeb-49fcf0b6e6c3'}) ,(sc6)-[:IS_PART_OF_CLUSTER]->(c) ,(sc7:Controller{serialnumber:'7000474908',system_id:'1873745665',hostname:'node07',node_uuid:'edbf9c62-728b-11e0-bf0e-3d25383f7ed3'}) ,(sc7)-[:IS_PART_OF_CLUSTER]->(c) ,(sc8:Controller{serialnumber:'7000474910',system_id:'1873745695',hostname:'node08',node_uuid:'20dbfe67-7832-11e0-afeb-49fcf0b6e6c3'}) ,(sc8)-[:IS_PART_OF_CLUSTER]->(c) ,(sc9:Controller{serialnumber:'7000609864',system_id:'1873802756',hostname:'node09',node_uuid:'a8b75397-6690-11e0-b8a0-517da924923d'}) ,(sc9)-[:IS_PART_OF_CLUSTER]->(c) ,(sc10:Controller{serialnumber:'7000610021',system_id:'1873791030',hostname:'node10',node_uuid:'f6cf0705-6670-11e0-b8a0-517da924923d'}) ,(sc10)-[:IS_PART_OF_CLUSTER]->(c) ,(sc11:Controller{serialnumber:'7000610057',system_id:'1873784128',hostname:'node11',node_uuid:'551b1bf8-663d-11e0-b8a0-517da924923d'}) ,(sc11)-[:IS_PART_OF_CLUSTER]->(c) ,(sc12:Controller{serialnumber:'7000609981',system_id:'1873778164',hostname:'node12',node_uuid:'f6062d6c-663e-11e0-9b53-cd0ece6aa2ce'}) ,(sc12)-[:IS_PART_OF_CLUSTER]->(c) ,(sc13:Controller{serialnumber:'7000610033',system_id:'1873778186',hostname:'node13',node_uuid:'ed0e61c5-6670-11e0-b07f-933da0385fdc'}) ,(sc13)-[:IS_PART_OF_CLUSTER]->(c) ,(sc14:Controller{serialnumber:'7000610069',system_id:'1873784175',hostname:'node14',node_uuid:'8623ea28-66ae-11e0-ab9d-5fdc7f30dee7'}) ,(sc14)-[:IS_PART_OF_CLUSTER]->(c) ,(sc15:Controller{serialnumber:'7000606109',system_id:'1873778197',hostname:'node15',node_uuid:'b4349a83-6682-11e0-ab9d-5fdc7f30dee7'}) ,(sc15)-[:IS_PART_OF_CLUSTER]->(c) ,(sc16:Controller{serialnumber:'7000610045',system_id:'1873784157',hostname:'node16',node_uuid:'67d80db8-663d-11e0-9b53-cd0ece6aa2ce'}) ,(sc16)-[:IS_PART_OF_CLUSTER]->(c) ,(sc17:Controller{serialnumber:'7001246085',system_id:'2014175904',hostname:'node19',node_uuid:'1c792588-ff4e-11db-94fe-3b91dd7dd242'}) ,(sc17)-[:IS_PART_OF_CLUSTER]->(c) ,(sc18:Controller{serialnumber:'7001246097',system_id:'2014176797',hostname:'node20',node_uuid:'3ae9e7ae-ff44-11db-864d-af2af862bba3'}) ,(sc18)-[:IS_PART_OF_CLUSTER]->(c) RETURN c,sc1,sc2,sc3,sc4,sc5,sc6,sc7,sc8,sc9,sc10,sc11,sc12,sc13,sc14,sc15,sc16,sc17,sc18 Rows returned: 0

Cypher查询用于创建节点：

CREATE (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'}) ,(sc1:Controller{serialnumber:'7000610071',system_id:'1873784171',hostname:'node01',node_uuid:'7cd70205-66ae-11e0-a4a9-0deba859517d'}) ,(sc1)-[:IS_PART_OF_CLUSTER]->(c) ,(sc2:Controller{serialnumber:'7000606111',system_id:'1873778118',hostname:'node02',node_uuid:'b954f0a1-6682-11e0-b8a0-517da924923d'}) ,(sc2)-[:IS_PART_OF_CLUSTER]->(c) ,(sc3:Controller{serialnumber:'7000561878',system_id:'1873772083',hostname:'node03',node_uuid:'ac293586-6690-11e0-b8a0-517da924923d'}) ,(sc3)-[:IS_PART_OF_CLUSTER]->(c) ,(sc4:Controller{serialnumber:'800000075807',system_id:'1873784143',hostname:'node04',node_uuid:'e8d6c7e5-663e-11e0-b8a0-517da924923d'}) ,(sc4)-[:IS_PART_OF_CLUSTER]->(c) ,(sc5:Controller{serialnumber:'7000477261',system_id:'1873745662',hostname:'node05',node_uuid:'1d1ecc64-728c-11e0-bf0e-3d25383f7ed3'}) ,(sc5)-[:IS_PART_OF_CLUSTER]->(c) ,(sc6:Controller{serialnumber:'7000477273',system_id:'1873745654',hostname:'node06',node_uuid:'140fb0f9-728c-11e0-afeb-49fcf0b6e6c3'}) ,(sc6)-[:IS_PART_OF_CLUSTER]->(c) ,(sc7:Controller{serialnumber:'7000474908',system_id:'1873745665',hostname:'node07',node_uuid:'edbf9c62-728b-11e0-bf0e-3d25383f7ed3'}) ,(sc7)-[:IS_PART_OF_CLUSTER]->(c) ,(sc8:Controller{serialnumber:'7000474910',system_id:'1873745695',hostname:'node08',node_uuid:'20dbfe67-7832-11e0-afeb-49fcf0b6e6c3'}) ,(sc8)-[:IS_PART_OF_CLUSTER]->(c) ,(sc9:Controller{serialnumber:'7000609864',system_id:'1873802756',hostname:'node09',node_uuid:'a8b75397-6690-11e0-b8a0-517da924923d'}) ,(sc9)-[:IS_PART_OF_CLUSTER]->(c) ,(sc10:Controller{serialnumber:'7000610021',system_id:'1873791030',hostname:'node10',node_uuid:'f6cf0705-6670-11e0-b8a0-517da924923d'}) ,(sc10)-[:IS_PART_OF_CLUSTER]->(c) ,(sc11:Controller{serialnumber:'7000610057',system_id:'1873784128',hostname:'node11',node_uuid:'551b1bf8-663d-11e0-b8a0-517da924923d'}) ,(sc11)-[:IS_PART_OF_CLUSTER]->(c) ,(sc12:Controller{serialnumber:'7000609981',system_id:'1873778164',hostname:'node12',node_uuid:'f6062d6c-663e-11e0-9b53-cd0ece6aa2ce'}) ,(sc12)-[:IS_PART_OF_CLUSTER]->(c) ,(sc13:Controller{serialnumber:'7000610033',system_id:'1873778186',hostname:'node13',node_uuid:'ed0e61c5-6670-11e0-b07f-933da0385fdc'}) ,(sc13)-[:IS_PART_OF_CLUSTER]->(c) ,(sc14:Controller{serialnumber:'7000610069',system_id:'1873784175',hostname:'node14',node_uuid:'8623ea28-66ae-11e0-ab9d-5fdc7f30dee7'}) ,(sc14)-[:IS_PART_OF_CLUSTER]->(c) ,(sc15:Controller{serialnumber:'7000606109',system_id:'1873778197',hostname:'node15',node_uuid:'b4349a83-6682-11e0-ab9d-5fdc7f30dee7'}) ,(sc15)-[:IS_PART_OF_CLUSTER]->(c) ,(sc16:Controller{serialnumber:'7000610045',system_id:'1873784157',hostname:'node16',node_uuid:'67d80db8-663d-11e0-9b53-cd0ece6aa2ce'}) ,(sc16)-[:IS_PART_OF_CLUSTER]->(c) ,(sc17:Controller{serialnumber:'7001246085',system_id:'2014175904',hostname:'node19',node_uuid:'1c792588-ff4e-11db-94fe-3b91dd7dd242'}) ,(sc17)-[:IS_PART_OF_CLUSTER]->(c) ,(sc18:Controller{serialnumber:'7001246097',system_id:'2014176797',hostname:'node20',node_uuid:'3ae9e7ae-ff44-11db-864d-af2af862bba3'}) ,(sc18)-[:IS_PART_OF_CLUSTER]->(c) RETURN c,sc1,sc2,sc3,sc4,sc5,sc6,sc7,sc8,sc9,sc10,sc11,sc12,sc13,sc14,sc15,sc16,sc17,sc18

19 nodes created, 18 relationships.

现在，当我再次运行第一个查询时，需要一分钟，最终将返回“未知错误” .

Cypher查询：

Returns Unknown Error

1 回答

你的MATCH查询是复杂的 . 无需指定每个节点 . 以下查询返回集群及其相关控制器：

MATCH (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'})<-[:IS_PART_OF_CLUSTER]-(sc:Controller) 
WITH c, collect(sc) as controllers 
RETURN c as cluster, controllers

回复于 2024-04-18T21:33:49+08:00

Neo4j Cypher查询失败并返回未知错误

1 回答

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