Json Solr分组查询分页工作不正常。[Solr,Lucene]
我已按字段Json Solr分组查询分页工作不正常。[Solr,Lucene],json,solr,lucene,solrcloud,Json,Solr,Lucene,Solrcloud,我已按字段系列将我的solr文档分组。 获取前20个组的solr查询如下 /select?q=*:*&group=true&group.field=family&group.ngroups=true&start=0&group.limit=1 { responseHeader: { zkConnected: true, status: 0, QTime: 5238, params: { q: "*:*", group.limit: "1", start: "396320",
系列
将我的solr文档分组。
获取前20个组的solr查询如下
/select?q=*:*&group=true&group.field=family&group.ngroups=true&start=0&group.limit=1
{
responseHeader: {
zkConnected: true,
status: 0,
QTime: 5238,
params: {
q: "*:*",
group.limit: "1",
start: "396320",
group.ngroups: "true",
group.field: "family",
group: "true"
}
},
grouped: {
family: {
matches: 464779,
ngroups: 396324,
groups: [ ]
}
}
}
此查询的结果是20组,如下所示
responseHeader: {
zkConnected: true,
status: 0,
QTime: 1260,
params: {
q: "*:*",
group.limit: "1",
start: "0",
group.ngroups: "true",
group.field: "family",
group: "true"
}
},
grouped: {
family: {
matches: 464779,
ngroups: 396324,
groups: [
{
groupValue: "__fam__ME.EA.HE.728928",
doclist: {
numFound: 1,
start: 0,
maxScore: 1,
docs: [
{
sku: "ME.EA.HE.728928",
title: "Rexton Pocket Family Hearing Instrument Fusion",
family: "__fam__ME.EA.HE.728928",
brand: "Rexton",
brandId: "6739",
inStock: false,
bulkDiscount: false,
quoteOnly: false,
cats: [
"Hearing Machine & Components",
"Health & Personal Care",
"Medical Supplies & Equipment"
],
leafCatIds: [
"6038"
],
parentCatIds: [
"6259",
"4913"
],
Type__attr__: "Pocket Family",
Type of Products__attr__: "Hearing Instrument",
price: 3790,
discount: 40,
createdAt: "2016-02-18T04:51:36Z",
moq: 1,
offerPrice: 2255,
suggestKeywords: [
"Rexton",
"Pocket Family",
"Rexton Pocket Family"
],
suggestPayload: "6038,Hearing Machine & Components",
_version_: 1548082328946868200
}
]
}
},
在这个结果中需要注意的是ngroups的值,它是396324
但当我想得到最后一页的数据时,我会在Solr上点击这个查询
select?q=*:*&group=true&group.field=family&group.ngroups=true&start=396320&group.limit=1
{
responseHeader: {
zkConnected: true,
status: 0,
QTime: 5238,
params: {
q: "*:*",
group.limit: "1",
start: "396320",
group.ngroups: "true",
group.field: "family",
group: "true"
}
},
grouped: {
family: {
matches: 464779,
ngroups: 396324,
groups: [ ]
}
}
}
当我将start设置为396320
时,结果为0。结果中必须有5个文档。实际组数为386887
。为什么ngroups不正确
顺便说一句,我安装的本地solr服务器中不存在此问题。仅在测试环境的solr cloud中显示这是一个已知的问题(在SolrCloud模式下会发生这种情况): 分布式搜索支持分组,但有一些注意事项: 当前,任何分布式搜索都不支持group.func
group.ngroups
和group.facet
要求每个组中的所有文档必须位于同一个碎片上,以便返回准确的计数。在许多情况下都是有用的解决方案
最直接的解决方案是将族用作布线键的一部分,确保所有相同的族值最终都位于同一节点上。由于与节点数量相比,不同族值的数量似乎非常高,因此这仍应确保文档在节点之间具有良好的分布
根据您实际要做的事情,可能还有其他替代解决方案(如果您只需要计数,使用JSON方面可能是一个好的解决方案)