reason "function score query returned an invalid score: NaN for doc: 17085
原因是向量搜索定义评分的计算方法consineSimilarity的计算过程中需要对两个向量求模
故，如果全文索引中存在全零向量数据时，可以将consineSimilarity计算换成其它向量相似度计算方法，例如 dotProduct文章来源：https://www.toymoban.com/news/detail-606921.html
GET reference/_search
{ "explain": true,
"query": {
"function_score": {
"query": {
"multi_match": {
"query": "清华大学艺术系的小明同学",
"fields": ["name", "school", "department", "home_address"]
}
},
"functions": [
{
"script_score": {
"script": {
"source": "(cosineSimilarity(params.query_vector, 'text_vector') + 1.0)*0.6",
"params": {
"query_vector": [0.17213014641107321, 0.03529149917147957, 0.021164631815954453, 0.04276578593911642, -0.011539837034197614, -0.040505111467529525, -0.013804620485218865, 0.07954305265937577, -0.03259408482301212, 0.042030898483276985, -0.08187475423584016, 0.02331000497613773, -0.012518793076655677, 0.028751927085989483, -0.0450599553695574, 0.02574408603742391, -0.012067035100387393, 0.08755896933278114, 0.0043671871492196096]
}
}
}
},
{
"field_value_factor": {
"field": "page_r",
"modifier": "log1p",
"factor": 100,
"missing": 1
}
}
],
"score_mode": "max",
"boost_mode": "multiply"
}
},
"_source": ["student_id", "school", "name"],
"size": 20
}consineSimilarity替换为文章来源地址https://www.toymoban.com/news/detail-606921.html
"source": "(dopProduct(params.query_vector, 'text_vector') + 1.0)*0.6", 到了这里，关于ES 向量搜索 function score 报错的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
