elasticsearch type_error ai_generated true

QueryShardException: failed to create query: boost must be positive, got [-2.0]

ID: elasticsearch/invalid-boost-in-query

Also available as: JSON · Markdown · 中文
92%Fix Rate
88%Confidence
1Evidence
2023-11-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.17.0 active — — —
8.10.0 active — — —
8.13.0 active — — —

Root Cause

A negative or zero boost value in a query DSL, such as in a function_score query or term query, violates the requirement that boost must be a positive float.

generic

中文

查询DSL中的负值或零提升值（例如在function_score查询或term查询中）违反了提升值必须为正浮点的要求。

Official Documentation

https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html

Workarounds

  1. 95% success Change the boost value to a positive float, e.g., in a function_score query: { "function_score": { "query": { "match": { "field": "value" } }, "boost": 0.5 } } 
    Change the boost value to a positive float, e.g., in a function_score query: { "function_score": { "query": { "match": { "field": "value" } }, "boost": 0.5 } }
  2. 85% success Use a script_score query with Math.max(boost, 0.01) to ensure positivity: { "script_score": { "query": { "match_all": {} }, "script": { "source": "Math.max(_score, 0.01)" } } } 
    Use a script_score query with Math.max(boost, 0.01) to ensure positivity: { "script_score": { "query": { "match_all": {} }, "script": { "source": "Math.max(_score, 0.01)" } } }

中文步骤

  1. 将提升值改为正浮点数，例如在function_score查询中：{ "function_score": { "query": { "match": { "field": "value" } }, "boost": 0.5 } }
  2. 使用script_score查询并确保提升值正数：{ "script_score": { "query": { "match_all": {} }, "script": { "source": "Math.max(_score, 0.01)" } } }

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Index-time boost is deprecated and ignored; the error is about query-time boost, not mapping boost

  2. 85% fail

    Negative boost is not supported; use a 'must_not' clause or script_score with negation instead