Constant_score requires a ‘filter’ element – Elasticsearch Error How To Solve Related Issues

Constant_score requires a ‘filter’ element – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many errors 


This guide will help you check for common problems that cause the log “constant_score requires a ‘filter’ element” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: query, index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”[constant_score] requires a ‘filter’ element”classname  is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else {
  throw new ParsingException(parser.getTokenLocation(); "unexpected token [" + token + "]");
  if (!queryFound) {
  throw new ParsingException(parser.getTokenLocation(); "[constant_score] requires a 'filter' element");
  ConstantScoreQueryBuilder constantScoreBuilder = new ConstantScoreQueryBuilder(query);

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Term Filter in array only consider the last item? -views 3,991 ,score 4

Elasticsearch : constant_score query vs bool.filter query -views   3,798,score 7

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