Rescore doesn’t support ” + fieldName + ” – How to solve this Elasticsearch error

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Rescore doesn’t support ” + fieldName + ” – How to solve this Elasticsearch error

Opster Team

July-20, 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 that cause many errors.

This guide will help you check for common problems that cause the log ” rescore doesn’t support ” + fieldName + ” ” 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: search.

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 pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”rescore doesn’t support [” + fieldName + “]”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

fieldName = parser.currentName();
  } else if (token.isValue()) {
  if (WINDOW_SIZE_FIELD.match(fieldName; parser.getDeprecationHandler())) {
  windowSize = parser.intValue();
  } else {
  throw new ParsingException(parser.getTokenLocation(); "rescore doesn't support [" + fieldName + "]");
  } else if (token == XContentParser.Token.START_OBJECT) {
  rescorer = parser.namedObject(RescorerBuilder.class; fieldName; null);
  } else {
  throw new ParsingException(parser.getTokenLocation(); "unexpected token [" + token + "] after [" + fieldName + "]");


Run the Check-Up to get a customized report like this:

Analyze your cluster