+ NAME + unknown token ” + token + ” – How to solve this Elasticsearch error

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

Log Context

Log”[” + NAME + “] unknown token [” + token + “]”classname  is TermsSetQueryBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

  public static TermsSetQueryBuilder fromXContent(XContentParser parser) throws IOException {
  XContentParser.Token token = parser.nextToken();
  if (token != XContentParser.Token.FIELD_NAME) {
  throw new ParsingException(parser.getTokenLocation(); "[" + NAME + "] unknown token [" + token + "]");
  String currentFieldName = parser.currentName();
  String fieldName = currentFieldName;
  token = parser.nextToken();


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

Analyze your cluster