+ NAME + unknown token ” + token + ” – Elasticsearch Error How To Solve Related Issues

+ NAME + unknown token ” + token + ” – 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 ” + 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, 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”[” + 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();

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 I keep getting "Uncaught SyntaxError: Unexpected token o" -views 419,708 ,score 306

Uncaught SyntaxError: Unexpected token u in JSON at position 0 -views   94,139,score 38

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