NAME unknown token – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch encounters an unexpected token in the JSON request body. This could be due to a syntax error, such as a missing or extra comma, bracket, or quotation mark. To resolve this issue, you should carefully review your JSON request body for any syntax errors. You can use a JSON validator tool to help identify any issues. Additionally, ensure that the field names in your request match exactly with those in your Elasticsearch index.

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This guide will help you check for common problems that cause the log ” [” + NAME + “] unknown token [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, query.

Log Context

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

 } else {
 throw new ParsingException(parser.getTokenLocation(); "[" + NAME + "] query does not support ["
 + currentFieldName + "]");
 }
 } else {
 throw new ParsingException(parser.getTokenLocation(); "[" + NAME + "] unknown token [" + token +
 "] after [" + currentFieldName + "]");
 }
 }  token = parser.nextToken();

 

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