Unknown token – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.4-7.15

Briefly, this error occurs when Elasticsearch encounters an unexpected token in the request body. This could be due to a syntax error, incorrect field name, or unsupported operation. To resolve this issue, you should first check the request body for any syntax errors. Make sure all field names are correct and all operations are supported by your version of Elasticsearch. If the error persists, try to simplify the request to identify the problematic part. Lastly, ensure that the content type of your request matches the data format you’re sending.

This guide will help you check for common problems that cause the log ” 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 “unknown token [” class name is AbstractGeometryQueryBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 params.shapePath = parser.text();
 } else if (SHAPE_ROUTING_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 params.shapeRouting = parser.text();
 } else {
 throw new ParsingException(parser.getTokenLocation(); "unknown token [" + token
 + "] after [" + currentFieldName + "]");
 } else {
 throw new ParsingException(parser.getTokenLocation(); "query does not support [" + currentFieldName + "]");


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