Invalid token in the inner collapse – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when there’s an incorrect or invalid token in the inner collapse field of an Elasticsearch query. This could be due to a typo, incorrect field name, or a field that doesn’t exist. To resolve this issue, you can: 1) Check the query for any typos or incorrect field names. 2) Verify that the field you’re trying to collapse on actually exists in your index. 3) Ensure that the field you’re collapsing on is not an analyzed field, as Elasticsearch doesn’t support collapsing on analyzed fields.

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This guide will help you check for common problems that cause the log ” Invalid token in the inner collapse ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “Invalid token in the inner collapse” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (isParsedCorrectly == false) {
 throw new ParsingException(parser.getTokenLocation(); "Invalid token in the inner collapse");
 }  }; COLLAPSE_FIELD; ObjectParser.ValueType.OBJECT);
 private String name;


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