Must have field set for it – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.15-8.9

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Briefly, this error occurs when a field is not set for a specific operation in Elasticsearch. This could be due to a missing field in the document or a misconfiguration in the mapping. To resolve this issue, you can check the document to ensure the required field is present. If it’s not, add it. If the field is present, check the mapping configuration to ensure it’s correctly set. Also, ensure that the field is not set to ‘null’ as Elasticsearch treats ‘null’ as an absence of data.

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This guide will help you check for common problems that cause the log ” must have [field] set for it ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “must have [field] set for it” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (inner == null) {
 throw new ParsingException(parser.getTokenLocation(); NAME.getPreferredName() + " must have [query] span query clause");
 if (field == null) {
 throw new ParsingException(parser.getTokenLocation(); NAME.getPreferredName() + " must have [field] set for it");
 FieldMaskingSpanQueryBuilder queryBuilder = new FieldMaskingSpanQueryBuilder(inner; field);
 return queryBuilder;


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