Field masking span must have query span query clause – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.14

Briefly, this error occurs when an Elasticsearch query using the field_masking_span query type doesn’t include a [query] span query clause. The field_masking_span query allows you to execute a span query on a different field than the one specified. To resolve this issue, ensure that your field_masking_span query includes a [query] span query clause. This clause should specify the span query to be executed. Also, check your query syntax to ensure it’s correct and adheres to the Elasticsearch query DSL.

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

Log Context

Log “field_masking_span must have [query] span query clause” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 "[field_masking_span] query does not support [" + currentFieldName + "]");
 if (inner == null) {
 throw new ParsingException(parser.getTokenLocation(); "field_masking_span must have [query] span query clause");
 if (field == null) {
 throw new ParsingException(parser.getTokenLocation(); "field_masking_span must have [field] set for it");
 FieldMaskingSpanQueryBuilder queryBuilder = new FieldMaskingSpanQueryBuilder(inner; field);


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