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

Opster Team

August-23, Version: 6.8-7.14

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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.

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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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