NAME no join field found for index indexName – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch is unable to find a join field in the specified index. The join field is used to create parent-child relationships between documents in the same index. To resolve this issue, you can either add a join field to your index mapping or modify your query to not require a join field. If you’re using a join field, ensure that it’s correctly defined and that the parent and child documents are properly linked.

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This guide will help you check for common problems that cause the log ” [” + NAME + “] no join field found for index [” + indexName + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: join, index, query.

Log Context

Log “[” + NAME + “] no join field found for index [” + indexName + “]” class name is ParentIdQueryBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (joiner == null) {
 if (ignoreUnmapped) {
 return new MatchNoDocsQuery();
 } else {
 final String indexName = context.getIndexSettings().getIndex().getName();
 throw new QueryShardException(context; "[" + NAME + "] no join field found for index [" + indexName + "]");
 }
 }
 if (joiner.childTypeExists(type) == false) {
 if (ignoreUnmapped) {
 return new MatchNoDocsQuery();

 

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