Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.
To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.
Take a self-guided product tour to see for yourself (no registration required).This guide will help you check for common problems that cause the log ” + NAME + no join field has been configured ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: join and query.
Log Context
Log “[” + NAME + “] no join field has been configured”classname is HasChildQueryBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :
ParentJoinFieldMapper joinFieldMapper = ParentJoinFieldMapper.getMapper(context.getMapperService());
if (joinFieldMapper == null) {
if (ignoreUnmapped) {
return new MatchNoDocsQuery();
} else {
throw new QueryShardException(context; "[" + NAME + "] no join field has been configured");
}
}
ParentIdFieldMapper parentIdFieldMapper = joinFieldMapper.getParentIdFieldMapper(type; false);
if (parentIdFieldMapper != null) {
