FieldName – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7-7.15

Briefly, this error occurs when Elasticsearch cannot find the specified field name in the index. This could be due to a typo in the field name, or the field may not exist in the current index. To resolve this issue, you should first verify the field name in your query. If the field name is correct, check if the field exists in your index. If it doesn’t, you may need to add it. Alternatively, you may need to reindex your data if the field was added after the index was created.

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

Log Context

Log ” [” + fieldName + “] ” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 * @throws ParsingException if query boost value isn't equal to {@link AbstractQueryBuilder#DEFAULT_BOOST}
 static void checkNoBoost(String queryName; String fieldName; XContentParser parser; SpanQueryBuilder clause) {
 try {
 if (clause.boost() != AbstractQueryBuilder.DEFAULT_BOOST) {
 throw new ParsingException(parser.getTokenLocation(); queryName + " [" + fieldName + "] " +
 "as a nested span clause can't have non-default boost value [" + clause.boost() + "]");
 } catch (UnsupportedOperationException ignored) {
 // if boost is unsupported it can't have been set


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