Expected NESTED FILTER FIELD getPreferredName element – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when the OpenSearch engine expects a nested filter field named ‘getPreferredName’ but it’s not found in the query or the data schema. This could be due to a typo, incorrect field name, or the field not being properly nested. To resolve this, ensure the field ‘getPreferredName’ exists in your data schema and is correctly nested. Also, check your query to ensure it’s correctly referencing the ‘getPreferredName’ field. If the field is not necessary, consider removing it from your query.

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This guide will help you check for common problems that cause the log ” Expected ” + NESTED_FILTER_FIELD.getPreferredName() + ” element. ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: sort, search.

Log Context

Log “Expected ” + NESTED_FILTER_FIELD.getPreferredName() + ” element.” class name is SortBuilder.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 protected static QueryBuilder parseNestedFilter(XContentParser parser) {
 try {
 return parseInnerQueryBuilder(parser);
 } catch (Exception e) {
 throw new ParsingException(parser.getTokenLocation(); "Expected " + NESTED_FILTER_FIELD.getPreferredName() + " element."; e);
 }  @Override
 public String toString() {


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