More like this requires like to be specified – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when the ‘like’ parameter is not specified in a ‘more_like_this’ query in Elasticsearch. The ‘more_like_this’ query is used to find documents that are “like” a given set of documents. To resolve this issue, you need to specify the ‘like’ parameter in your query. This could be a single document, multiple documents, or simply a string of text. Make sure the ‘like’ parameter is correctly formatted and contains valid data.

This guide will help you check for common problems that cause the log ” more_like_this requires ‘like’ to be specified ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “more_like_this requires ‘like’ to be specified” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  if (likeTexts.isEmpty() && likeItems.isEmpty()) {
 throw new ParsingException(parser.getTokenLocation(); "more_like_this requires 'like' to be specified");
 if (fields != null && fields.isEmpty()) {
 throw new ParsingException(parser.getTokenLocation(); "more_like_this requires 'fields' to be non-empty");


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