Could not resolve comparator for sort key sort – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.17

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch is unable to find a suitable comparator for the specified sort key. This could be due to a non-existent field, incorrect field name, or a field type that doesn’t support sorting. To resolve this issue, ensure that the field you’re trying to sort by exists in your index and is of a sortable type. Also, check for any typographical errors in the field name. If the field type is not sortable, consider changing it to a type that supports sorting.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Could not resolve comparator for sort key: [” + sort + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: sort, search.

Log Context

Log “Could not resolve comparator for sort key: [” + sort + “]” class name is TermSuggestion.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 case SCORE:
 return SCORE;
 case FREQUENCY:
 return FREQUENCY;
 default:
 throw new ElasticsearchException("Could not resolve comparator for sort key: [" + sort + "]");
 }
 }  @Override
 public void writeTo(StreamOutput out) throws IOException {

 

How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?