Key from to doc count – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch is trying to retrieve a specific range of documents but fails due to incorrect or missing parameters. This could be due to a malformed query or a problem with the index. To resolve this issue, you can 1) Check and correct your query syntax, ensuring that the ‘from’ and ‘to’ parameters are correctly defined. 2) Verify that the index you’re querying exists and is properly structured. 3) If the problem persists, consider reindexing your data to ensure there are no underlying issues with your data structure.

This guide will help you check for common problems that cause the log ” key [{}]; from [{}]; to [{}]; doc_count [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: aggregations.

Log Context

Log “key [{}]; from [{}]; to [{}]; doc_count [{}]” classname is geodistance-aggregation.asciidoc.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

     String key = entry.getKeyAsString();    // key as String
    Number from = (Number) entry.getFrom(); // bucket from value
    Number to = (Number) entry.getTo();     // bucket to value
    long docCount = entry.getDocCount();    // Doc count"key [{}]; from [{}]; to [{}]; doc_count [{}]"; key; from; to; docCount);

This will basically produce:


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