Couldn’t resolve version – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Couldn’t resolve version ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: version and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Couldn’t resolve version”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

try {
 docIdAndVersion = VersionsAndSeqNoResolver.loadDocIdAndVersion(searcher.getIndexReader(); get.uid(); true);
 } catch (Exception e) {
 //TODO: A better exception goes here
 throw new EngineException(shardId; "Couldn't resolve version"; e);
 if (docIdAndVersion != null) {
 if (get.versionType().isVersionConflictForReads(docIdAndVersion.version; get.version())) {


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