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 Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error message typically indicates that Elasticsearch is unable to determine the version of a node in a cluster. This could be due to network connectivity issues, incorrect configuration, or other environmental factors. To resolve this issue, ensure that the nodes are properly configured and reachable from one another and that the cluster is functioning correctly. Additionally, it may be necessary to restart Elasticsearch or perform other troubleshooting steps to diagnose and correct the underlying cause of the issue.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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.

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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