Couldn t resolve version – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to identify the version of a component or plugin. This could be due to incorrect version specification, missing version information, or incompatibility issues. To resolve this, ensure that the version specified matches the actual version of the component or plugin. If the version information is missing, add it. If there’s an incompatibility issue, you may need to upgrade or downgrade the component or plugin to a version compatible with your Elasticsearch.

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: index, version.

Log Context

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

 docIdAndVersion = VersionsAndSeqNoResolver.timeSeriesLoadDocIdAndVersion(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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