Required alias ” + alias + ” does not exist – How to solve this Elasticsearch error

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Required alias ” + alias + ” does not exist – How to solve this Elasticsearch error

Opster Team

March-22, 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 ” required alias ” + alias + ” does not exist ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster, metadata, alias.

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 “required alias [” + alias + “] does not exist”classname  is AliasAction.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

@Override
 boolean apply(NewAliasValidator aliasValidator; Metadata.Builder metadata; IndexMetadata index) {
 if (false == index.getAliases().containsKey(alias)) {
 if (mustExist != null && mustExist) {
 throw new ResourceNotFoundException("required alias [" + alias + "] does not exist");
 }
 return false;
 }
 metadata.put(IndexMetadata.builder(index).removeAlias(alias));
 return true;

 

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