Reloading search analyzers – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is trying to reload its search analyzers, which are used to process and analyze data. This could be due to a configuration issue, a problem with the analyzer definitions, or a system resource issue. To resolve this, you can check the analyzer configurations for errors, ensure that the analyzer definitions are correct and compatible with your OpenSearch version, and verify that your system has sufficient resources to perform the reload operation. If the problem persists, consider reducing the complexity of your analyzers or increasing system resources.

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This guide will help you check for common problems that cause the log ” reloading search analyzers ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, search.

Log Context

Log “reloading search analyzers” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            return defaultAnalyzer;

    public synchronized List reloadSearchAnalyzers(AnalysisRegistry registry) throws IOException {"reloading search analyzers");
        // refresh indexAnalyzers and search analyzers
        final Map tokenizerFactories = registry.buildTokenizerFactories(indexSettings);
        final Map charFilterFactories = registry.buildCharFilterFactories(indexSettings);
        final Map tokenFilterFactories = registry.buildTokenFilterFactories(indexSettings);
        final Map settings = indexSettings.getSettings().getGroups("index.analysis.analyzer");


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