Failed to load nori user dictionary – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to load the Nori user dictionary, which is used for Korean language analysis. This could be due to a missing or incorrectly formatted dictionary file, or incorrect file path in the configuration. To resolve this, ensure the dictionary file exists, is correctly formatted, and the file path in the OpenSearch configuration is correct. Also, check the file permissions to ensure OpenSearch can read the file. If the error persists, consider reinstalling the Nori plugin or restarting the OpenSearch service.

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This guide will help you check for common problems that cause the log ” Failed to load nori user dictionary ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, analysis, plugins.

Log Context

Log “Failed to load nori user dictionary” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 try (Reader rulesReader = new StringReader(sb.toString())) {
 } catch (IOException e) {
 LOGGER.error("Failed to load nori user dictionary"; e);
 throw new OpenSearchException("Failed to load nori user dictionary");
 }  public static KoreanTokenizer.DecompoundMode getMode(Settings settings) {
 KoreanTokenizer.DecompoundMode mode = KoreanTokenizer.DEFAULT_DECOMPOUND;


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