Could not load hunspell dictionary – 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 unable to load the Hunspell dictionary, which is used for text analysis and spell checking. This could be due to a missing or incorrectly named dictionary file, or incorrect file permissions. To resolve this issue, ensure that the dictionary file is present in the correct directory and named correctly. If the file is present, check the file permissions to ensure OpenSearch has the necessary read permissions. If the issue persists, consider reinstalling or updating the Hunspell plugin.

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This guide will help you check for common problems that cause the log ” Could not load hunspell dictionary [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: indices, analysis.

Log Context

Log “Could not load hunspell dictionary [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            try (Directory tmp = new NIOFSDirectory(env.tmpFile())) {
                return new Dictionary(tmp; "hunspell"; affixStream; dicStreams; ignoreCase);

        } catch (Exception e) {
            logger.error(() -> new ParameterizedMessage("Could not load hunspell dictionary [{}]"; locale); e);
            throw e;
        } finally {


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