elastic/elasticsearch · error · IllegalArgumentException

Exception while reading hyphenation_patterns_path.

Error message

Exception while reading hyphenation_patterns_path.

What it means

Error "Exception while reading hyphenation_patterns_path." thrown in elastic/elasticsearch.

Source

Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/HyphenationCompoundWordTokenFilterFactory.java:49

    private final boolean noSubMatches;
    private final boolean noOverlappingMatches;
    private final HyphenationTree hyphenationTree;

    HyphenationCompoundWordTokenFilterFactory(IndexSettings indexSettings, Environment env, String name, Settings settings) {
        super(indexSettings, env, name, settings);

        String hyphenationPatternsPath = settings.get("hyphenation_patterns_path", null);
        if (hyphenationPatternsPath == null) {
            throw new IllegalArgumentException("hyphenation_patterns_path is a required setting.");
        }

        Path hyphenationPatternsFile = env.configDir().resolve(hyphenationPatternsPath);

        try {
            InputStream in = Files.newInputStream(hyphenationPatternsFile);
            hyphenationTree = HyphenationCompoundWordTokenFilter.getHyphenationTree(new InputSource(in));
        } catch (Exception e) {
            throw new IllegalArgumentException("Exception while reading hyphenation_patterns_path.", e);
        }

        noSubMatches = settings.getAsBoolean("no_sub_matches", false);
        noOverlappingMatches = settings.getAsBoolean("no_overlapping_matches", false);
    }

    @Override
    public TokenStream create(TokenStream tokenStream) {
        return new HyphenationCompoundWordTokenFilter(
            tokenStream,
            hyphenationTree,
            wordList,
            minWordSize,
            minSubwordSize,
            maxSubwordSize,
            onlyLongestMatch,
            noSubMatches,
            noOverlappingMatches

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/HyphenationCompoundWordTokenFilterFactory.java:49 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/9a90a1dc73355af0. Report an issue: GitHub.