{"record":{"id":"a03ca77868d38ad6","repo":"elastic/elasticsearch","slug":"token-filter-cannot-be-used-to-parse-synonyms-a03ca7","errorCode":null,"errorMessage":"Token filter [{}] cannot be used to parse synonyms","messagePattern":"Token filter \\[(.+?)\\] cannot be used to parse synonyms","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/FingerprintTokenFilterFactory.java","lineNumber":43,"sourceCode":"    private final char separator;\n    private final int maxOutputSize;\n\n    FingerprintTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {\n        super(name);\n        this.separator = FingerprintAnalyzerProvider.parseSeparator(settings);\n        this.maxOutputSize = settings.getAsInt(MAX_OUTPUT_SIZE.getPreferredName(), DEFAULT_MAX_OUTPUT_SIZE);\n    }\n\n    @Override\n    public TokenStream create(TokenStream tokenStream) {\n        TokenStream result = tokenStream;\n        result = new FingerprintFilter(result, maxOutputSize, separator);\n        return result;\n    }\n\n    @Override\n    public TokenFilterFactory getSynonymFilter() {\n        throw new IllegalArgumentException(\"Token filter [\" + name() + \"] cannot be used to parse synonyms\");\n    }\n\n}\n","sourceCodeStart":25,"sourceCodeEnd":47,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/FingerprintTokenFilterFactory.java#L25-L47","documentation":"Error \"Token filter [{}] cannot be used to parse synonyms\" thrown in elastic/elasticsearch.","triggerScenarios":"Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/FingerprintTokenFilterFactory.java:43 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"db6a809a667c081ca1dc7500389d26975573215f","analyzedAt":"2026-08-12T01:39:14.192Z","schemaVersion":2},"datasetVersion":"2026-08-12T12:31:55.035Z"}