{"record":{"id":"dada1eff1148c4cc","repo":"elastic/elasticsearch","slug":"language-not-support-for-lower-case","errorCode":null,"errorMessage":"language [{}] not support for lower case","messagePattern":"language \\[(.+?)\\] not support for lower case","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/LowerCaseTokenFilterFactory.java","lineNumber":52,"sourceCode":"    private final String lang;\n\n    LowerCaseTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {\n        super(name);\n        this.lang = settings.get(\"language\", null);\n    }\n\n    @Override\n    public TokenStream create(TokenStream tokenStream) {\n        if (lang == null) {\n            return new LowerCaseFilter(tokenStream);\n        } else if (lang.equalsIgnoreCase(\"greek\")) {\n            return new GreekLowerCaseFilter(tokenStream);\n        } else if (lang.equalsIgnoreCase(\"irish\")) {\n            return new IrishLowerCaseFilter(tokenStream);\n        } else if (lang.equalsIgnoreCase(\"turkish\")) {\n            return new TurkishLowerCaseFilter(tokenStream);\n        } else {\n            throw new IllegalArgumentException(\"language [\" + lang + \"] not support for lower case\");\n        }\n    }\n\n}\n","sourceCodeStart":34,"sourceCodeEnd":57,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/LowerCaseTokenFilterFactory.java#L34-L57","documentation":"Error \"language [{}] not support for lower case\" thrown in elastic/elasticsearch.","triggerScenarios":"Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/LowerCaseTokenFilterFactory.java:52 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"db6a809a667c081ca1dc7500389d26975573215f","analyzedAt":"2026-08-12T01:39:14.192Z","schemaVersion":2},"datasetVersion":"2026-08-12T08:17:17.861Z"}