{"record":{"id":"95a9c0b3062568ed","repo":"apache/cassandra","slug":"syntax-error-parsing-s-at-char-d-unexpected-e","errorCode":null,"errorMessage":"Syntax error parsing '%s' at char %d: unexpected end of string","messagePattern":"Syntax error parsing '(.+?)' at char (.+?): unexpected end of string","errorType":"validation","errorClass":"SyntaxException","httpStatus":null,"severity":"error","filePath":"src/java/org/apache/cassandra/db/marshal/TypeParser.java","lineNumber":238,"sourceCode":"                return map;\n            }\n\n            String k = readNextIdentifier();\n            String v = \"\";\n            skipBlank();\n            if (str.charAt(idx) == '=')\n            {\n                ++idx;\n                skipBlank();\n                v = readNextIdentifier();\n            }\n            else if (str.charAt(idx) != ',' && str.charAt(idx) != ')')\n            {\n                throwSyntaxError(\"unexpected character '\" + str.charAt(idx) + \"'\");\n            }\n            map.put(k, v);\n        }\n        throw new SyntaxException(String.format(\"Syntax error parsing '%s' at char %d: unexpected end of string\", str, idx));\n    }\n\n    public static String stringifyVectorParameters(AbstractType<?> type, boolean ignoreFreezing, int dimension)\n    {\n        return \"(\" + type.toString(ignoreFreezing) + \" , \" + dimension + \")\";\n    }\n\n    public Vector getVectorParameters()\n    {\n        if (isEOS())\n            return null;\n        if (str.charAt(idx) != '(')\n            throw new IllegalStateException();\n\n        ++idx; // skipping '('\n        AbstractType<?> type = parse();\n        if (!skipBlankAndComma())\n            throw new IllegalStateException();","sourceCodeStart":220,"sourceCodeEnd":256,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/db/marshal/TypeParser.java#L220-L256","documentation":"TypeParser.getKeyValueParameters() parses a parenthesized key=value parameter list (used by types like DynamicCompositeType). This SyntaxException is thrown when the string ends before the closing ')' is found — the parameter list was opened with '(' but never properly closed.","triggerScenarios":"Calling getKeyValueParameters() on a TypeParser whose string has '(' but the loop exits via skipBlankAndComma() returning false because the parser reached end-of-string before seeing ')', e.g. TypeParser.parse(\"DynamicCompositeType(a=BytesType\") or \"DynamicCompositeType(a=BytesType, \".","commonSituations":"Typos in comparator strings in schema definitions (cqlsh CREATE TABLE ... WITH comparator options), hand-edited cassandra-cli comparator metadata, migration scripts carrying truncated type strings, or programmatic AbstractType.parse() calls with unbalanced parentheses.","solutions":["Balance the parentheses in the type string: every '(' needs a matching ')', e.g. DynamicCompositeType(a=BytesType, b=UTF8Type)","Check the char index in the message to see where the parser ran off the end; look for truncation or a swallowed closing paren there","If the string comes from stored schema metadata, fix it via ALTER TABLE or schema repair before restarting nodes","Validate the type string with AbstractType.parse() in a test or cqlsh before applying it to production schema"],"exampleFix":"// before\nAbstractType.parse(\"DynamicCompositeType(a = UTF8Type\");\n// after\nAbstractType.parse(\"DynamicCompositeType(a = UTF8Type)\");","handlingStrategy":"try-catch","validationCode":"static void validateTypeString(String s) {\n    long open = s.chars().filter(c -> c == '(').count();\n    long close = s.chars().filter(c -> c == ')').count();\n    if (open != close || s.trim().endsWith(\"(\"))\n        throw new IllegalArgumentException(\"Unbalanced parentheses in type string: \" + s);\n}","typeGuard":"static boolean isBalanced(String s) {\n    int depth = 0;\n    for (char c : s.toCharArray()) {\n        if (c == '(') depth++;\n        else if (c == ')') depth--;\n        if (depth < 0) return false;\n    }\n    return depth == 0;\n}","tryCatchPattern":"try {\n    AbstractType<?> type = TypeParser.parse(typeString);\n} catch (SyntaxException e) {\n    logger.error(\"Invalid type string, check parentheses: {}\", e.getMessage());\n    throw new SchemaConfigurationException(\"Malformed type definition\", e);\n}","preventionTips":["Always balance parentheses — count '(' vs ')' before submitting schema changes","Build parameterized type strings with helper methods like stringifyTKeyValueParameters instead of manual concatenation","Test type strings with AbstractType.parse() in a unit test before applying them to a cluster"],"tags":["cassandra","type-parser","syntax-exception","unbalanced-parentheses"],"backgroundTag":"invalid-argument-format","analyzedSha":"88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1","analyzedAt":"2026-09-10T07:29:22.284Z","contentChangedAt":"2026-09-10T07:29:22.284Z","schemaVersion":2},"datasetVersion":"2026-09-17T15:17:12.973Z"}