{"record":{"id":"9c3a024c9999e72e","repo":"apache/cassandra","slug":"not-enough-bytes-to-read-dth-field-s-9c3a02","errorCode":null,"errorMessage":"Not enough bytes to read %dth field %s","messagePattern":"Not enough bytes to read (.+?)th field (.+?)","errorType":"validation","errorClass":"MarshalException","httpStatus":null,"severity":"error","filePath":"src/java/org/apache/cassandra/serializers/UserTypeSerializer.java","lineNumber":58,"sourceCode":"        for (Entry<String, TypeSerializer<?>> entry : fields.entrySet())\n        {\n            i++;\n            // we allow the input to have less fields than declared so as to support field addition.\n            if (accessor.isEmptyFromOffset(input, offset))\n                return;\n\n            if (accessor.sizeFromOffset(input, offset) < 4)\n                throw new MarshalException(String.format(\"Not enough bytes to read size of %dth field %s\", i, entry.getKey()));\n\n            int size = accessor.getInt(input, offset);\n            offset += TypeSizes.INT_SIZE;\n\n            // size < 0 means null value\n            if (size < 0)\n                continue;\n\n            if (accessor.sizeFromOffset(input, offset) < size)\n                throw new MarshalException(String.format(\"Not enough bytes to read %dth field %s\", i, entry.getKey()));\n\n            V field = accessor.slice(input, offset, size);\n            try\n            {\n                offset += size;\n                entry.getValue().validate(field, accessor);\n            }\n            catch (MarshalException e)\n            {\n                throw new MarshalException(String.format(\"Failure validating the %dth field %s; %s\", i, entry.getKey(), e.getMessage()), e);\n            }\n        }\n\n        // We're allowed to get less fields than declared, but not more\n        if (!accessor.isEmptyFromOffset(input, offset))\n            throw new MarshalException(\"Invalid remaining data after end of UDT value\");\n    }\n}","sourceCodeStart":40,"sourceCodeEnd":76,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/serializers/UserTypeSerializer.java#L40-L76","documentation":"Thrown during UDT value deserialization when the serialized buffer runs out of bytes before the i-th declared field can be read (fewer than 4 bytes for its size prefix, or an empty buffer for remaining fields). Fires on corrupt or truncated UDT payloads; having fewer fields than declared is otherwise tolerated.","triggerScenarios":"Thrown at src/java/org/apache/cassandra/serializers/UserTypeSerializer.java:58 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Verify each field's serialized length matches the written size prefix","Re-serialize with the correct UDT type; check writer/reader type-definition drift","Inspect the payload for corruption"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"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"}