{"record":{"id":"555b0f2e0a9a2af0","repo":"apache/cassandra","slug":"failure-validating-the-dth-field-s-s","errorCode":null,"errorMessage":"Failure validating the %dth field %s; %s","messagePattern":"Failure validating the (.+?)th field (.+?); (.+?)","errorType":"validation","errorClass":"MarshalException","httpStatus":null,"severity":"error","filePath":"src/java/org/apache/cassandra/serializers/UserTypeSerializer.java","lineNumber":68,"sourceCode":"            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}\n","sourceCodeStart":50,"sourceCodeEnd":77,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/serializers/UserTypeSerializer.java#L50-L77","documentation":"MarshalException wrapper from UserTypeSerializer.validate: the nested serializer for the named field rejected the value; the original MarshalException message and cause are chained into a message identifying the offending field index and name. It is a generic delegation guard, not an independent validation.","triggerScenarios":"Thrown at src/java/org/apache/cassandra/serializers/UserTypeSerializer.java:68 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Read the chained cause message to find the actual field-level violation","Fix the offending field value client-side to conform to its declared type","Check that the UDT field type in the schema matches what the client sends"],"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"}