{"record":{"id":"cd0312094d919850","repo":"apache/flink","slug":"fail-to-serialize-at-field-s-cd0312","errorCode":null,"errorMessage":"Fail to serialize at field: %s.","messagePattern":"Fail to serialize at field: (.+?)\\.","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/RowDataToCsvConverters.java","lineNumber":111,"sourceCode":"                        .map(RowType.RowField::getType)\n                        .toArray(LogicalType[]::new);\n        final String[] fieldNames = type.getFieldNames().toArray(new String[0]);\n        final RowFieldConverter[] fieldConverters =\n                Arrays.stream(fieldTypes)\n                        .map(RowDataToCsvConverters::createNullableRowFieldConverter)\n                        .toArray(RowFieldConverter[]::new);\n        final int rowArity = type.getFieldCount();\n        return (row, context) -> {\n            // top level reuses the object node container\n            final ObjectNode objectNode = (ObjectNode) context.container;\n            for (int i = 0; i < rowArity; i++) {\n                try {\n                    objectNode.set(\n                            fieldNames[i],\n                            fieldConverters[i].convert(\n                                    context.csvMapper, context.container, row, i));\n                } catch (Throwable t) {\n                    throw new RuntimeException(\n                            String.format(\"Fail to serialize at field: %s.\", fieldNames[i]), t);\n                }\n            }\n            return objectNode;\n        };\n    }\n\n    private static RowFieldConverter createNullableRowFieldConverter(LogicalType fieldType) {\n        final RowFieldConverter fieldConverter = createRowFieldConverter(fieldType);\n        return (csvMapper, container, row, pos) -> {\n            if (row.isNullAt(pos)) {\n                return container.nullNode();\n            }\n            return fieldConverter.convert(csvMapper, container, row, pos);\n        };\n    }\n\n    private static RowFieldConverter createRowFieldConverter(LogicalType fieldType) {","sourceCodeStart":93,"sourceCodeEnd":129,"githubUrl":"https://github.com/apache/flink/blob/2f3c205e9266cb30240eb7f4fdab15cad629a70f/flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/RowDataToCsvConverters.java#L93-L129","documentation":"Error \"Fail to serialize at field: %s.\" thrown in apache/flink.","triggerScenarios":"Triggered at runtime when the operation fails because: Fail to serialize at field: the reported value.","commonSituations":"Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Fail to serialize at field: the reported value.","solutions":["Address the cause reported by the error message: Fail to serialize at field: the reported value.","Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry."],"exampleFix":"Correct the condition described (\"Fail to serialize at field: the reported value.\") and rerun the job or command.","handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2f3c205e9266cb30240eb7f4fdab15cad629a70f","analyzedAt":"2026-08-14T08:48:24.518Z","schemaVersion":2},"datasetVersion":"2026-08-14T10:17:34.591Z"}