{"record":{"id":"075e508064cdb7da","repo":"apache/flink","slug":"parquet-with-case-insensitive-mode-should-have-no","errorCode":null,"errorMessage":"Parquet with case insensitive mode should have no duplicate key: {}","messagePattern":"Parquet with case insensitive mode should have no duplicate key: (.+?)","errorType":"exception","errorClass":"FlinkRuntimeException","httpStatus":null,"severity":"error","filePath":"flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/ParquetVectorizedInputFormat.java","lineNumber":214,"sourceCode":"                            \"{} does not exist in {}, will fill the field with null.\",\n                            fieldName,\n                            parquetSchema);\n                    types[i] =\n                            ParquetSchemaConverter.convertToParquetType(\n                                    fieldName, projectedTypes[i], config);\n                    unknownFieldsIndices.add(i);\n                } else {\n                    types[i] = parquetSchema.getType(fieldName);\n                }\n            }\n        } else {\n            Map<String, Type> caseInsensitiveFieldMap = new HashMap<>();\n            for (Type type : parquetSchema.getFields()) {\n                caseInsensitiveFieldMap.compute(\n                        type.getName().toLowerCase(Locale.ROOT),\n                        (key, previousType) -> {\n                            if (previousType != null) {\n                                throw new FlinkRuntimeException(\n                                        \"Parquet with case insensitive mode should have no duplicate key: \"\n                                                + key);\n                            }\n                            return type;\n                        });\n            }\n            for (int i = 0; i < projectedFields.length; ++i) {\n                Type type =\n                        caseInsensitiveFieldMap.get(projectedFields[i].toLowerCase(Locale.ROOT));\n                if (type == null) {\n                    LOG.warn(\n                            \"{} does not exist in {}, will fill the field with null.\",\n                            projectedFields[i],\n                            parquetSchema);\n                    type =\n                            ParquetSchemaConverter.convertToParquetType(\n                                    projectedFields[i].toLowerCase(Locale.ROOT),\n                                    projectedTypes[i],","sourceCodeStart":196,"sourceCodeEnd":232,"githubUrl":"https://github.com/apache/flink/blob/2f3c205e9266cb30240eb7f4fdab15cad629a70f/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/ParquetVectorizedInputFormat.java#L196-L232","documentation":"Error \"Parquet with case insensitive mode should have no duplicate key: {}\" thrown in apache/flink.","triggerScenarios":"Triggered at runtime when the operation fails because: Parquet with case insensitive mode should have no duplicate key: the reported value.","commonSituations":"Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Parquet with case insensitive mode should have no duplicate key: the reported value.","solutions":["Address the cause reported by the error message: Parquet with case insensitive mode should have no duplicate key: the reported value","Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry."],"exampleFix":"Correct the condition described (\"Parquet with case insensitive mode should have no duplicate key: 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"}