{"record":{"id":"bb09b4dc7c03c547","repo":"apache/flink","slug":"row-length-mismatch-s-fields-expected-but-was-s-bb09b4","errorCode":null,"errorMessage":"Row length mismatch. %s fields expected but was %s.","messagePattern":"Row length mismatch\\. (.+?) fields expected but was (.+?)\\.","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/RowCsvInputFormat.java","lineNumber":316,"sourceCode":"        };\n    }\n\n    private static RuntimeConverter createByteArrayRuntimeConverter(boolean ignoreParseErrors) {\n        return (node) -> {\n            try {\n                return node.binaryValue();\n            } catch (IOException e) {\n                if (!ignoreParseErrors) {\n                    throw new RuntimeException(\"Unable to deserialize byte array.\", e);\n                }\n                return null;\n            }\n        };\n    }\n\n    static void validateArity(int expected, int actual, boolean ignoreParseErrors) {\n        if (expected != actual && !ignoreParseErrors) {\n            throw new RuntimeException(\n                    \"Row length mismatch. \"\n                            + expected\n                            + \" fields expected but was \"\n                            + actual\n                            + \".\");\n        }\n    }\n\n    /** Create a builder. */\n    public static Builder builder(TypeInformation<Row> typeInfo, Path... filePaths) {\n        return new Builder(typeInfo, filePaths);\n    }\n\n    /** A builder for creating a {@link RowCsvInputFormat}. */\n    public static class Builder implements Serializable {\n\n        private final Path[] filePaths;\n        private final TypeInformation[] fieldTypes;","sourceCodeStart":298,"sourceCodeEnd":334,"githubUrl":"https://github.com/apache/flink/blob/2f3c205e9266cb30240eb7f4fdab15cad629a70f/flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/RowCsvInputFormat.java#L298-L334","documentation":"Error \"Row length mismatch. %s fields expected but was %s.\" thrown in apache/flink.","triggerScenarios":"Triggered at runtime when the operation fails because: Row length mismatch. the reported value fields expected but was the reported value.","commonSituations":"Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Row length mismatch. the reported value fields expected but was the reported value.","solutions":["Address the cause reported by the error message: Row length mismatch. the reported value fields expected but was the reported value.","Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry."],"exampleFix":"Correct the condition described (\"Row length mismatch. the reported value fields expected but was 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"}