{"record":{"id":"00f2a3e7be0e6ebf","repo":"apache/seatunnel","slug":"the-data-does-not-match-the-configured-schema-info-00f2a3","errorCode":null,"errorMessage":"The data does not match the configured schema information, please check","messagePattern":"The data does not match the configured schema information, please check","errorType":"exception","errorClass":"IndexOutOfBoundsException","httpStatus":null,"severity":"error","filePath":"seatunnel-formats/seatunnel-format-text/src/main/java/org/apache/seatunnel/format/text/TextSerializationSchema.java","lineNumber":160,"sourceCode":"        }\n\n        public TextSerializationSchema build() {\n            return new TextSerializationSchema(\n                    seaTunnelRowType,\n                    separators,\n                    dateFormatter,\n                    dateTimeFormatter,\n                    timeFormatter,\n                    charset,\n                    nullValue,\n                    wallClockTimestampTz);\n        }\n    }\n\n    @Override\n    public byte[] serialize(SeaTunnelRow element) {\n        if (element.getFields().length != seaTunnelRowType.getTotalFields()) {\n            throw new IndexOutOfBoundsException(\n                    \"The data does not match the configured schema information, please check\");\n        }\n        Object[] fields = element.getFields();\n        String[] strings = new String[fields.length];\n        for (int i = 0; i < fields.length; i++) {\n            strings[i] = convert(fields[i], seaTunnelRowType.getFieldType(i), 0);\n        }\n        return String.join(separators[0], strings).getBytes(charset);\n    }\n\n    private String convert(Object field, SeaTunnelDataType<?> fieldType, int level) {\n        if (field == null) {\n            return nullValue;\n        }\n        switch (fieldType.getSqlType()) {\n            case DOUBLE:\n            case FLOAT:\n            case INT:","sourceCodeStart":142,"sourceCodeEnd":178,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-formats/seatunnel-format-text/src/main/java/org/apache/seatunnel/format/text/TextSerializationSchema.java#L142-L178","documentation":"TextSerializationSchema.serialize throws IndexOutOfBoundsException with this message when the incoming SeaTunnelRow's field count differs from the configured SeaTunnelRowType's total field count. The text format writes fields positionally against the declared schema, so mismatched arity cannot be serialized safely.","triggerScenarios":"Calling serialize with a row whose fields array length != seaTunnelRowType.getTotalFields() — e.g. an upstream transform added/removed columns, the source schema changed after the sink schema was fixed, or a manually built row with the wrong number of fields.","commonSituations":"Catalog table schema edited without updating the upstream transform; CDC pipelines where different event kinds produce different field counts; dynamic columns arriving that the static schema does not declare.","solutions":["Compare element.getFields().length with the configured schema's totalFields to find where they diverge","Fix the upstream transform/source so it emits exactly the declared number of fields","Update the sink catalog table schema to match the actual row structure","Insert a transform that pads/trims fields to the schema arity before serialization"],"exampleFix":"// before\n// transform drops a column -> row has 3 fields, schema expects 4\n\n// after\nSeaTunnelRow out = new SeaTunnelRow(4);\nout.setField(3, defaultValue); // fill the removed column's slot","handlingStrategy":"validation","validationCode":"if (element.getFields().length != seaTunnelRowType.getTotalFields()) {\n    throw new IllegalStateException(\"Row arity \" + element.getFields().length\n        + \" != schema arity \" + seaTunnelRowType.getTotalFields());\n}","typeGuard":"boolean matchesSchema(SeaTunnelRow row, SeaTunnelRowType type) {\n    return row.getFields() != null && row.getFields().length == type.getTotalFields();\n}","tryCatchPattern":"try {\n    byte[] out = textSchema.serialize(row);\n} catch (IndexOutOfBoundsException e) {\n    log.error(\"Row/schema field count mismatch: {}\", e.getMessage(), e);\n    throw e;\n}","preventionTips":["Keep upstream transforms and sink catalog schemas in sync; change them together","Assert row arity in a unit test for every transform stage","Avoid dynamic column counts in text-format pipelines"],"tags":["text-format","serialization","schema-mismatch"],"backgroundTag":"schema-validation-failed","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}