apache/flink · error · UnsupportedOperationException

Unsupported type: %s

Error message

Unsupported type: %s

What it means

Error "Unsupported type: %s" thrown in apache/flink.

Source

Thrown at flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/RowDataToCsvConverters.java:186

            case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
                final int zonedTimestampPrecision =
                        ((LocalZonedTimestampType) fieldType).getPrecision();
                return (csvMapper, container, row, pos) ->
                        convertTimestamp(
                                row.getTimestamp(pos, zonedTimestampPrecision),
                                container,
                                SQL_TIMESTAMP_WITH_LOCAL_TIMEZONE_FORMAT);
            case DECIMAL:
                return createDecimalRowFieldConverter((DecimalType) fieldType);
            case ARRAY:
                return createArrayRowFieldConverter((ArrayType) fieldType);
            case ROW:
                return createRowRowFieldConverter((RowType) fieldType);
            case MAP:
            case MULTISET:
            case RAW:
            default:
                throw new UnsupportedOperationException("Unsupported type: " + fieldType);
        }
    }

    private static ArrayElementConverter createNullableArrayElementConverter(
            LogicalType fieldType) {
        final ArrayElementConverter elementConverter = createArrayElementConverter(fieldType);
        return (csvMapper, container, array, pos) -> {
            if (array.isNullAt(pos)) {
                return container.nullNode();
            }
            return elementConverter.convert(csvMapper, container, array, pos);
        };
    }

    private static ArrayElementConverter createArrayElementConverter(LogicalType fieldType) {
        switch (fieldType.getTypeRoot()) {
            case NULL:
                return (csvMapper, container, array, pos) -> container.nullNode();

View on GitHub (pinned to 2f3c205e92)

Solutions

1. Address the cause reported by the error message: Unsupported type: the reported value
2. Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry.

Example fix

Correct the condition described ("Unsupported type: the reported value") and rerun the job or command.

When it happens

Trigger: Triggered at runtime when the operation fails because: Unsupported type: the reported value.

Common situations: Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Unsupported type: the reported value.

AI-assisted analysis of apache/flink@2f3c205e92 (2026-08-14). Data as JSON: /api/errors/1098fa9ec68e93be. Report an issue: GitHub.