apache/flink · error · UnsupportedOperationException

Unsupported type: {}

Error message

Unsupported type: {}

What it means

Error "Unsupported type: {}" thrown in apache/flink.

Source

Thrown at flink-formats/flink-orc/src/main/java/org/apache/flink/orc/OrcSplitReaderUtil.java:214

            case ARRAY:
                ArrayType arrayType = (ArrayType) type;
                return TypeDescription.createList(logicalTypeToOrcType(arrayType.getElementType()));
            case MAP:
                MapType mapType = (MapType) type;
                return TypeDescription.createMap(
                        logicalTypeToOrcType(mapType.getKeyType()),
                        logicalTypeToOrcType(mapType.getValueType()));
            case ROW:
                RowType rowType = (RowType) type;
                TypeDescription struct = TypeDescription.createStruct();
                for (int i = 0; i < rowType.getFieldCount(); i++) {
                    struct.addField(
                            rowType.getFieldNames().get(i),
                            logicalTypeToOrcType(rowType.getChildren().get(i)));
                }
                return struct;
            default:
                throw new UnsupportedOperationException("Unsupported type: " + type);
        }
    }
}

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/145c4482c225aa14. Report an issue: GitHub.