apache/flink · error · UnsupportedOperationException

Schema evolution not supported.

Error message

Schema evolution not supported.

What it means

Error "Schema evolution not supported." thrown in apache/flink.

Source

Thrown at flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/ParquetVectorizedInputFormat.java:259

        return Types.buildMessage().addFields(types).named("flink-parquet");
    }

    private void checkSchema(MessageType fileSchema, MessageType requestedSchema)
            throws IOException, UnsupportedOperationException {
        if (projectedFields.length != requestedSchema.getFieldCount()) {
            throw new RuntimeException(
                    "The quality of field type is incompatible with the request schema!");
        }

        /*
         * Check that the requested schema is supported.
         */
        for (int i = 0; i < requestedSchema.getFieldCount(); ++i) {
            String[] colPath = requestedSchema.getPaths().get(i);
            if (fileSchema.containsPath(colPath)) {
                ColumnDescriptor fd = fileSchema.getColumnDescription(colPath);
                if (!fd.equals(requestedSchema.getColumns().get(i))) {
                    throw new UnsupportedOperationException("Schema evolution not supported.");
                }
            } else {
                if (requestedSchema.getColumns().get(i).getMaxDefinitionLevel() == 0) {
                    // Column is missing in data but the required data is non-nullable. This file is
                    // invalid.
                    throw new IOException(
                            "Required column is missing in data file. Col: "
                                    + Arrays.toString(colPath));
                }
            }
        }
    }

    private Pool<ParquetReaderBatch<T>> createPoolOfBatches(
            SplitT split, MessageType requestedSchema, int numBatches) {
        final Pool<ParquetReaderBatch<T>> pool = new Pool<>(numBatches);

        for (int i = 0; i < numBatches; i++) {

View on GitHub (pinned to 2f3c205e92)

Solutions

1. Address the cause reported by the error message: Schema evolution not supported.
2. Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry.

Example fix

Correct the condition described ("Schema evolution not supported.") and rerun the job or command.

When it happens

Trigger: Triggered at runtime when the operation fails because: Schema evolution not supported.

Common situations: Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Schema evolution not supported.

AI-assisted analysis of apache/flink@2f3c205e92 (2026-08-14). Data as JSON: /api/errors/cdc80bf9b2c2b477. Report an issue: GitHub.