private void checkReadException() {
        if (readException != null) {
            throw new FlinkRuntimeException(
                    String.format(
                            "Read split %s error due to %s.",
                            currentSnapshotSplit, readException.getMessage()),
                    readException);
        }
    }
Fetcher to fetch data from table split, the split is the snapshot split {@link SnapshotSplit}.
Copy from com.ververica:flink-cdc-base:2.3.0.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/source/reader/external/IncrementalSourceScanFetcher.java