public static int chunkId(String splitId) {
        return Integer.parseInt(splitId.substring(splitId.lastIndexOf(":") + 1));
    }
get chunk id from split id
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/utils/ChunkUtils.java