DATAX hdfsreader orc格式读取数据丢失问题

最近做一个数据同步任务，从hive仓库同步数据到pg，Hive有4000w多条数据，但datax只同步了280w就结束了，也没有任何报错。

看了下datax源码，找到HdfsReader模块DFSUtil核心实现源码读取orc格式的文件方法：

public void orcFileStartRead(String sourceOrcFilePath, Configuration readerSliceConfig,
                             RecordSender recordSender, TaskPluginCollector taskPluginCollector) {
    LOG.info(String.format("Start Read orcfile [%s].", sourceOrcFilePath));
    List column = UnstructuredStorageReaderUtil
            .getListColumnEntry(readerSliceConfig, com.alibaba.datax.plugin.unstructuredstorage.reader.Key.COLUMN);
    String nullFormat = readerSliceConfig.getString(com.alibaba.datax.plugin.unstructuredstorage.reader.Key.NULL_FORMAT);
    StringBuilder allColumns = new StringBuilder();
    StringBuilder allColumnTypes = new StringBuilder();
    boolean isReadAllColumns = false;
    int columnIndexMax = -1;
    // 判断是否读取所有列
    if (null == column || column.size() == 0) {
        int allColumnsCount = getAllColumnsCount(sourceOrcFilePath);
        columnIndexMax = allColumnsCount - 1;
        isReadAllColumns = true;
    } else {
        columnIndexMax = getMaxIndex(column);
    }
    for (int i = 0; i <= columnIndexMax; i++) {
        allColumns.append("col");
        allColumnTypes.append("string");
        if (i != columnIndexMax) {
            allColumns.append(",");
            allColumnTypes.append(":");
        }
    }
    if (columnIndexMax >= 0) {
        JobConf conf = new JobConf(hadoopConf);
        Path orcFilePath = new Path(sourceOrcFilePath);
        Properties p = new Properties();
        p.setProperty("columns", allColumns.toString());
        p.setProperty("columns.types", allColumnTypes.toString());
        try {
            OrcSerde serde = new OrcSerde();
            serde.initialize(conf, p);
            StructObjectInspector inspector = (StructObjectInspector)                 serde.getObjectInspector();
            InputFormat in = new OrcInputFormat();
            FileInputFormat.setInputPaths(conf, orcFilePath.toString());

            //If the network disconnected, will retry 45 times, each time the retry interval for 20 seconds
            //Each file as a split
            //TODO multy threads
            InputSplit[] splits = in.getSplits(conf, -1);

            RecordReader reader = in.getRecordReader(splits[0], conf, Reporter.NULL);
            Object key = reader.createKey();
            Object value = reader.createValue();
            // 获取列信息
            List fields = inspector.getAllStructFieldRefs();

            List