问题源于具有并行化和异步处理功能的Apache Beam框架可能无法保证数据流在目标文件中以正确的顺序写入。为了解决这个问题，可以使用有序写入器（OrderedWriter）来确保记录按正确的顺序写入目标文件。以下是一个Java代码示例，演示如何使用有序写入器来解决此问题：

PCollection records = ...; // input PCollection
PCollectionView filenamesView = ...; // PCollectionView of the filenames to write to
final TupleTag doneTag = new TupleTag<>();
//Create a new PCollection by assigning a unique, increasing ID to each element
PCollection> keyedRecords =
        records.apply("AddUniqueIds", WithKeys.of((Void) null)).setCoder(KvCoder.of(VarIntCoder.of(), MyRecordCoder.of()));
//Group all elements assigned with the same key (null), and sort all records by id.
PCollection sortedRecords =
        PCollectionList.of(keyedRecords.apply(GroupByKey.create()))
                .apply(ParDo.of(new DoFn>, MyRecord>() {
                    @ProcessElement
                    public void processElement(ProcessContext context) {
                        List sorted = new ArrayList<>();
                        for (MyRecord r : context.element().getValue()) {
                            sorted.add(r);
                        }
                        Collections.sort(sorted, new Comparator() {
                            @Override
                            public int compare(MyRecord o1, MyRecord o2) {
                                // Assumes that MyRecord has a method that returns its id as an int.
                                return Long.compare(o1.getId(), o2.getId());
                            }
                        });
                        for (MyRecord r : sorted) {
                            context.output(r);
                        }
                    }
                })).setCoder(MyRecordCoder.of());
// Create a new representation of the input PCollection where each element is a tuple containing
// the filename and the record it belongs to.
// For example, if the input file was records 0, 1, 2, 3, 4, 5, 6, the output would be:
// ("file0", record 0), ("file1", record 1), ("file2", record 2), ("file3", record 3), ...
final PCollection> keyedOutput = sortedRecords
        .apply("AssignFilename", ParDo.of(new DoFn>() {
            @ProcessElement
            public void processElement(ProcessContext context) {
                List filenames = context.sideInput