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XmlSource.fromCloud Storage バケットに保存されている XML ファイルから読み取るために使用しています。

 XmlSource<Data> source = XmlSource.<Data>from("gs://<my-url>/TestData.xml")
        .withRootElement("data")
        .withRecordElement("record")
        .withRecordClass(Data.class);

p.apply(Read.from(source))
        .apply(RemoveDuplicates.<Data>create())
        .apply(ParDo.of(new XMLPipeline.CreateItemQtyMapping()))
        .apply(Combine.<String, Integer>perKey(new SumIntegers()))
        .apply("FormatResults", MapElements.via(
                new SimpleFunction<KV<String, Integer>, String>() {
                  @Override
                  public String apply(KV<String, Integer> input) {
                    return input.getKey() + "," + input.getValue();
                  }
                }))
        .apply(TextIO.Write.to("gs://<my-url>.appspot.com/pos-pipeline-output/ItemCounts"));

p.run();

しかし、私はこの例外を受けています:

017-01-09T14:01:31.107Z: Error:   (c88c756cabe0dbec): java.io.IOException: Failed to start reading from source: StaticValueProvider{value=gs://<my-url>/TestData.xml} range [48524, 97048)
at com.google.cloud.dataflow.sdk.runners.worker.WorkerCustomSources$BoundedReaderIterator.start(WorkerCustomSources.java:534)
at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation$SynchronizedReaderIterator.start(ReadOperation.java:387)
at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:217)
at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.start(ReadOperation.java:182)
at com.google.cloud.dataflow.sdk.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:69)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.executeWork(DataflowWorker.java:284)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.doWork(DataflowWorker.java:220)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.getAndPerformWork(DataflowWorker.java:170)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.doWork(DataflowWorkerHarness.java:192)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:172)
at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:159)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: com.sun.xml.internal.stream.XMLInputFactoryImpl cannot be cast to org.codehaus.stax2.XMLInputFactory2
    at com.google.cloud.dataflow.sdk.io.XmlSource$XMLReader.setUpXMLParser(XmlSource.java:490)
    at com.google.cloud.dataflow.sdk.io.XmlSource$XMLReader.startReading(XmlSource.java:356)
    at com.google.cloud.dataflow.sdk.io.FileBasedSource$FileBasedReader.startImpl(FileBasedSource.java:528)
    at com.google.cloud.dataflow.sdk.io.OffsetBasedSource$OffsetBasedReader.start(OffsetBasedSource.java:281)
    at com.google.cloud.dataflow.sdk.runners.worker.WorkerCustomSources$BoundedReaderIterator.start(WorkerCustomSources.java:531)
    ... 14 more

これらは私のpom.xmlの依存関係です:

<dependencies>
<dependency>
  <groupId>com.google.cloud.dataflow</groupId>
  <artifactId>google-cloud-dataflow-java-sdk-all</artifactId>
  <version>1.9.0</version>
</dependency>

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-storage</artifactId>
  <version>0.7.0</version>
</dependency>

<dependency>
  <groupId>org.codehaus.woodstox</groupId>
  <artifactId>stax2-api</artifactId>
  <version>4.0.0</version>
</dependency>

ここで何が問題なのかわかりません。誰かがいくつかの指針を教えてもらえますか?

ありがとう、

アビシェーク

4

2 に答える 2

1

これは少し微妙ですが、適切なランタイム依存関係も含める必要があるようです。https://cloud.google.com/dataflow/java-sdk/JavaDoc/com/google/cloud/dataflow/sdk/io/XmlSourceによると、次のことを行います。

  1. org.codehaus.woodstox:stax2-api への依存関係を明示的に宣言する

  2. org.codehaus.woodstox:woodstox-core-asl など、互換性のある実装を実行時にクラスパスに含めます。

#1 は正しく実行されましたが、#2 は正しく実行されていないようです。

于 2017-01-10T17:26:17.133 に答える