我想修改bigquery-dataflow示例以處理CSV文件。 https://github.com/GoogleCloudPlatform/bigquery-etl-dataflow-sample錯誤：無法編碼空長
我已將readObject改爲解析CSV並將其添加到基準對象。當運行管線我收到以下錯誤：
(2b01c6a9d56ae128): java.lang.RuntimeException: com.google.cloud.dataflow.sdk.coders.CoderException: cannot encode a null Long at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn$1.output(SimpleParDoFn.java:160) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:288) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:450) at com.google.cloud.dataflow.sdk.transforms.MapElements$1.processElement(MapElements.java:109) Caused by: com.google.cloud.dataflow.sdk.coders.CoderException: cannot encode a null Long at com.google.cloud.dataflow.sdk.coders.VarLongCoder.getEncodedElementByteSize(VarLongCoder.java:92) at com.google.cloud.dataflow.sdk.coders.VarLongCoder.getEncodedElementByteSize(VarLongCoder.java:34) at com.google.cloud.dataflow.sdk.coders.StandardCoder.registerByteSizeObserver(StandardCoder.java:185) at com.google.cloud.dataflow.sdk.coders.KvCoder.registerByteSizeObserver(KvCoder.java:156) at com.google.cloud.dataflow.sdk.coders.KvCoder.registerByteSizeObserver(KvCoder.java:42) at com.google.cloud.dataflow.sdk.util.WindowedValue$FullWindowedValueCoder.registerByteSizeObserver(WindowedValue.java:641) at com.google.cloud.dataflow.sdk.util.WindowedValue$FullWindowedValueCoder.registerByteSizeObserver(WindowedValue.java:552) at com.google.cloud.dataflow.sdk.runners.worker.MapTaskExecutorFactory$ElementByteSizeObservableCoder.registerByteSizeObserver(MapTaskExecutorFactory.java:351) at com.google.cloud.dataflow.sdk.util.common.worker.OutputObjectAndByteCounter.update(OutputObjectAndByteCounter.java:125) at com.google.cloud.dataflow.sdk.runners.worker.DataflowOutputCounter.update(DataflowOutputCounter.java:61) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:46) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn$1.output(SimpleParDoFn.java:158) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:288) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:450) at com.google.cloud.dataflow.sdk.transforms.MapElements$1.processElement(MapElements.java:109) at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:49) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:139) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn.processElement(SimpleParDoFn.java:188) at com.google.cloud.dataflow.sdk.runners.worker.ForwardingParDoFn.processElement(ForwardingParDoFn.java:42) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerLoggingParDoFn.processElement(DataflowWorkerLoggingParDoFn.java:47) at com.google.cloud.dataflow.sdk.util.common.worker.ParDoOperation.process(ParDoOperation.java:55) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:52) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:221) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.start(ReadOperation.java:182) at com.google.cloud.dataflow.sdk.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:69) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.executeWork(DataflowWorker.java:285) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.doWork(DataflowWorker.java:221) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.getAndPerformWork(DataflowWorker.java:171) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$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)
請分享您的代碼 –
您使用的是哪種編碼器？你輸出什麼類型的元素？ –