Google Cloud Dataflow管道中的例外情况从BigQuery到Cloud Bigtable

Question

执行DataFlow管道时，我们每隔一段时间就会看到这些例外情况。我们能为他们做些什么吗？我们有一个非常简单的流程，它从BigQuery查询中读取数据并在BigTable中填充数据。

另外管道内的数据会发生什么变化？它是否被重新处理？还是在传输到BigTable时丢失了？

CloudBigtableIO.initializeForWrite(p); 
    p.apply(BigQueryIO.Read.fromQuery(getQuery())) 
    .apply(ParDo.of(new DoFn<TableRow, Mutation>() { 
      public void processElement(ProcessContext c) { 
      Mutation output = convertDataToRow(c.element()); 
      c.output(output); 
      } 

      })) 
     .apply(CloudBigtableIO.writeToTable(config)); 


private static Mutation convertDataToRow(TableRow element) { 
    LOG.info("element: "+ element); 
    LOG.info("BASM_segment_id: "+ element.get("BASM_segment_id")); 
    if(element.get("BASM_AID") != null){ 
     Put obj = new Put(getRowKey(element).getBytes()).addColumn(SEGMENT_FAMILY, SEGMENT_COLUMN_NAME, ((String)element.get("BAS_category")).getBytes()); 
       obj.addColumn(USER_FAMILY, "AID".getBytes(), ((String)element.get("BASM_AID")).getBytes()); 
     if(element.get("BASM_segment_id") != null){ 
       obj.addColumn(SEGMENT_FAMILY, "segment_id".getBytes(), ((String)element.get("BASM_segment_id")).getBytes()); 
     } 
     if(element.get("BAS_sub_category") != null){ 
       obj.addColumn(SEGMENT_FAMILY, "sub_category".getBytes(), ((String)element.get("BAS_sub_category")).getBytes()); 
     } 
     if(element.get("BAS_name") != null){ 
       obj.addColumn(SEGMENT_FAMILY, "name".getBytes(), ((String)element.get("BAS_name")).getBytes()); 
     } 
     if(element.get("BAS_description") != null){ 
       obj.addColumn(SEGMENT_FAMILY, "description".getBytes(), ((String)element.get("BAS_description")).getBytes()); 
     } 
     if(element.get("BAS_last_compute_day") != null){obj.addColumn(USER_FAMILY, "Krux_User_id".getBytes(), ((String)element.get("BASM_krux_user_id")).getBytes()); 
       obj.addColumn(SEGMENT_FAMILY, "last_compute_day".getBytes(), ((String)element.get("BAS_last_compute_day")).getBytes()); 
     } 
     if(element.get("BAS_type") != null){ 
       obj.addColumn(SEGMENT_FAMILY, "type".getBytes(), ((String)element.get("BAS_type")).getBytes()); 
     }  
     if(element.get("BASM_REGID") != null){ 
       obj.addColumn(USER_FAMILY, "REGID".getBytes(), ((String)element.get("BASM_REGID")).getBytes()); 
     } 
     return obj; 
    }else{ 
     return null; 
    } 
    } 

以下是我们所得到的例外：由造成

2016-08-22T21:47:33.469Z: Error: (84707221e08b977b): java.lang.RuntimeException: com.google.cloud.dataflow.sdk.util.UserCodeExc ption: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn$1.output(SimpleParDoFn.java:162) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449) at com.nytimes.adtech.dataflow.pipelines.BigTableSegmentData$2.processElement(BigTableSegmentData.java:70) Caused by: com.google.cloud.dataflow.sdk.util.UserCodeException: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsExcept on: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.dataflow.sdk.util.UserCodeException.wrap(UserCodeException.java:35) at com.google.cloud.dataflow.sdk.util.UserCodeException.wrapIf(UserCodeException.java:40) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.wrapUserCodeException(DoFnRunnerBase.java:368) at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:51) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn.processElement(SimpleParDoFn.java:190) at com.google.cloud.dataflow.sdk.runners.worker.ForwardingParDoFn.processElement(ForwardingParDoFn.java:42) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerLoggingParDoFn.processElement(DataflowWorkerLoggingParDoFn. ava:47) at com.google.cloud.dataflow.sdk.util.common.worker.ParDoOperation.process(ParDoOperation.java:53) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:52) 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:287) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449) at com.nytimes.adtech.dataflow.pipelines.BigTableSegmentData$2.processElement(BigTableSegmentData.java:70) at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:49) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn.processElement(SimpleParDoFn.java:190) at com.google.cloud.dataflow.sdk.runners.worker.ForwardingParDoFn.processElement(ForwardingParDoFn.java:42) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerLoggingParDoFn.processElement(DataflowWorkerLoggingParDoFn. ava:47) at com.google.cloud.dataflow.sdk.util.common.worker.ParDoOperation.process(ParDoOperation.java:53) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:52) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:226) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.start(ReadOperation.java:167) at com.google.cloud.dataflow.sdk.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:71) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.executeWork(DataflowWorker.java:288) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.doWork(DataflowWorker.java:221) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.getAndPerformWork(DataflowWorker.java:173) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.doWork(DataflowWorkerHarness.java:193) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:173) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:160) 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)

：

org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.handleExceptions(BigtableBufferedMutator.java:389) at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.mutate(BigtableBufferedMutator.java:274) at com.google.cloud.bigtable.dataflow.CloudBigtableIO$CloudBigtableSingleTableBufferedWriteFn.processElement(CloudBigtabl IO.java:966)

异常数据流从控制台复制

(7e75740160102c05): java.lang.RuntimeException: com.google.cloud.dataflow.sdk.util.UserCodeException: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn$1.output(SimpleParDoFn.java:162) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnContext.outputWindowedValue(DoFnRunnerBase.java:287) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449) at com.nytimes.adtech.dataflow.pipelines.BigTableSegmentData$2.processElement(BigTableSegmentData.java:70) Caused by: com.google.cloud.dataflow.sdk.util.UserCodeException: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.dataflow.sdk.util.UserCodeException.wrap(UserCodeException.java:35) at com.google.cloud.dataflow.sdk.util.UserCodeException.wrapIf(UserCodeException.java:40) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.wrapUserCodeException(DoFnRunnerBase.java:368) at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:51) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn.processElement(SimpleParDoFn.java:190) 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:53) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:52) 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:287) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase$DoFnProcessContext.output(DoFnRunnerBase.java:449) at com.nytimes.adtech.dataflow.pipelines.BigTableSegmentData$2.processElement(BigTableSegmentData.java:70) at com.google.cloud.dataflow.sdk.util.SimpleDoFnRunner.invokeProcessElement(SimpleDoFnRunner.java:49) at com.google.cloud.dataflow.sdk.util.DoFnRunnerBase.processElement(DoFnRunnerBase.java:138) at com.google.cloud.dataflow.sdk.runners.worker.SimpleParDoFn.processElement(SimpleParDoFn.java:190) at com.google.cloud.dataflow.sdk.runners.worker.ForwardingParDoFn.processElement(ForwardingParDoFn.java:42) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerLoggingParDoFn.processElement(DataflowWorkerLoggingParDoFn.java:47) at com.google.cloud.dataflow.sdk.util.common.worker.ParDoOperation.process(ParDoOperation.java:53) at com.google.cloud.dataflow.sdk.util.common.worker.OutputReceiver.process(OutputReceiver.java:52) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:226) at com.google.cloud.dataflow.sdk.util.common.worker.ReadOperation.start(ReadOperation.java:167) at com.google.cloud.dataflow.sdk.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:71) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.executeWork(DataflowWorker.java:288) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.doWork(DataflowWorker.java:221) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorker.getAndPerformWork(DataflowWorker.java:173) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.doWork(DataflowWorkerHarness.java:193) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:173) at com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness$WorkerThread.call(DataflowWorkerHarness.java:160) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: StatusRuntimeException: 1 time, at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.handleExceptions(BigtableBufferedMutator.java:389) at com.google.cloud.bigtable.hbase.BigtableBufferedMutator.mutate(BigtableBufferedMutator.java:274) at com.google.cloud.bigtable.dataflow.CloudBigtableIO$CloudBigtableSingleTableBufferedWriteFn.processElement(CloudBigtableIO.java:966) 

2016年8月23日（13:17:54）java.lang.Runti meException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud。 dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException： org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop ... 。 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（ 13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java。 lang.RuntimeException：com.google.cloud.dataflow.sdk.util.User CodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop。 ... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08- 23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54） java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com。 google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk。 util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13 ：17：54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang .RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud .dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException ：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .. .. 2016-08-23（13:17:54）java.lang.Run timeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud。 dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException： org.apache。hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016- 08-23（13:17:54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17： 54）java.lang.RuntimeException：com.google.cloud.dataflow.sdk.util.UserCodeException：org.apache.hadoop .... 2016-08-23（13:17:54）java.lang.RuntimeException：

在此先感谢

Answer 1

我们脱机了。这里的问题是，与群集中的Cloud Bigtable节点数量相比，您拥有太多的Dataflow工作者。您需要通过reducing Dataflow workers或联系我们的团队来增加您的Cloud Bigtable资源来更改此比例。

Bigtable相对于您所拥有的Cloud Bigtable节点数量表现出色，但来自Dataflow的负载过高而无法可靠处理。

您可以在Google云端控制台的"CPU Usage"图表中查看您的使用情况。超过80％的容量可能会导致问题。如果获得更多Bigtable Quota，则可以在运行Dataflow作业之前增加节点的数量，并在作业完成后将其减少。例如，Scio does that。

==

关于“？还有发生了什么数据管道内是否有再加工或者是在运输途中丢失到BigTable的？”：

数据流尝试将数据再次发送至Bigtable的。在这些情况下，Dataflow的重试机制将纠正临时问题。

不幸的是，当问题变成Cloud Bigtable重载时，重试会通过向Bigtable发送更多流量来增加问题的复杂性。