获取com.google.api.services.datastore.client.DatastoreException：从Dataflow访问Cloud Datastore时发生后端错误

我正在使用以下代码片段从Dataflow访问Cloud Datastore。数据存储是在我的项目中创建的，我能够运行仅访问云存储的Dataflow样本。获取com.google.api.services.datastore.client.DatastoreException：从Dataflow访问Cloud Datastore时发生后端错误

Pipeline p = Pipeline.create(options); 
    String datasetId = "myGoogleProjectId"; 
    p.apply(
      Read.from(DatastoreIO.source() 
        .withDataset(datasetId) 
        .withQuery(getQuery()))) 
       .apply(new ParseEntity()) 
       .apply(new ProcessEntity()) 
       .apply(TextIO.Write.named("WriteEntityAttributes").to(options.getOutput()));   
    p.run();

我使用下面的代码创建查询，

 Query.Builder q = Query.newBuilder(); 
     q.addKindBuilder().setName("MyKind"); 
     return q.build();

但我得到以下错误，同时运行使用DirectPiplelineRunner

Aug 17, 2016 1:02:15 AM com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner run 
INFO: Executing pipeline using the DirectPipelineRunner. 
Aug 17, 2016 1:06:26 AM com.google.cloud.dataflow.sdk.util.RetryHttpRequestInitializer$LoggingHttpBackoffUnsuccessfulResponseHandler handleResponse 
WARNING: Request failed with code 503, will NOT retry: https://www.googleapis.com/datastore/v1beta2/datasets/myGoogleProjectId/runQuery 
Exception in thread "main" java.lang.RuntimeException: java.io.IOException: com.google.api.services.datastore.client.DatastoreException: Backend Error 
    at com.google.cloud.dataflow.sdk.io.Read$Bounded$1.evaluateReadHelper(Read.java:189) 
    at com.google.cloud.dataflow.sdk.io.Read$Bounded$1.evaluate(Read.java:168) 
    at com.google.cloud.dataflow.sdk.io.Read$Bounded$1.evaluate(Read.java:164) 
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.visitTransform(DirectPipelineRunner.java:858) 
    at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:219) 
    at com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215) 
    at com.google.cloud.dataflow.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:102) 
    at com.google.cloud.dataflow.sdk.Pipeline.traverseTopologically(Pipeline.java:259) 
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.run(DirectPipelineRunner.java:814) 
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:526) 
    at com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:96) 
    at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:180) 
    at com.google.cloud.dataflow.examples.WordCount.main(WordCount.java:291) 
Caused by: java.io.IOException: com.google.api.services.datastore.client.DatastoreException: Backend Error 
    at com.google.cloud.dataflow.sdk.io.DatastoreIO$DatastoreReader.advance(DatastoreIO.java:920) 
    at com.google.cloud.dataflow.sdk.io.DatastoreIO$DatastoreReader.start(DatastoreIO.java:911) 
    at com.google.cloud.dataflow.sdk.io.Read$Bounded$1.evaluateReadHelper(Read.java:178) 
    ... 12 more 
Caused by: com.google.api.services.datastore.client.DatastoreException: Backend Error 
    at com.google.api.services.datastore.client.RemoteRpc.makeException(RemoteRpc.java:115) 
    at com.google.api.services.datastore.client.RemoteRpc.call(RemoteRpc.java:81) 
    at com.google.api.services.datastore.client.BaseDatastoreFactory$RemoteRpc.call(BaseDatastoreFactory.java:41) 
    at com.google.api.services.datastore.client.Datastore.runQuery(Datastore.java:109) 
    at com.google.cloud.dataflow.sdk.io.DatastoreIO$DatastoreReader.getIteratorAndMoveCursor(DatastoreIO.java:969) 
    at com.google.cloud.dataflow.sdk.io.DatastoreIO$DatastoreReader.advance(DatastoreIO.java:918) 
    ... 14 more 
Caused by: com.google.api.client.http.HttpResponseException: 503 Service Unavailable 
Backend Error 
    at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1070) 
    at com.google.api.services.datastore.client.RemoteRpc.call(RemoteRpc.java:78) 
    ... 18 more

非常感谢您的帮助，数据流！

来源

2016-08-17 raserside

你可以发送你的项目ID到eddavisson @？ –

发送！谢谢v多 – raserside

要使用此版本的Dataflow，您需要在云控制台中启用“Google Cloud Datastore API（v1beta2）”API。

来源

2016-08-17 16:51:46

太棒了！那工作。非常感谢您的帮助！ – raserside

获取com.google.api.services.datastore.client.DatastoreException：从Dataflow访问Cloud Datastore时发生后端错误

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