数据流如何与BIgQuery数据集一起使用

时间：2018-06-29 12:32:35

标签： java google-bigquery google-cloud-dataflow apache-beam

我没有找到如何从指定的数据集中获取表格。我想使用Dataflow将表从Dataset US迁移到数据集位置EU。我想在数据集US的并行处理中获取所有表，并将表写入数据集EU。

Beam 2.4正在使用com.google.api.services.bigquery v2-rev374-1.22.0。这也是应与Beam 2.4一起使用的库。

使用DirectRunner成功运行代码，但如果使用DataflowRunner运行，则不会运行并引发错误

un 29, 2018 1:52:48 PM com.google.api.client.http.HttpRequest execute
ADVERTENCIA: exception thrown while executing request
java.net.SocketException: Unexpected end of file from server
        at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:851)
        at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1587)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:347)
        at com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:37)
        at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:94)
        at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequestWithoutGZip(MediaHttpUploader.java:545)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequest(MediaHttpUploader.java:562)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeUploadInitiation(MediaHttpUploader.java:519)
        at com.google.api.client.googleapis.media.MediaHttpUploader.resumableUpload(MediaHttpUploader.java:384)
        at com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:336)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:427)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
        at com.google.cloud.hadoop.util.AbstractGoogleAsyncWriteChannel$UploadOperation.call(AbstractGoogleAsyncWriteChannel.java:357)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

jun 29, 2018 1:52:55 PM com.google.api.client.http.HttpRequest execute
ADVERTENCIA: exception thrown while executing request
java.net.SocketException: Unexpected end of file from server
        at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:851)
        at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1587)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:347)
        at com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:37)
        at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:94)
        at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequestWithoutGZip(MediaHttpUploader.java:545)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequest(MediaHttpUploader.java:562)
        at com.google.api.client.googleapis.media.MediaHttpUploader.executeUploadInitiation(MediaHttpUploader.java:519)
        at com.google.api.client.googleapis.media.MediaHttpUploader.resumableUpload(MediaHttpUploader.java:384)
        at com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:336)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:427)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
        at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
        at com.google.cloud.hadoop.util.AbstractGoogleAsyncWriteChannel$UploadOperation.call(AbstractGoogleAsyncWriteChannel.java:357)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  

代码示例

package emp.customerjourney.etls;

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.bigquery.Bigquery;
import com.google.api.services.bigquery.Bigquery.*;
import com.google.api.services.bigquery.BigqueryScopes;
import com.google.api.services.bigquery.model.*;


import org.apache.beam.runners.dataflow.options.DataflowPipelineOptions;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryHelpers;
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO;


import org.apache.beam.sdk.options.Default;
import org.apache.beam.sdk.options.Description;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.Validation;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class Migracion {

    public static interface MyOptions extends DataflowPipelineOptions {
        @Description("BigQuery table to write to, specified as "+ "<project_id>:<dataset_id>.<table_id>. The dataset must already exist.")
        @Default.String("customerjourney:prueba.weather_stations")
        @Validation.Required
        String getOutput();
        void setOutput(String s);

        @Description("Table to read from, specified as "+ "<project_id>:<dataset_id>.<table_id>")
        @Default.String("customerjourney:118678548.gsod3")
        String getInput();
        void setInput(String value);


    }


    public static Bigquery createAuthorizedClient() throws IOException {
        // Create the credential
        HttpTransport transport = new NetHttpTransport();
        JsonFactory jsonFactory = new JacksonFactory();
        GoogleCredential credential = GoogleCredential.getApplicationDefault(transport, jsonFactory);

        if (credential.createScopedRequired()) {
            credential = credential.createScoped(BigqueryScopes.all());
        }

        return new Bigquery.Builder(transport, jsonFactory, credential)
                .setApplicationName("Bigquery Samples")
                .build();
    }


    public static final void main(String args[]) throws Exception {


        String projectId = "customerjourney";
        String datasetName = "dsorigen";
        // Create a new Bigquery client authorized via Application Default Credentials.
        Bigquery bigquery = createAuthorizedClient();
        Bigquery.Tables.List lista=bigquery.tables().list(projectId,datasetName);
        TableList rp= lista.execute();
        List<TableList.Tables> tblista =rp.getTables();
        String  entrada=tblista.get(3).getId();

        MyOptions options = PipelineOptionsFactory.fromArgs(args).withValidation().as(MyOptions.class);

        options.setTempLocation("gs://pruebasg/teststaging");
        options.setRegion("europe-west1");
        options.setStagingLocation("gs://pruebasg/temp_dataflow_tasks");
        Pipeline p = Pipeline.create(options);

        // Build the table schema for the output table.
        List<TableFieldSchema> fields = new ArrayList<>();
        fields.add(new TableFieldSchema().setName("month").setType("INTEGER"));
        fields.add(new TableFieldSchema().setName("tornado_count").setType("INTEGER"));
        TableSchema schema = new TableSchema().setFields(fields);

       // p.apply(BigQueryIO.readTableRows().from(options.getInput()))
        p.apply(BigQueryIO.readTableRows().from(entrada)) //get dataset name form api Bigquery V2
                .apply(new BigQueryTornadoes.CountTornadoes())
                .apply(BigQueryIO.writeTableRows()
                        .to(options.getOutput())
                        .withSchema(schema)
                        .withCreateDisposition(BigQueryIO.Write.CreateDisposition.CREATE_IF_NEEDED)
                        .withWriteDisposition(BigQueryIO.Write.WriteDisposition.WRITE_TRUNCATE));



        p.run().waitUntilFinish();

        options.getExecutorService().shutdown();
        try {
            options.getExecutorService().awaitTermination(3, TimeUnit.MINUTES);
        } catch (InterruptedException e) {
            System.out.println("Thread was interrupted waiting for execution service to shutdown.");
        }
        System.out.println("termino");

    }

}

<dependencies>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-sdks-java-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-runners-direct-java</artifactId>
        </dependency>

        <dependency>
            <groupId>com.google.cloud.dataflow</groupId>
            <artifactId>google-cloud-dataflow-java-sdk-all</artifactId>
            <version>[2.4.0, 2.99)</version>
        </dependency>

        <!-- slf4j API frontend binding with JUL backend -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.14</version>
        </dependency>

       <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-jdk14</artifactId>
            <version>1.7.14</version>
        </dependency>

     <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-bigquery</artifactId>
            <version>${bigquery.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.guava</groupId>
                    <artifactId>guava-jdk5</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>22.0</version>
        </dependency>

              <dependency>
                  <groupId>com.google.oauth-client</groupId>
                  <artifactId>google-oauth-client</artifactId>
                  <version>1.21.0</version>
              </dependency>
              <dependency>
                  <groupId>com.google.http-client</groupId>
                  <artifactId>google-http-client-jackson2</artifactId>
                  <version>1.21.0</version>
              </dependency>
              <dependency>
                  <groupId>com.google.oauth-client</groupId>
                  <artifactId>google-oauth-client-jetty</artifactId>
                  <version>1.21.0</version>
              </dependency>
              <dependency>
                  <groupId>com.google.code.gson</groupId>
                  <artifactId>gson</artifactId>
                  <version>2.7</version>
              </dependency>
              <dependency>
                  <groupId>junit</groupId>
                  <artifactId>junit</artifactId>
                  <version>4.12</version>
                  <scope>test</scope>
              </dependency>
              <dependency>
                  <groupId>com.google.truth</groupId>
                  <artifactId>truth</artifactId>
                  <version>0.29</version>
                  <scope>test</scope>
              </dependency>


          </dependencies>

数据流需要GOOGLE_APPLICATION_CREDENTIALS json文件来执行此代码吗？

  

我没有找到存在的数据集的方法列表   BigQuery IO。 Reference post

我能帮我吗？ –

2 个答案:

答案 0 :(得分：0)

我发布了有关Unexpected end of file from server的评论，不确定该怎么做。但是，对于您的GOOGLE_APPLICATION_CREDENTIALS问题，您将需要一个帐户来验证数据流。我正在使用通过gcloud auth login进行身份验证的帐户，但是您也可以将服务帐户与gcloud auth activate-service-account --key-file=path/to/keyfile.json一起使用。您可以通过IAM创建服务帐户。详细信息here。

答案 1 :(得分：0)

这是连接错误。我建议首先确认您是否按照其他答案中的说明正确设置了凭据，并且在仍然出现此错误时，请执行以下操作：

首先，此错误表明在服务器能够发送响应之前，TCP套接字已经关闭。一些可能的原因是：

  • 网络连接丢失
  • 服务器决定关闭连接
  • 客户端和服务器之间的某些操作终止了请求

考虑使用netstat / traceroute / ping之类的工具来查看是否可以在案例1和案例3的路由中找到问题。

如果服务器是关闭连接的服务器，则您的请求可能不正确或正在限制您以避免拥塞。在这种情况下，快速重试无济于事（在某些情况下，如果服务器同时出现问题，则重试会有所帮助）。您可以尝试指数退避和重试策略，如果该策略不起作用，则您的请求可能不是正确的请求。

相关问题
最新问题