如何在Java客户端库中设置读取超时

我正在使用Spark加载一些数据到BigQuery。其思想是从S3读取数据，并使用Spark和BigQuery客户端API来加载数据。下面是对BigQuery执行插入操作的代码:

val bq = createAuthorizedClientWithDefaultCredentialsFromStream(appName, credentialStream)
val bqjob = bq.jobs().insert(pid, job, data).execute() // data is a InputStream content

使用这种方法，我看到了很多SocketTimeoutException。

Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:911)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:703)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1534)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
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.resumableUpload(MediaHttpUploader.java:419)
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)

看起来从S3读取的延迟导致Google http-client超时。我想增加超时时间，并尝试了以下选项:

val req = bq.jobs().insert(pid, job, data).buildHttpRequest()
req.setReadTimeout(3 * 60 * 1000)
val res = req.execute()

但是这会导致BigQuery中的Precondition失败。它期望mediaUploader为空，但不确定为什么。

Exception in thread "main" java.lang.IllegalArgumentException
    at com.google.api.client.repackaged.com.google.common.base.Preconditions.checkArgument(Preconditions.java:76)
    at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:37)
    at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.buildHttpRequest(AbstractGoogleClientRequest.java:297)

这导致我在BigQuery

上尝试第二个插入API

val req = bq.jobs().insert(pid, job).buildHttpRequest().setReadTimeout(3 * 60 * 1000).setContent(data)
val res = req.execute()

这次失败了，出现了不同的错误。

Exception in thread "main" com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 Bad Request
{
  "code" : 400,
  "errors" : [ {
    "domain" : "global",
    "message" : "Job configuration must contain exactly one job-specific configuration object (e.g., query, load, extract, spreadsheetExtract), but there were 0: ",
    "reason" : "invalid"
  } ],
  "message" : "Job configuration must contain exactly one job-specific configuration object (e.g., query, load, extract, spreadsheetExtract), but there were 0: "
}

请告诉我如何设置超时时间。如果我做错了什么，也指出我。

我将回答标题中的主要问题:如何使用Java客户端库设置超时。

要设置超时，您需要在客户端中配置一个自定义HttpRequestInitializer。例如:

Bigquery.Builder builder =
    new Bigquery.Builder(new UrlFetchTransport(), new JacksonFactory(), credential);
final HttpRequestInitializer existing = builder.getHttpRequestInitializer();
builder.setHttpRequestInitializer(new HttpRequestInitializer() {
    @Override
    public void initialize(HttpRequest request) throws IOException {
      existing.initialize(request);
      request
          .setReadTimeout(READ_TIMEOUT)
          .setConnectTimeout(CONNECTION_TIMEOUT);
      }
    });
Bigquery client = builder.build();

我不认为这将解决你所面临的所有问题。有一些想法可能会有帮助，但我不完全理解这个场景，所以这些可能会偏离轨道:

如果你使用媒体上传来发送你的请求数据:这些不能太大，否则你会有超时或网络连接失败的风险。
如果您正在运行一个令人尴尬的并行数据迁移，并且数据块相对较小，那么bigquery.tabledata.insertAll可能更适合这样的大型风扇场景。详见https://cloud.google.com/bigquery/streaming-data-into-bigquery

谢谢你的问题!

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