Akka Http:超过配置的 max-open-requests 值 [32]

Akka Http: Exceeded configured max-open-requests value of [32]

我post一些数据到服务器使用下面的代码

  def post(endpoint: String, entity: Strict) = {
    Http().singleRequest(HttpRequest(uri = Notifier.notificationUrl + endpoint, method = HttpMethods.POST,
      entity = entity)) onComplete {
      case Success(response) => response match {
        case HttpResponse(StatusCodes.OK, _, _, _) =>
          log.info("communicated successfully with Server")
      }
      case Failure(response) =>
        log.error("communicated failed with Server: {}", response)
    }
  }

10 secondsNotifier 演员收到如下消息时调用此方法

case ecMonitorInformation: ECMonitorInformation =>
  post("monitor", httpEntityFromJson(ecMonitorInformation.toJson))

有问题吗?

我看到最初(大约 5 请求发送到服务器)但后来它挂了,我没有看到任何日志记录,服务器没有收到任何数据。在客户端一段时间后,我看到以下

ERROR c.s.e.notification.Notifier - communicated failed with Server: java.lang.RuntimeException: Exceeded configured max-open-requests value of [32]

这是怎么回事?我该如何解决这个问题?

如果您要重复调用您的方法,您可能需要考虑使用此处所述的基于连接池的客户端方法之一: http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/http/client-side/index.html

你也可以在akka-http客户端配置中设置连接池设置: http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/http/configuration.html#akka-http-core

搜索主机连接池。

我浏览了 docs 并尝试了以下

val connectionFlow: Flow[HttpRequest, HttpResponse, 
        Future[Http.OutgoingConnection]] =
        Http().outgoingConnection(host = "localhost", port = 8080)

然后

  def httpPost(uri: String, httpEntity:Strict) {
    val responseFuture: Future[HttpResponse] =
      Source.single(HttpRequest(uri = "/monitor", method = HttpMethods.POST, entity=httpEntity))
        .via(connectionFlow)
        .runWith(Sink.head)

    responseFuture onComplete {
      case Success(response) => log.info("Communicated with Server: {}", response)
      case Failure(failure) => log.error("Communication failed with Server: {}", failure)
    }

这对我有用

您可以使用 Source.queue 而不是 Source.single 来提供缓冲和溢出策略。在

查看更多详细信息

您也可以通过提高 akka 的 max-open-requests 属性 默认情况下 32 来克服此错误。

要更改的 属性 将是:

akka.http.host-connection-pool.max-open-requests = 64

唯一需要注意的是,当客户端打开的并发连接数多于该参数的新值时,这将失败,在此示例中,如果打开的连接数超过 64,您将得到相同的错误.