Question

如何从被隔离的系统中检测隔离状态〜？

我在下面看到这个日志：

[warn] Remoting - Tried to associate with unreachable remote address [akka.tcp://Application@192.168.0.15:6000]. Address is now gated for 5000 ms, all messages to this address will be delivered to dead letters. Reason: The remote system has quarantined this system. No further associations to the remote system are possible until this system is restarted.

但我不确定如何通过代码对此作出反应。

我找到了这个帖子：Recovering from the Quarantined state，建议侦听QuarantinedEvent，但不会在系统被隔离上调度。

我实际上听了所有RemotingLifecycleEvent并发现了这个：

AssociationError [akka.tcp://Application@192.168.0.100:2552] -> [akka.tcp://Application@192.168.0.15:6000]: Error [Invalid address: akka.tcp://Application@192.168.0.15:6000] [akka.remote.InvalidAssociation: Invalid address: akka.tcp://Application@192.168.0.15:6000 Caused by: akka.remote.transport.Transport$InvalidAssociationException: The remote system has quarantined this system. No further associations to the remote system are possible until this system is restarted.]

但这只是一个AssociationError，由于其他许多原因也会被调度，我是否必须在错误中搜索实际文本"The remote system has quarantined this system."以确定？

Answer 1

是的，您的建议有效，可以按照以下方式完成

订阅演员akka.remote.AssociationErrorEvent

override def preStart(): Unit = {
  context.system.eventStream.subscribe(self, classOf[akka.remote.AssociationErrorEvent])
}

然后在receive方法

中执行以下操作

override def receive: Receive = {
  case e:AssociationErrorEvent =>
    log.info(s"AssociationErrorEvent: $e")
    if (e.cause.getCause.getMessage.contains("quarantined this system")) {
      log.warning(s"We got quarantined")
    }
}

Answer 2

在William Carter评论之后：

Akka提供了不需要检查邮件内容的适当事件。

class MyActor extends Actor with ActorLogging {

  override def preStart(): Unit = {
    super.preStart()
    context.system.eventStream.subscribe(context.self, classOf[ThisActorSystemQuarantinedEvent])
  }

  override def receive: Receive = {
    case ev: ThisActorSystemQuarantinedEvent => log.warning(s"I was quarantined by ${ev.remoteAddress}")
  }
}

Akka集群检测隔离状态

2 个答案: