为什么AdminClient不抛出异常？

Question

I have a Kafka AdminClient, that when Kafkaserver is active, then it will return true otherwise false.

  private def health(server: String): Boolean = {
    val props = new Properties
    props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, server)
    props.put(AdminClientConfig.CONNECTIONS_MAX_IDLE_MS_CONFIG, "10000")
    props.put(AdminClientConfig.REQUEST_TIMEOUT_MS_CONFIG, "5000")

    try {
      AdminClient
        .create(props)
        .listTopics()
        .names()
        .get()
      true
    } catch {
      case _: InterruptedException => false
      case _: ExecutionException => false
    }

Now, I have a scenario that Kafka is offline und the method returns neither false or true .

What am I doing wrong?

Answer 1

Applying the comment, I cannot seem to replicate the issue, for example, the following

  val kafkaFuture = new KafkaFutureImpl
  kafkaFuture.completeExceptionally(new RuntimeException("splosh"))
  println(
    try {
      kafkaFuture.get()
    } catch {
      case _: InterruptedException => "boom"
      case _: ExecutionException => "crash"
    }
  )

outputs crash , which shows case _: ExecutionException branch was hit correctly.

Answer 2

import scala.util.Try

private def health(server: String): Boolean = {
  val props = new Properties
  props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, server)
  props.put(AdminClientConfig.CONNECTIONS_MAX_IDLE_MS_CONFIG, "10000")
  props.put(AdminClientConfig.REQUEST_TIMEOUT_MS_CONFIG, "5000")

  Try (
    AdminClient
      .create(props)
      .listTopics()
      .names()
      .get()
  ).isSuccess
}

The reason for that happen is that another exception is getting throwed.