param message.send.max.retries does not work in kafka producer - scala

Question

I have project on scala and sbt
I have producer
I tried to retry messages if kafka unreachable
package com.example
import akka.actor.ActorSystem
import akka.kafka.ProducerSettings
import akka.kafka.scaladsl.Producer
import akka.stream.scaladsl.Source
import akka.stream.{ActorMaterializer, ActorMaterializerSettings, Supervision}
import org.apache.kafka.clients.producer.{ProducerConfig, ProducerRecord}
import org.apache.kafka.common.serialization.StringSerializer
import scala.concurrent.Await
import scala.concurrent.duration._
import scala.util.control.NonFatal
object producer extends App {
private val decider: Supervision.Decider = {
case NonFatal(ex) =>
println("Non fatal exception in flow. Skip message and resuming flow.",
ex)
Supervision.Restart
case ex: Throwable =>
println("Other exception in flow. Stopping flow.", ex)
Supervision.Stop
}
implicit val system = ActorSystem("QuickStart")
private val strategy =
ActorMaterializerSettings(system).withSupervisionStrategy(decider)
implicit val materializer = ActorMaterializer(strategy)
val config = system.settings.config.getConfig("akka.kafka.producer")
val producerSettings =
ProducerSettings(system, new StringSerializer, new StringSerializer)
.withBootstrapServers("10.20.10.193:9092")
.withProperty("message.send.max.retries", "3")
.withProperty(ProducerConfig.MAX_BLOCK_MS_CONFIG, "5000")
//.withProperty(ProducerConfig.RECONNECT_BACKOFF_MS_CONFIG, "5000")
val done =
Source
.single("11")
.map(value => new ProducerRecord[String, String]("example", value))
.runWith(Producer.plainSink(producerSettings))
Await.result(done, 1000 seconds)
}
I defined a property:
.withProperty("message.send.max.retries", "3")
but it does not work
when I run produser with a bad kafka host - an output is
[INFO ] - 2018-07-30 23:00:36,951 - suppression - akka.event.slf4j.Slf4jLogger - Slf4jLogger started
(Non fatal exception in flow. Skip message and resuming flow.,org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 5000 ms.)
(Non fatal exception in flow. Skip message and resuming flow.,org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 5000 ms.)
Only two retries in log instead of three