我想为卡夫卡0.8.2中的卡夫卡斯卡拉客户端的抽象编写一个简单的测试。它基本上只是写信给卡夫卡,然后我尝试将其读回来。但是,我遇到了间歇性失败的问题,所以我将测试代码烧录到下面的代码中。此测试有时(很少)通过,有时会失败。我在做什么?卡夫卡测试失败/间歇地成功
package mykafkatest
import java.net.ServerSocket
import java.nio.file.Files
import java.util.{UUID, Properties}
import kafka.consumer.{Whitelist, ConsumerConfig, Consumer}
import kafka.producer.{ProducerConfig, Producer, KeyedMessage}
import kafka.serializer.StringDecoder
import kafka.server.KafkaConfig
import kafka.server.KafkaServerStartable
import org.apache.curator.test.TestingServer
import scala.concurrent.{Await, Future}
import scala.concurrent.duration._
class KafkaSenderTest extends org.scalatest.FunSpecLike with org.scalatest.ShouldMatchers with org.scalatest.BeforeAndAfterAll {
import scala.concurrent.ExecutionContext.Implicits.global
val zkServer = new TestingServer()
val socket = new ServerSocket(0)
val port = socket.getLocalPort.toString
socket.close()
val tmpDir = Files.createTempDirectory("kafka-test-logs")
val serverProps = new Properties
serverProps.put("broker.id", port)
serverProps.put("log.dirs", tmpDir.toAbsolutePath.toString)
serverProps.put("host.name", "localhost")
serverProps.put("zookeeper.connect", zkServer.getConnectString)
serverProps.put("port", port)
val config = new KafkaConfig(serverProps)
val kafkaServer = new KafkaServerStartable(config)
override def beforeAll ={
kafkaServer.startup()
}
override def afterAll = {
kafkaServer.shutdown()
}
it("should put messages on a kafka queue") {
println("zkServer: " + zkServer.getConnectString)
println("broker port: " + port)
val consumerProps = new Properties()
consumerProps.put("group.id", UUID.randomUUID().toString)
consumerProps.put("zookeeper.connect", zkServer.getConnectString)
val consumerConnector = Consumer.create(new ConsumerConfig(consumerProps))
val topic = "some-topic"
val filterSpec = new Whitelist(topic)
val stream = consumerConnector.createMessageStreamsByFilter(filterSpec, 1, new StringDecoder, new StringDecoder).head
val producerProps = new Properties()
producerProps.put("metadata.broker.list","localhost:"+port)
val sender = new Producer[Array[Byte], Array[Byte]](new ProducerConfig(producerProps))
val keyedMessage = new KeyedMessage[Array[Byte], Array[Byte]](topic, "awesome message".getBytes("UTF-8"))
sender.send(keyedMessage)
val msg = Await.result(Future { stream.take(1) }, 5 seconds)
msg.headOption should not be(empty)
}
}
编辑: 我已经创建了以下build.sbt和上面的代码为测试类新项目。
name := "mykafkatest"
version := "1.0"
scalaVersion := "2.11.5"
libraryDependencies ++= Seq(
"org.apache.kafka" %% "kafka" % "0.8.2.0",
"org.scalatest" %% "scalatest" % "2.2.2" % "test",
"org.apache.curator" % "curator-test" % "2.7.0" % "test"
)
而且测试似乎更频繁地通过,但它仍不能间断......
有什么错误讯息? 1. val stream是否可以使用String而生产者使用Array [byte]? 2.如果将'Thread.sleep(5)'放在'sender.send'之后,会有帮助吗? –
@cppinitiator当出现错误时,它来自'Await.result(Future {stream.take(1)},5秒)'给出'TimeoutException'。所以有时候这个测试通过了(而且速度很快),但是通常它会失败......在发送之后添加Thread.sleep(5)并没有帮助。如果这是由于字符串/数组[字节]造成的错误,我认为测试不会通过。 –
看来你使用的是StringDecoder,但是发送者需要Array [Byte]。如何将'val sender'和'val keyedMessage'都改为[String,String]? –