java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;

Question

I recently changed my application's Kafka client version. And immediately after that my integration tests start failing due to the below mentioned issue with embedded Kafka. This is the snippet from my code which is initialising embedded Kafka broker.

@ClassRule
public static EmbeddedKafkaRule kafkaEmbedded = new EmbeddedKafkaRule(1, true, 1, KafkaTopic.getTopics());

Here, KafkaTopic.getTopics() returns a list of topics. I am currently using spring-kafka-test 2.2.8.RELEASE and spring-kafka 1.3.8.RELEASE.

java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;

    at kafka.cluster.EndPoint$.<init>(EndPoint.scala:32)
    at kafka.cluster.EndPoint$.<clinit>(EndPoint.scala)
    at kafka.server.Defaults$.<init>(KafkaConfig.scala:68)
    at kafka.server.Defaults$.<clinit>(KafkaConfig.scala)
    at kafka.server.KafkaConfig$.<init>(KafkaConfig.scala:781)
    at kafka.server.KafkaConfig$.<clinit>(KafkaConfig.scala)
    at kafka.utils.TestUtils$.createBrokerConfig(TestUtils.scala:234)
    at kafka.utils.TestUtils.createBrokerConfig(TestUtils.scala)
    at org.springframework.kafka.test.EmbeddedKafkaBroker.createBrokerProperties(EmbeddedKafkaBroker.java:239)
    at org.springframework.kafka.test.EmbeddedKafkaBroker.afterPropertiesSet(EmbeddedKafkaBroker.java:214)
    at org.springframework.kafka.test.rule.EmbeddedKafkaRule.before(EmbeddedKafkaRule.java:109)
    at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:46)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

Can someone suggest a fix for this?

I tried adding testCompile 'org.scala-lang:scala-library:2.11.8' in my build.gradle but didn't helped. Can you suggest which version to use. — Khandelwal-manik
– Khandelwal-manik, Commented May 13, 2020 at 10:00
I have faced similar issued when I switched scala version. Reaplaced all my dependencies with compatible new scala version and it worked — QuickSilver
– QuickSilver, Commented May 13, 2020 at 10:01
You can't mix versions like that spring-kafka-test 2.2.8.RELEASE and spring-kafka 1.3.8.RELEASE. - they must be the same. Also see my answer. — Gary Russell
– Gary Russell, Commented May 13, 2020 at 13:58

Gary Russell · Accepted Answer · 2020-05-13 13:56:45Z

1

spring-kafka-test 2.2.8.RELEASE and spring-kafka 1.3.8.RELEASE.

You can't do that; the versions must match.

Also, when overriding the kafka-clients version, you must also override the other kafka jars used by the test embedded broker.

See the appendix for whichever version you are using; for example:

https://docs.spring.io/spring-kafka/docs/2.4.6.RELEASE/reference/html/#deps-for-24x

answered May 13, 2020 at 13:56

Gary Russell

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