Chia-Ping Tsai created KAFKA-9786:
-------------------------------------
Summary: fix flaky
MetricsTest.testGeneralBrokerTopicMetricsAreGreedilyRegistered
Key: KAFKA-9786
URL: https://issues.apache.org/jira/browse/KAFKA-9786
Project: Kafka
Issue Type: Test
Reporter: Chia-Ping Tsai
Assignee: Chia-Ping Tsai
{code:java}
java.lang.AssertionError: expected:<18> but was:<23>
at org.junit.Assert.fail(Assert.java:89)
at org.junit.Assert.failNotEquals(Assert.java:835)
at org.junit.Assert.assertEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:633)
at
kafka.metrics.MetricsTest.testGeneralBrokerTopicMetricsAreGreedilyRegistered(MetricsTest.scala:108)
{code}
As gradle may use same JVM to run multiples test, the metrics from other tests
can break MetricsTest.testGeneralBrokerTopicMetricsAreGreedilyRegistered.
{code:scala}
private def topicMetrics(topic: Option[String]): Set[String] = {
val metricNames =
KafkaYammerMetrics.defaultRegistry.allMetrics().keySet.asScala.map(_.getMBeanName)
filterByTopicMetricRegex(metricNames, topic)
}
{code}
BTW, the orphan metrics is left by ReplicaManagerTest.
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