LiamClarkeNZ commented on a change in pull request #11920:
URL: https://github.com/apache/kafka/pull/11920#discussion_r833080985
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File path: core/src/main/scala/kafka/server/DynamicBrokerConfig.scala
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@@ -201,7 +202,9 @@ class DynamicBrokerConfig(private val kafkaConfig:
KafkaConfig) extends Logging
private[server] val staticDefaultConfigs =
ConfigDef.convertToStringMapWithPasswordValues(KafkaConfig.defaultValues.asJava).asScala
private val dynamicBrokerConfigs = mutable.Map[String, String]()
private val dynamicDefaultConfigs = mutable.Map[String, String]()
- private val reconfigurables = mutable.Buffer[Reconfigurable]()
+
+ // Use COWArrayList to prevent concurrent modification exception when
reconfigurable added while iteration over list occurring
+ private val reconfigurables = new CopyOnWriteArrayList[Reconfigurable]()
private val brokerReconfigurables = mutable.Buffer[BrokerReconfigurable]()
Review comment:
That's a good question. I am happy to do so, I don't have much
experience in this area of code, I just wanted to help eliminate some flaky
tests. I can't see any downsides to doing so.
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