Chris M. Hostetter created KAFKA-17770: ------------------------------------------
Summary: system default Locale sensitivity in scala code uppercasing enums Key: KAFKA-17770 URL: https://issues.apache.org/jira/browse/KAFKA-17770 Project: Kafka Issue Type: Bug Reporter: Chris M. Hostetter Code that invokes {{kafka.server.KafkaConfig}} can encounter "No enum constant" for values that (IIUC) come from implicit defaults – {_}When the system default Locale has uppercase rules that differ from English{_}! This may not affect most kafka server deployments, but it can easily come up when using embedded kafka for testing purposes – especially in downstream projects that [explicitly randomize their locales |http://labs.carrotsearch.com/randomizedtesting.html]to check for behavior like this. Below is an example stack trace from a test that uses {{org.apache.kafka.streams.integration.utils.EmbeddedKafkaCluster}} (with no custom configuration) when using the "az" locale (Similar errors can happen with the "tr-TR" locale, etc...) Note that the "I" in {{GroupType.CLASSİC}} is actually {{U+0130}} (not {{{}U+0049{}}}) {noformat} > java.lang.IllegalArgumentException: No enum constant org.apache.kafka.coordinator.group.Group.GroupType.CLASSİC > at java.base/java.lang.Enum.valueOf(Enum.java:273) > at org.apache.kafka.coordinator.group.Group$GroupType.valueOf(Group.java:29) > at kafka.server.KafkaConfig.$anonfun$groupCoordinatorRebalanceProtocols$2(KafkaConfig.scala:2020) > at scala.collection.StrictOptimizedIterableOps.map(StrictOptimizedIterableOps.scala:100) > at scala.collection.StrictOptimizedIterableOps.map$(StrictOptimizedIterableOps.scala:87) > at scala.collection.mutable.ArrayBuffer.map(ArrayBuffer.scala:43) > at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:2020) > at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:1639) > at org.apache.kafka.streams.integration.utils.KafkaEmbedded.<init>(KafkaEmbedded.java:72) > at org.apache.kafka.streams.integration.utils.EmbeddedKafkaCluster.start(EmbeddedKafkaCluster.java:131) {noformat} -- This message was sent by Atlassian Jira (v8.20.10#820010)