[KAFKA-15350] MetadataLoaderMetrics has ClassNotFoundException in system tests

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Invalid
• Affects Version/s: 3.6.0
• Component/s: kraft, system tests
• Assignee: Unassigned
• Reporter: Greg Harris
• Created: 15/Aug/23 22:28
• Updated: 15/Aug/23 22:41
• Resolved: 15/Aug/23 22:41

Description

The system tests appear to be failing on trunk with:

[2023-08-15 22:11:34,235] ERROR Exiting Kafka due to fatal exception (kafka.Kafka$)
java.lang.NoClassDefFoundError: org/apache/kafka/image/loader/MetadataLoaderMetrics
   at kafka.server.KafkaRaftServer.<init>(KafkaRaftServer.scala:68)
   at kafka.Kafka$.buildServer(Kafka.scala:83)
   at kafka.Kafka$.main(Kafka.scala:91)
   at kafka.Kafka.main(Kafka.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.kafka.image.loader.MetadataLoaderMetrics
   at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
   ... 4 more

This happens with the `tests/kafkatest/tests/connect/`, `tests/kafkatest/tests/core/kraft_upgrade_test.py` and possibly others.

Issue Links

• relates to: KAFKA-15183 Add more controller, loader, snapshot emitter metrics