David Arthur created KAFKA-17580:
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Summary: Java 21 spurious compilation failure
Key: KAFKA-17580
URL: https://issues.apache.org/jira/browse/KAFKA-17580
Project: Kafka
Issue Type: Bug
Components: build, streams
Reporter: David Arthur
Attachments: logs_28557874014.zip
On a trunk build with Java 21, we saw a very strange looking compilation error
during the streams:compileTestJava task.
{code:java}
2024-09-18T18:55:00.3977026Z Successfully started process 'command
'/usr/lib/jvm/temurin-21-jdk-amd64/bin/java''
2024-09-18T18:55:07.4782946Z
/home/runner/work/kafka/kafka/streams/src/test/java/org/apache/kafka/streams/integration/HighAvailabilityTaskAssignorIntegrationTest.java:319:
error: incompatible types: inference variable K#1 has incompatible bounds
2024-09-18T18:55:07.4786040Z return mkObjectProperties(
2024-09-18T18:55:07.4786613Z ^
2024-09-18T18:55:07.4787738Z equality constraints:
String,V#2,V#2,V#2,V#2,V#2,V#2,V#2,V#2,V#1,V#2,V#2,V#2,V#2,V#2,V#2,V#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2,K#2
2024-09-18T18:55:07.4789261Z lower bounds:
AssignmentListener,Long,Integer,String
2024-09-18T18:55:07.4790348Z where K#1,V#1,V#2,K#2 are type-variables:
2024-09-18T18:55:07.4791245Z K#1 extends Object declared in method
<K#1,V#1>mkMap(Entry<K#1,V#1>...)
2024-09-18T18:55:07.4792376Z V#1 extends Object declared in method
<K#1,V#1>mkMap(Entry<K#1,V#1>...)
2024-09-18T18:55:07.4793418Z V#2 extends Object declared in method
<K#2,V#2>mkEntry(K#2,V#2)
2024-09-18T18:55:07.4794430Z K#2 extends Object declared in method
<K#2,V#2>mkEntry(K#2,V#2)
2024-09-18T18:55:07.4795064Z
2024-09-18T18:55:07.4795309Z > Task :connect:runtime:compileTestJava {code}
CI Job:
[https://github.com/apache/kafka/actions/runs/10928260916/job/30336275918]
Logs are attached.
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