[KAFKA-16930] UniformHeterogeneousAssignmentBuilder throws NPE when member has not subscriptions

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.7.0
• Fix Version/s: 3.8.0
• Assignee: David Jacot
• Reporter: David Jacot
• Created: 11/Jun/24 12:51
• Updated: 11/Jun/24 18:46
• Resolved: 11/Jun/24 18:46

Description

java.lang.NullPointerException: Cannot invoke "org.apache.kafka.coordinator.group.assignor.MemberAssignment.targetPartitions()" because the return value of "java.util.Map.get(Object)" is null
	at org.apache.kafka.coordinator.group.assignor.GeneralUniformAssignmentBuilder.canMemberParticipateInReassignment(GeneralUniformAssignmentBuilder.java:248)
	at org.apache.kafka.coordinator.group.assignor.GeneralUniformAssignmentBuilder.balance(GeneralUniformAssignmentBuilder.java:336)
	at org.apache.kafka.coordinator.group.assignor.GeneralUniformAssignmentBuilder.buildAssignment(GeneralUniformAssignmentBuilder.java:157)
	at org.apache.kafka.coordinator.group.assignor.UniformAssignor.assign(UniformAssignor.java:84)
	at org.apache.kafka.coordinator.group.consumer.TargetAssignmentBuilder.build(TargetAssignmentBuilder.java:302)
	at org.apache.kafka.coordinator.group.GroupMetadataManager.updateTargetAssignment(GroupMetadataManager.java:1913)
	at org.apache.kafka.coordinator.group.GroupMetadataManager.consumerGroupHeartbeat(GroupMetadataManager.java:1518)
	at org.apache.kafka.coordinator.group.GroupMetadataManager.consumerGroupHeartbeat(GroupMetadataManager.java:2254)
	at org.apache.kafka.coordinator.group.GroupCoordinatorShard.consumerGroupHeartbeat(GroupCoordinatorShard.java:308)
	at org.apache.kafka.coordinator.group.GroupCoordinatorService.lambda$consumerGroupHeartbeat$0(GroupCoordinatorService.java:298)
	at org.apache.kafka.coordinator.group.runtime.CoordinatorRuntime$CoordinatorWriteEvent.lambda$run$0(CoordinatorRuntime.java:769)
	at org.apache.kafka.coordinator.group.runtime.CoordinatorRuntime.withActiveContextOrThrow(CoordinatorRuntime.java:1582)
	at org.apache.kafka.coordinator.group.runtime.CoordinatorRuntime.access$1400(CoordinatorRuntime.java:96)
	at org.apache.kafka.coordinator.group.runtime.CoordinatorRuntime$CoordinatorWriteEvent.run(CoordinatorRuntime.java:767)
	at org.apache.kafka.coordinator.group.runtime.MultiThreadedEventProcessor$EventProcessorThread.handleEvents(MultiThreadedEventProcessor.java:144)
	at org.apache.kafka.coordinator.group.runtime.MultiThreadedEventProcessor$EventProcessorThread.run(MultiThreadedEventProcessor.java:176) 

Issue Links

• links to: GitHub Pull Request #16283