[KAFKA-7044] kafka-consumer-groups.sh NullPointerException describing round robin or sticky assignors - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: 1.1.0
Fix Version/s: 1.1.2, 2.0.1, 2.1.0
Component/s: tools
Labels:
None
Environment:
CentOS 7.4, Oracle JDK 1.8

Description

We've recently moved to using the round robin assignor for one of our consumer groups, and started testing the sticky assignor. In both cases, using Kafka 1.1.0 we get a null pointer exception unless the group being described is rebalancing:

kafka-consumer-groups --bootstrap-server fqdn:9092 --describe --group groupname-for-consumer

Error: Executing consumer group command failed due to null
[2018-06-12 01:32:34,179] DEBUG Exception in consumer group command (kafka.admin.ConsumerGroupCommand$)
java.lang.NullPointerException
at scala.Predef$.Long2long(Predef.scala:363)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$getLogEndOffsets$2.apply(ConsumerGroupCommand.scala:612)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$getLogEndOffsets$2.apply(ConsumerGroupCommand.scala:610)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.immutable.List.foreach(List.scala:392)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.immutable.List.map(List.scala:296)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService.getLogEndOffsets(ConsumerGroupCommand.scala:610)
at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.describePartitions(ConsumerGroupCommand.scala:328)
at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.collectConsumerAssignment(ConsumerGroupCommand.scala:308)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService.collectConsumerAssignment(ConsumerGroupCommand.scala:544)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$10$$anonfun$13.apply(ConsumerGroupCommand.scala:571)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$10$$anonfun$13.apply(ConsumerGroupCommand.scala:565)
at scala.collection.immutable.List.flatMap(List.scala:338)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$10.apply(ConsumerGroupCommand.scala:565)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService$$anonfun$10.apply(ConsumerGroupCommand.scala:558)
at scala.Option.map(Option.scala:146)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService.collectGroupOffsets(ConsumerGroupCommand.scala:558)
at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.describeGroup(ConsumerGroupCommand.scala:271)
at kafka.admin.ConsumerGroupCommand$KafkaConsumerGroupService.describeGroup(ConsumerGroupCommand.scala:544)
at kafka.admin.ConsumerGroupCommand$.main(ConsumerGroupCommand.scala:77)
at kafka.admin.ConsumerGroupCommand.main(ConsumerGroupCommand.scala)
[2018-06-12 01:32:34,255] DEBUG Removed sensor with name connections-closed: (org.apache.kafka.common.metrics.Metrics)