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  1. Kafka
  2. KAFKA-6421

consumer group can't show when use kafka-consumer-groups tool if the leader of __consumer_offsets partition for this group changed

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 0.10.2.0, 0.11.0.1, 1.0.0
    • Fix Version/s: None
    • Component/s: offset manager, tools
    • Labels:
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      Description

      follow steps will reproduce this problem:
      1)there is a 3 brokers kafka cluster,use kafka-console-consumer.sh to consumer one topic and suppose group named "test-consumer-group",after a while, we stop consumer this topic.
      2)suppose test-consumer-group will be write offset meta to partition 3 of __consumer_offsets,and the leader of partition 3 is broker 1.
      3) and we scale the cluster to 5 nodes ,and reassign partititons,and leader of partition 3 is change to 0
      4)then we use kafka-consumer-groups.sh --list can't show test-consumer-group,but the offset meta still in topic __consumer_offsets
      and i found that:
      protocolType will be change to empty for test-consumer-group after leader changed.
      at last.

      listAllGroupsFlattened.filter(_.protocolType == ConsumerProtocol.PROTOCOL_TYPE)
      

      filter this test-consumer-group,so we can't use kafka-consumer-groups.sh to list it

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              • Assignee:
                vahid Vahid Hashemian
                Reporter:
                yuemeng yuemeng
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                • Created:
                  Updated:
                  Resolved: