Uploaded image for project: 'Kafka'
  1. Kafka
  2. KAFKA-6316

Kafka Rebalancing issues when I kill one consumer

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 0.11.0.0
    • Fix Version/s: None
    • Component/s: consumer

      Description

      There is a very weird flow happening in the following case

      I have 6 consumer processes running connected to a cluster of 3 brokers. 3 of the consumers (set A) are subscribed to a particular set of topics (topics C) and the other 3 consumers (set B) are subscribed to another set of topics (topics D). All the consumers belong to the same consumer group. All the topics have a replication factor of 3 and are divided into 24 partitions. Each consumer is automatically assigned to 8 partitions of the topic set it is supposed to consume. I have set the assignment pattern to round robin.

      If I kill a consumer from set A, topics C are repartitioned successfully in the remaining consumers from set A. Each consumer in set A is now subscribed to 12 partitions from topics C.

      But consumers in set B go crazy. All topics and all partitions in D are assigned to any one consumer from B and the rest of the consumers remain idle - All 24 partitions of all topics in set D are assigned to a single process.

      I need some idea on how to debug this and what could be the issue?

      I believe only the consumers in topic C should be affected. Consumer set B should remain unaffected and definitely not assign all partitions to a single process

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              krishan1390 Krishan Goyal
            • Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

              • Created:
                Updated: