kafka runtime_error ai_generated true

org.apache.kafka.common.errors.InvalidPartitionCountException: The partition count 0 is invalid for static group member

ID: kafka/invalid-partition-count-on-static-membership

Also available as: JSON · Markdown · 中文
82%Fix Rate
85%Confidence
1Evidence
2024-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Kafka 3.5.0 active — — —
Kafka 3.6.0 active — — —
Kafka 3.7.0 active — — —

Root Cause

Static consumer group membership requires at least one partition assignment; a count of zero indicates a misconfigured or uninitialized assignment strategy.

generic

中文

静态消费者组成员资格需要至少一个分区分配；计数为零表示分配策略配置错误或未初始化。

Official Documentation

https://kafka.apache.org/documentation/#consumerconfigs_group.instance.id

Workarounds

  1. 95% success Ensure the consumer subscribes to at least one topic with partitions before joining the group. Example: consumer.subscribe(Pattern.compile("my-topic-.*")); 
    Ensure the consumer subscribes to at least one topic with partitions before joining the group. Example: consumer.subscribe(Pattern.compile("my-topic-.*"));
  2. 88% success Set partition.assignment.strategy to a non-empty strategy like 'org.apache.kafka.clients.consumer.RangeAssignor' explicitly in consumer config. 
    Set partition.assignment.strategy to a non-empty strategy like 'org.apache.kafka.clients.consumer.RangeAssignor' explicitly in consumer config.

中文步骤

  1. Ensure the consumer subscribes to at least one topic with partitions before joining the group. Example: consumer.subscribe(Pattern.compile("my-topic-.*"));
  2. Set partition.assignment.strategy to a non-empty strategy like 'org.apache.kafka.clients.consumer.RangeAssignor' explicitly in consumer config.

Dead Ends

Common approaches that don't work:

  1. Tuning consumer max.poll.records to a higher value 90% fail

    Increasing max.poll.records does not affect partition assignment count and only delays rebalance timeouts.

  2. Deleting group.instance.id from consumer config 70% fail

    Removing group.instance.id disables static membership but loses group rebalance stability benefits.