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Posted to dev@kafka.apache.org by "Chia-Ping Tsai (Jira)" <ji...@apache.org> on 2025/08/25 19:55:00 UTC

[jira] [Created] (KAFKA-19645) add a lower bound to num.replica.fetchers

Chia-Ping Tsai created KAFKA-19645:
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             Summary: add a lower bound to num.replica.fetchers
                 Key: KAFKA-19645
                 URL: https://issues.apache.org/jira/browse/KAFKA-19645
             Project: Kafka
          Issue Type: Improvement
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai


`num.replica.fetchers` parameter does not enforce a lower bound, so both `num.replica.fetchers=0` or `num.replica.fetchers=-1` are valid when starting a broker. However, setting `num.replica.fetchers=-1` will result in only one fetcher being created, while setting `num.replica.fetchers=0` will cause a `java.lang.ArithmeticException: / by zero` during replication startup



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