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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