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Posted to dev@kafka.apache.org by "Alyssa Huang (Jira)" <ji...@apache.org> on 2025/09/25 18:01:00 UTC

[jira] [Created] (KAFKA-19736) KAFKA-15665 prevents safe reassignments from completing

Alyssa Huang created KAFKA-19736:
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             Summary: KAFKA-15665 prevents safe reassignments from completing
                 Key: KAFKA-19736
                 URL: https://issues.apache.org/jira/browse/KAFKA-19736
             Project: Kafka
          Issue Type: Bug
            Reporter: Alyssa Huang


The implementation for KAFKA-15665 is a little too strict - it requires that all replicas in the target replica set be in ISR.

This means if we have a reassignment like [1, 2, 3] -> [2, 3, 4] where broker 2 was unhealthy and lagging in replication, reassignment would not complete. 



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