Neha Narkhede created KAFKA-1170:
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Summary: ISR can be inconsistent during partition reassignment for
low throughput partitions
Key: KAFKA-1170
URL: https://issues.apache.org/jira/browse/KAFKA-1170
Project: Kafka
Issue Type: Bug
Components: controller
Affects Versions: 0.8.1
Reporter: Neha Narkhede
Assignee: Neha Narkhede
Priority: Critical
During reassignment of partitions, if the reassigned replicas already has the
current leader, then the ISR of the partition can have the old replicas. This
is particularly true for partitions that don't have further incoming data,
since the leader does not remove replicas that have stopped sending fetch
requests from the ISR if their log end offsets match (no more data comes in).
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