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https://issues.apache.org/jira/browse/KAFKA-8483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson updated KAFKA-8483:
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Description: The idempotent producer attempts to detect spurious
UNKNOWN_PRODUCER_ID errors and handle them by reassigning sequence numbers to
the inflight batches. The inflight batches are tracked in a PriorityQueue. The
problem is that the reassignment of sequence numbers depends on the iteration
order of PriorityQueue, which does not guarantee any ordering. So this can
result in sequence numbers being assigned in the wrong order. (was: The
producer attempts to detect spurious UNKNOWN_PRODUCER_ID errors and handle them
by reassigning sequence numbers to the inflight batches. The inflight batches
are tracked in a PriorityQueue. The problem is that the reassignment of
sequence numbers depends on the iteration order of PriorityQueue, which does
not guarantee any ordering. So this can result in sequence numbers being
assigned in the wrong order.)
> Possible reordering of messages by producer after UNKNOWN_PRODUCER_ID error
> ---------------------------------------------------------------------------
>
> Key: KAFKA-8483
> URL: https://issues.apache.org/jira/browse/KAFKA-8483
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Priority: Major
>
> The idempotent producer attempts to detect spurious UNKNOWN_PRODUCER_ID
> errors and handle them by reassigning sequence numbers to the inflight
> batches. The inflight batches are tracked in a PriorityQueue. The problem is
> that the reassignment of sequence numbers depends on the iteration order of
> PriorityQueue, which does not guarantee any ordering. So this can result in
> sequence numbers being assigned in the wrong order.
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