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https://issues.apache.org/jira/browse/KAFKA-8710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16893035#comment-16893035
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ASF GitHub Bot commented on KAFKA-8710:
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bob-barrett commented on pull request #7115: KAFKA-8710: Update InitProducerId
to allow transactional producers to…
URL: https://github.com/apache/kafka/pull/7115
… bump epoch and continue running after errors
This patch implements the broker-side changes for KIP-360. It adds two new
fields to InitProducerId, lastEpoch and producerId. Passing these values allows
the TransactionCoordinator to safely bump a producer's epoch after some
failures (such as UNKNOWN_PRODUCER_ID and INVALID_PRODUCER_ID_MAPPING). When a
producer calls InitProducerId after a failure, the coordinator first checks the
producer ID from the request to make sure no other producer has been started
using the same transactional ID. If it is safe to continue, the coordinator
checks the epoch from the request; if it matches the existing epoch, the epoch
is bumped and the producer can safely continue. If it matches the previous
epoch, the the current epoch is returned without bumping. Otherwise, the
producer is fenced.
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*Summary of testing strategy (including rationale)
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### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> InitProducerId changes for KIP-360
> ----------------------------------
>
> Key: KAFKA-8710
> URL: https://issues.apache.org/jira/browse/KAFKA-8710
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 2.3.0
> Reporter: Bob Barrett
> Assignee: Bob Barrett
> Priority: Major
>
> As part of KIP-360, InitProducerId needs to accept two additional parameters,
> the current producerId and the current producerEpoch, and it needs to allow
> producers to safely re-initialize a producer ID and continue processing as
> long as no other producer with the same transactional ID has started up.
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