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https://issues.apache.org/jira/browse/KAFKA-9656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17054299#comment-17054299
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ASF GitHub Bot commented on KAFKA-9656:
---------------------------------------
abbccdda commented on pull request #8253: KAFKA-9656: Return
COORDINATOR_NOT_AVAILABLE for older producer clients
URL: https://github.com/apache/kafka/pull/8253
Txn commit has a bug for lower versions where it would treat
`COORDINATOR_LOAD_IN_PROGRESS` as fatal. This PR fixes the handling of older
client to return
`COORDINATOR_NOT_AVAILABLE` so that it won't crash upon doing txn commit.
### 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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> TxnOffsetCommit should not return COORDINATOR_LOADING error for old request
> versions
> ------------------------------------------------------------------------------------
>
> Key: KAFKA-9656
> URL: https://issues.apache.org/jira/browse/KAFKA-9656
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Boyang Chen
> Priority: Major
>
> In KAFKA-7296, we fixed a bug which causes the producer to enter a fatal
> state when the COORDINATOR_LOADING_IN_PROGRESS error is received. The impact
> of this bug in streams was that the application would crash. Generally we
> want users to upgrade to a later client version, but in some cases, this
> takes a long time. I am suggesting here that we revert the behavior change on
> the broker for older versions of TxnOffsetCommit. For versions older than 2
> (which was introduced in 2.3), rather than returning
> COORDINATOR_LOADING_IN_PROGRESS, we can return COORDINATOR_NOT_AVAILABLE.
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