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https://issues.apache.org/jira/browse/KAFKA-6620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561476#comment-16561476
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ASF GitHub Bot commented on KAFKA-6620:
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dongjinleekr opened a new pull request #5434: KAFKA-6620: Documentation about
'exactly_once' doesn't mention 'transaction.state.log.min.isr'
URL: https://github.com/apache/kafka/pull/5434
Add note on `transaction.state.log.min.isr` property, which can cause a
problem when `transaction.state.log.replication.factor` is set to 1 for
development without changing it to 1.
- note:
[GlobalKTableEOSIntegrationTest.java](https://github.com/apache/kafka/blob/trunk/streams/src/test/java/org/apache/kafka/streams/integration/GlobalKTableEOSIntegrationTest.java#L66)
- note:
[GlobalThreadShutDownOrderTest.java](https://github.com/apache/kafka/blob/trunk/streams/src/test/java/org/apache/kafka/streams/integration/GlobalThreadShutDownOrderTest.java#L70)
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> Documentation about "exactly_once" doesn't mention
> "transaction.state.log.min.isr"
> -----------------------------------------------------------------------------------
>
> Key: KAFKA-6620
> URL: https://issues.apache.org/jira/browse/KAFKA-6620
> Project: Kafka
> Issue Type: Bug
> Components: documentation, streams
> Reporter: Daniel Qian
> Priority: Major
>
> Documentation about "processing.guarantee" says:
> {quote}The processing guarantee that should be used. Possible values are
> {{at_least_once}}(default) and {{exactly_once}}. Note that exactly-once
> processing requires a cluster of at least three brokers by default what is
> the recommended setting for production; *for development you can change this,
> by adjusting broker setting*
> `{color:#FF0000}*transaction.state.log.replication.factor*{color}`
> {quote}
> If one only set *transaction.state.log.replication.factor=1* but leave
> *transaction.state.log.min.isr* with default value (which is 2) the Streams
> Application will break.
> Hope you guys modify the doc, thanks.
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