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https://issues.apache.org/jira/browse/KAFKA-4667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836817#comment-15836817
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Emanuele Cesena commented on KAFKA-4667:
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I see - I think I was confused because we do have automatic topic creation
enabled, thank you for clarifying.
I agree with you, feel free to create the new ticket and close this one, or
rename this if you prefer.
I guess this can go into Kafka docs as a note under configuring Kafka for
consistency.
If you have auto topics creation enabled and Kafka configured for consistency,
make sure your producers have acks=all, or you risk to end up in corner case
situations (as per the other ticket that I mentioned).
> Connect (and Stream?) should create internal topics with availability or
> consistency properly set
> -------------------------------------------------------------------------------------------------
>
> Key: KAFKA-4667
> URL: https://issues.apache.org/jira/browse/KAFKA-4667
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Reporter: Emanuele Cesena
>
> I'm reporting this as an issue but in fact it requires more investigation
> (which unfortunately I'm not able to perform at this time).
> Repro steps:
> - configure Kafka for consistency, for example:
> default.replication.factor=3
> min.insync.replicas=2
> unclean.leader.election.enable=false
> - run Connect for the first time, which should create its internal topics
> I believe these topics are created with the broker's default, in particular:
> min.insync.replicas=2
> unclean.leader.election.enable=false
> but connect doesn't produce with acks=all, which in turn may cause the
> cluster to go in a bad state (see, e.g.,
> https://issues.apache.org/jira/browse/KAFKA-4666).
> Solution would be to force availability mode, i.e. force:
> unclean.leader.election.enable=true
> when creating the connect topics, or viceversa detect availability vs
> consistency mode and turn acks=all if needed.
> I assume the same happens with other kafka-based services such as streams.
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