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https://issues.apache.org/jira/browse/KAFKA-1846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14268790#comment-14268790
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Gwen Shapira commented on KAFKA-1846:
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Being able to set the default replication factor to -1 with same semantics will
be very helpful too.
For same reasons - better out-of-the-box experience combined with extra safety
for those who rely on automated topic creation.
> Offset storage topic should not default to replication factor 1
> ---------------------------------------------------------------
>
> Key: KAFKA-1846
> URL: https://issues.apache.org/jira/browse/KAFKA-1846
> Project: Kafka
> Issue Type: Improvement
> Affects Versions: 0.8.2
> Reporter: Jay Kreps
> Labels: newbie
> Fix For: 0.8.3
>
>
> Currently the offset storage topic defaults to replication factor 1
> (offsets.topic.replication.factor). Presumably this is because we want to
> make the single-node case work well "out of the box". But this is one of
> those obscure settings most people won't really know about so most people
> won't realize they are running this without replication. It would be better
> to change the default in KafkaConfig to -1 and have this set the replication
> factor dynamically when that topic is created to be the min(3,total_nodes),
> if on the other hand the user sets some value here we would use that.
> In the absence of this I think many people will not realize what is happening
> until suddenly a broker dies and they can't commit offsets.
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