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https://issues.apache.org/jira/browse/KAFKA-1530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14056422#comment-14056422
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Oleg commented on KAFKA-1530:
-----------------------------
Another situation which happened in our production:
We have replication level 3. One out of 3 partition started lagging behind (due
to network connectivity problems, etc.). Then while upgrading/restarting Kafka
we restart the whole cluster. After upgrade Kafka starts electing leaders for
each partition. It's highly likely it may elect the lagging behind partition as
a leader. Which in result leads to truncating two other partitions. In this
case we loose data.
So we are seeking a means of restarting/upgrading Kafka without data loose.
> howto update continuously
> -------------------------
>
> Key: KAFKA-1530
> URL: https://issues.apache.org/jira/browse/KAFKA-1530
> Project: Kafka
> Issue Type: Wish
> Reporter: Stanislav Gilmulin
> Priority: Minor
> Labels: operating_manual, performance
>
> Hi,
>
> Could I ask you a question about the Kafka update procedure?
> Is there a way to update software, which doesn't require service interruption
> or lead to data losses?
> We can't stop message brokering during the update as we have a strict SLA.
>
> Best regards
> Stanislav Gilmulin
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