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https://issues.apache.org/jira/browse/FLINK-16125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17038796#comment-17038796
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Jiangjie Qin commented on FLINK-16125:
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Given this is an accidental unexpected change, I'd suggest to backport it to
1.10 as well.
> Make zookeeper.connect optional for Kafka connectors
> ----------------------------------------------------
>
> Key: FLINK-16125
> URL: https://issues.apache.org/jira/browse/FLINK-16125
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / Kafka
> Affects Versions: 1.10.0
> Reporter: Jiangjie Qin
> Assignee: Qingsheng Ren
> Priority: Major
>
> FLINK-14649 accidentally changed the connector option {{zookeeper.connect}}
> from optional to required for all the Kafka connector versions, while it is
> only required for 0.8.
> The fix would be make it optional again. This does mean that people who are
> using Kafka 0.8 might miss this option and get an error from Kafka code
> instead of Flink code, but given that Kafka 0.8 probably has a small user
> base now and users will still get an error. I think it is fine.
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