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https://issues.apache.org/jira/browse/SAMZA-1134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Navina Ramesh resolved SAMZA-1134.
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Resolution: Fixed
Issue resolved by pull request 81
[https://github.com/apache/samza/pull/81]
> simplify ZK barrier for version upgrade.
> ----------------------------------------
>
> Key: SAMZA-1134
> URL: https://issues.apache.org/jira/browse/SAMZA-1134
> Project: Samza
> Issue Type: Sub-task
> Reporter: Boris Shkolnik
> Assignee: Boris Shkolnik
> Fix For: 0.13.0
>
>
> Currently the barrier protects against overwriting the barrier_done value, by
> multiple attempts of reading and writing (while verifying the previously read
> data version), but since there is only one writer, this logic could be
> simplified to a single check and an exception.
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