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https://issues.apache.org/jira/browse/KAFKA-6180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson reassigned KAFKA-6180:
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Assignee: Charly Molter (was: Jason Gustafson)
> Add a Validator for NonNull configurations and remove redundant null checks
> on lists
> ------------------------------------------------------------------------------------
>
> Key: KAFKA-6180
> URL: https://issues.apache.org/jira/browse/KAFKA-6180
> Project: Kafka
> Issue Type: Improvement
> Components: config
> Affects Versions: 0.10.1.0, 0.10.1.1, 0.10.2.0, 0.10.2.1, 0.11.0.0, 1.0.0
> Reporter: Charly Molter
> Assignee: Charly Molter
> Priority: Trivial
>
> AbstractConfig.getList returns null if the property is unset and there's no
> default.
> This creates a lot of cases where we need to do null checks (and remember
> them).
> It's good practice to just return an empty list as usually code naturally
> handles empty lists.
> To do this we set the default on lists to be Collections.emptyList() and add
> a Validator to disallow null values.
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