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https://issues.apache.org/jira/browse/YARN-6621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantinos Karanasos reassigned YARN-6621:
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Assignee: Konstantinos Karanasos
> Validate Placement Constraints
> ------------------------------
>
> Key: YARN-6621
> URL: https://issues.apache.org/jira/browse/YARN-6621
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Konstantinos Karanasos
> Assignee: Konstantinos Karanasos
>
> This library will be used to validate placement constraints.
> It can serve multiple validation purposes:
> 1) Check if the placement constraint has a valid form (e.g., a cardinality
> constraint should not have an associated target expression, a DELAYED_OR
> compound expression should only appear in specific places in a constraint
> tree, etc.)
> 2) Check if the constraints given by a user are conflicting (e.g.,
> cardinality more than 5 in a host and less than 3 in a rack).
> 3) Check that the constraints are properly added in the Placement Constraint
> Manager.
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