[jira] [Created] (YARN-6621) Validator for Placement Constraints

["Konstantinos Karanasos (JIRA)" <ji...@apache.org>]

Konstantinos Karanasos created YARN-6621:
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             Summary: Validator for Placement Constraints
                 Key: YARN-6621
                 URL: https://issues.apache.org/jira/browse/YARN-6621
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: 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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