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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