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https://issues.apache.org/jira/browse/SPARK-19567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kay Ousterhout resolved SPARK-19567.
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       Resolution: Fixed
         Assignee: Eren Avsarogullari
    Fix Version/s: 2.2.0

> Support some Schedulable variables immutability and access
> ----------------------------------------------------------
>
>                 Key: SPARK-19567
>                 URL: https://issues.apache.org/jira/browse/SPARK-19567
>             Project: Spark
>          Issue Type: Improvement
>          Components: Scheduler
>    Affects Versions: 2.1.0
>            Reporter: Eren Avsarogullari
>            Assignee: Eren Avsarogullari
>            Priority: Minor
>             Fix For: 2.2.0
>
>
> Support some Schedulable variables immutability and access
> Some Schedulable variables need refactoring for immutability and access 
> modifiers as follows:
> - from vars to vals(if there is no requirement): This is important to support 
> immutability as much as possible. 
> Sample => Pool: weight, minShare, priority, name and 
> taskSetSchedulingAlgorithm.
> - access modifiers: Specially, vars access needs to be restricted from other 
> parts of codebase to prevent potential side effects. Sample: 
> Sample => TaskSetManager: tasksSuccessful, totalResultSize, calculatedTasks 
> etc...



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