[GitHub] johnyangk opened a new pull request #52: [NEMO-122] Manage Task/Stage/Job states in one place

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johnyangk opened a new pull request #52: [NEMO-122] Manage Task/Stage/Job states in one place
URL: https://github.com/apache/incubator-nemo/pull/52
 
 
   JIRA: [NEMO-122: Manage Task/Stage/Job states in one place](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-122)
   
   **Major changes:**
   - State updates to Stage and Job are handled automatically inside the JobStateManager
   - Only the Task state updates are fed into the JobStateManager from the outside.
   
   **Minor changes to note:**
   - Removes redundant data structures in JobStateManager
   
   **Tests for the changes:**
   - Runtime tests have been modified to reflect the changes in the state management
   
   **Other comments:**
   - This PR tries to maintain the existing scheduler design as much as possible, and only change the state management part
   - More cleanups and reorganizations of the states will come in the follow-up PRs for issues like NEMO-55 (https://issues.apache.org/jira/projects/NEMO/issues/NEMO-50)
   
   resolves [NEMO-122](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-122)
   

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