[jira] [Work logged] (GOBBLIN-963) Inconsistent TaskContext/TaskState created for TaskIFaceWrapper in GobblinMultiTaskAttempt

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GOBBLIN-963?focusedWorklogId=345721&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-345721 ]

ASF GitHub Bot logged work on GOBBLIN-963:
------------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/Nov/19 00:41
            Start Date: 19/Nov/19 00:41
    Worklog Time Spent: 10m 
      Work Description: enjoyear commented on pull request #2818: [GOBBLIN-963] Remove duplicated copies of TaskContext/TaskState when constructing TaskIFaceWrapper
URL: https://github.com/apache/incubator-gobblin/pull/2818
 
 
   Dear Gobblin maintainers,
   
   Please accept this PR. I understand that it will not be reviewed until I have checked off all the steps below!
   
   
   ### JIRA
   - [X] My PR addresses the following [Gobblin JIRA](https://issues.apache.org/jira/browse/GOBBLIN/) issues and references them in the PR title. For example, "[GOBBLIN-963] My Gobblin PR"
       - https://issues.apache.org/jira/browse/GOBBLIN-963
   
   
   ### Description
   - [X] Here are some details about my PR, including screenshots (if applicable):
   Currently in GobblinMultiTaskAttempt, when we call createTaskRunnable, we rely on a TaskFactory to create a task and return a wrapper for that task. However, when we create the wrapper, we initialized the TaskContext twice. 
   
   For the task creation
   For the task wrapper creation
   These two TaskContexts, which generate two copies of TaskState, will cause inconsistency in the following operation. The task state update within the task won't be reflected in TaskWrapper.
   
    
   
   Specifically, this is the buggy line of code
   ```java
   return new TaskIFaceWrapper(taskFactoryOpt.get().createTask(new TaskContext(workUnitState)),
    new TaskContext(workUnitState), countDownLatch, this.taskStateTracker);
   ```
   Ideally, we should create the TaskContext once, and reuse the same TaskContext.
   
   ### Tests
   - [X] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   
   
   ### Commits
   - [X] My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
       1. Subject is separated from body by a blank line
       2. Subject is limited to 50 characters
       3. Subject does not end with a period
       4. Subject uses the imperative mood ("add", not "adding")
       5. Body wraps at 72 characters
       6. Body explains "what" and "why", not "how"
   
   
 
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 345721)
    Remaining Estimate: 0h
            Time Spent: 10m

> Inconsistent TaskContext/TaskState created for TaskIFaceWrapper in GobblinMultiTaskAttempt
> ------------------------------------------------------------------------------------------
>
>                 Key: GOBBLIN-963
>                 URL: https://issues.apache.org/jira/browse/GOBBLIN-963
>             Project: Apache Gobblin
>          Issue Type: Bug
>            Reporter: Chen Guo
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently in GobblinMultiTaskAttempt, when we call createTaskRunnable, we rely on a TaskFactory to create a task and return a wrapper for that task. However, when we create the wrapper, we initialized the TaskContext twice. 
>  # For the task creation
>  # For the task wrapper creation
> These two TaskContexts, which generate two copies of TaskState, will cause inconsistency in the following operation. The task state update within the task won't be reflected in TaskWrapper.
>  
> Specifically, this is the buggy line of code
> {code:java}
> return new TaskIFaceWrapper(taskFactoryOpt.get().createTask(new TaskContext(workUnitState)),
>  new TaskContext(workUnitState), countDownLatch, this.taskStateTracker);
> {code}
> Ideally, we should create the TaskContext once, and reuse the same TaskContext.
>  
>  



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