[jira] [Work logged] (GOBBLIN-904) Provide an option to reuse an existing Helix cluster on Gobblin-Yarn application launch

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

     [ https://issues.apache.org/jira/browse/GOBBLIN-904?focusedWorklogId=324829&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-324829 ]

ASF GitHub Bot logged work on GOBBLIN-904:
------------------------------------------

                Author: ASF GitHub Bot
            Created on: 08/Oct/19 03:10
            Start Date: 08/Oct/19 03:10
    Worklog Time Spent: 10m 
      Work Description: sv2000 commented on pull request #2757: GOBBLIN-904: Provide an option to reuse an existing Helix cluster on …
URL: https://github.com/apache/incubator-gobblin/pull/2757
 
 
   …Gobblin-Yarn application launch
   
   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-XXX] My Gobblin PR"
       - https://issues.apache.org/jira/browse/GOBBLIN-904
   
   
   ### Description
   - [x] Here are some details about my PR, including screenshots (if applicable):
   Currently, we recreate a Helix cluster structure everytime a Gobblin-on-Yarn application is launched. This is an expensive operation and somewhat flaky, often requiring multiple attempts. We need the ability to overwrite an existing Helix cluster to provide deterministic restarts. 
   
   
   ### Tests
   - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   Test deployment. 
   
   ### 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: 324829)
    Remaining Estimate: 0h
            Time Spent: 10m

> Provide an option to reuse an existing Helix cluster on Gobblin-Yarn application launch
> ---------------------------------------------------------------------------------------
>
>                 Key: GOBBLIN-904
>                 URL: https://issues.apache.org/jira/browse/GOBBLIN-904
>             Project: Apache Gobblin
>          Issue Type: Improvement
>          Components: gobblin-yarn
>    Affects Versions: 0.15.0
>            Reporter: Sudarshan Vasudevan
>            Assignee: Abhishek Tiwari
>            Priority: Major
>             Fix For: 0.15.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently, we recreate a Helix cluster structure everytime a Gobblin-on-Yarn application is launched. This is an expensive operation and somewhat flaky, often requiring multiple attempts. We need the ability to overwrite an existing Helix cluster to provide deterministic restarts. 



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