[jira] [Work logged] (GOBBLIN-1072) Being more conservative on releasing YARN containers

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

     [ https://issues.apache.org/jira/browse/GOBBLIN-1072?focusedWorklogId=398778&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-398778 ]

ASF GitHub Bot logged work on GOBBLIN-1072:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 06/Mar/20 00:12
            Start Date: 06/Mar/20 00:12
    Worklog Time Spent: 10m 
      Work Description: autumnust commented on pull request #2912: [GOBBLIN-1072] Add sliding window to protect AutoScaling from fluctuation of number of active Helix partitions
URL: https://github.com/apache/incubator-gobblin/pull/2912
 
 
   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
   - https://issues.apache.org/jira/browse/GOBBLIN-1072
   
   
   ### Description
   - An additional data structure `MaxValueEvictingQueue` to wrap multiple instances of `numTargetContainers` and behaved like an sliding-window where we could fetch the maxValue in the sliding-window in constant time. 
   - The advantage of this data structure is, if there's fluctuation in the number of active Helix partitions, a single fluctuation wont't impact the number of containers we requested in `YarnService`. 
   - The sliding-window's size is defined by the number of attempts that we query Helix for getting partitions number. 
   
   
   ### Tests
   - [ ] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   
   
   ### Commits
   - [ ] 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: 398778)
    Remaining Estimate: 0h
            Time Spent: 10m

> Being more conservative on releasing YARN containers
> ----------------------------------------------------
>
>                 Key: GOBBLIN-1072
>                 URL: https://issues.apache.org/jira/browse/GOBBLIN-1072
>             Project: Apache Gobblin
>          Issue Type: Improvement
>            Reporter: Lei Sun
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>




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