[jira] [Work logged] (GOBBLIN-1100) Set average fetch time in the KafkaExtractor even when metrics are disabled

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

     [ https://issues.apache.org/jira/browse/GOBBLIN-1100?focusedWorklogId=411132&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-411132 ]

ASF GitHub Bot logged work on GOBBLIN-1100:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 27/Mar/20 15:01
            Start Date: 27/Mar/20 15:01
    Worklog Time Spent: 10m 
      Work Description: htran1 commented on pull request #2941: [GOBBLIN-1100] Set average fetch time in the KafkaExtractor even when…
URL: https://github.com/apache/incubator-gobblin/pull/2941
 
 
   … metrics are disabled
   
   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-1100
   
   
   ### Description
   - [X] Here are some details about my PR, including screenshots (if applicable):
   The KafkaExtractor close method only calls the KafkaExtractorStatsTracker#emitTrackingEvents method when metrics instrumentation is enabled. This method calls KafkaExtractorStatsTracker#generateTagsForPartitions, which has the side effect of setting the average fetch time in the WorkUnitState. The average fetch time is required for the work unit packing to pack optimally.
   
   Add a call to KafkaExtractorStatsTracker#generateTagsForPartitions in KafkaExtractor#close when metrics instrumentation is disabled to restore the behavior that existed prior to the KafkaExtractorStatsTracker refactoring.
   
   ### Tests
   - [X] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   KafkaExtractorStatsTrackerTest
   
   ### 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: 411132)
    Remaining Estimate: 0h
            Time Spent: 10m

> Set average fetch time in the KafkaExtractor even when metrics are disabled
> ---------------------------------------------------------------------------
>
>                 Key: GOBBLIN-1100
>                 URL: https://issues.apache.org/jira/browse/GOBBLIN-1100
>             Project: Apache Gobblin
>          Issue Type: Bug
>            Reporter: Hung Tran
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> The KafkaExtractor close method only calls the KafkaExtractorStatsTracker#emitTrackingEvents method when metrics instrumentation is enabled. This method calls KafkaExtractorStatsTracker#generateTagsForPartitions, which has the side effect of setting the average fetch time in the WorkUnitState. The average fetch time is required for the work unit packing to pack optimally.
>  
> Add a call to KafkaExtractorStatsTracker#generateTagsForPartitions in KafkaExtractor#close when metrics instrumentation is disabled to restore the behavior that existed prior to the KafkaExtractorStatsTracker refactoring.
>  



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