[jira] [Commented] (YARN-9435) Add Opportunistic Scheduler metrics in ResourceManager.

["K G Bakthavachalam (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-9435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16839076#comment-16839076 ] 

K G Bakthavachalam commented on YARN-9435:
------------------------------------------

[~abmodi]
destroy is not handled in RM side ,so when we make RM active from standby manually metrics will never get registered because instance is always not null so the check becomes false always in the null check.

public static OpportunisticSchedulerMetrics getMetrics() {
    if(!isInitialized.get()){
      synchronized (OpportunisticSchedulerMetrics.class) {
        if(INSTANCE == null){
          INSTANCE = new OpportunisticSchedulerMetrics();
          registerMetrics();
          isInitialized.set(true);
        }
      }
    }
    return INSTANCE;
  }


> Add Opportunistic Scheduler metrics in ResourceManager.
> -------------------------------------------------------
>
>                 Key: YARN-9435
>                 URL: https://issues.apache.org/jira/browse/YARN-9435
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Abhishek Modi
>            Assignee: Abhishek Modi
>            Priority: Major
>             Fix For: 3.3.0
>
>         Attachments: YARN-9435.001.patch, YARN-9435.002.patch, YARN-9435.003.patch, YARN-9435.004.patch
>
>
> # Right now there are no metrics available for Opportunistic Scheduler at ResourceManager. As part of this jira, we will add metrics like number of allocated opportunistic containers, released opportunistic containers, node level allocations, rack level allocations etc. for Opportunistic Scheduler.



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