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https://issues.apache.org/jira/browse/FLINK-26124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17491900#comment-17491900
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Chesnay Schepler commented on FLINK-26124:
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The JobManagerMG is never created in the JobMaster constructor but in the
DispatcherServices.
The JobMaster passes the JobManagerJobMG to the scheduler which registers
various metrics (i.e., _all_ job related metrics).
The field in the JobMaster only exists such that it can close the group.
> JobManagerMetricGroup is never actually used
> --------------------------------------------
>
> Key: FLINK-26124
> URL: https://issues.apache.org/jira/browse/FLINK-26124
> Project: Flink
> Issue Type: Technical Debt
> Components: Runtime / Coordination, Runtime / Metrics
> Affects Versions: 1.16.0
> Reporter: Matthias Pohl
> Priority: Minor
>
> The {{JobManagerMetricGroup}} instantiated in the {{JobMaster}}'s constructor
> is passed in the Scheduler where it is forwarded to the
> {{DefaultExecutionGraphFactory}} where it is never used. We might want to
> cleanup this code path.
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