[jira] [Created] (FLINK-7876) Register TaskManagerMetricGroup under ResourceID instead of InstanceID

[Shang Yuanchun (Jira)]

Till Rohrmann created FLINK-7876:
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             Summary: Register TaskManagerMetricGroup under ResourceID instead of InstanceID
                 Key: FLINK-7876
                 URL: https://issues.apache.org/jira/browse/FLINK-7876
             Project: Flink
          Issue Type: Improvement
          Components: Metrics
    Affects Versions: 1.4.0
            Reporter: Till Rohrmann
            Assignee: Till Rohrmann
            Priority: Minor


Currently, the {{TaskManager}} registers the {{TaskManagerMetricGroup}} under its {{InstanceID}} and thereby binding its metrics effectively to the lifetime of its registration with the {{JobManager}}. This has also implications how the REST handler retrieve the TaskManager metrics, namely by its {{InstanceID}}.

I would actually propose to register the {{TaskManagerMetricGroup}} under the {{TaskManager}}/{{TaskExecutor}} {{ResourceID}} which is valid over the whole lifetime of the {{TaskManager}}/{{TaskExecutor}}. That way we would also be able to query metrics independent of the connection status to the {{JobManager}}.



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