Chesnay Schepler created FLINK-21765:
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Summary: Remove implementation-specific MetricGroup parents
Key: FLINK-21765
URL: https://issues.apache.org/jira/browse/FLINK-21765
Project: Flink
Issue Type: Improvement
Components: Runtime / Metrics
Reporter: Chesnay Schepler
Assignee: Chesnay Schepler
Fix For: 1.13.0
MetricGroups currently form a bi-directly graph, usually with explicit
requirements that type the parent must have. For example, an OperatorMG has a
hard requirement that the parent is a TaskMG.
As a result they are quite inflexible, which particular shows in tests, as you
can't just create one metric group, but have to build an entire tree.
The end goal of this ticket is to remove AbstractMetricGroup#parent, and along
the way we'll decouple the various MG implementations from each other.
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