Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2363#discussion_r75344832
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/groups/ComponentMetricGroup.java
---
@@ -33,19 +36,42 @@
* group could for example include the task attempt number (more fine
grained identification), or
* exclude it (for continuity of the namespace across failure and
recovery).
*/
-public abstract class ComponentMetricGroup extends AbstractMetricGroup {
+public abstract class ComponentMetricGroup<P extends AbstractMetricGroup>
extends AbstractMetricGroup<P> {
--- End diff --
Is this an internal component like the `JobMetricGroup`?
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