Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/2300#discussion_r75112856
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/groups/AbstractMetricGroup.java
---
@@ -54,13 +53,19 @@
* return Counters, Gauges, etc to the code, to prevent exceptions in the
monitored code.
* These metrics simply do not get reported any more, when created on a
closed group.
*/
-public abstract class AbstractMetricGroup implements MetricGroup {
+public abstract class AbstractMetricGroup<A extends AbstractMetricGroup>
implements MetricGroup {
--- End diff --
Curious, what is the reason to introduce a generically typed parent?
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