Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2517#discussion_r80474552
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/MetricRegistry.java
---
@@ -219,9 +249,16 @@ public ScopeFormats getScopeFormats() {
public void register(Metric metric, String metricName, MetricGroup
group) {
--- End diff --
if you change the signature to (Metric, String, AbstractMetricGroup) you
would no longer need the cast on L257.
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