Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2517#discussion_r80479173
--- 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) {
try {
if (reporters != null) {
- for (MetricReporter reporter : reporters) {
+ for (int i = 0; i < reporters.size(); i++) {
+ MetricReporter reporter =
reporters.get(i);
if (reporter != null) {
-
reporter.notifyOfAddedMetric(metric, metricName, group);
+ if (group instanceof
AbstractMetricGroup) {
+ FrontMetricGroup front
= groups.get(i);
--- End diff --
just realized that we can simplify this. We don't need multiple
FrontMetricGroups, but only 1 on which we also set the index before notify().
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