zentol commented on a change in pull request #19263:
URL: https://github.com/apache/flink/pull/19263#discussion_r839376654
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/MetricRegistryImpl.java
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@@ -380,6 +382,12 @@ public void register(Metric metric, String metricName,
AbstractMetricGroup group
LOG.warn(
"Cannot register metric, because the MetricRegistry
has already been shut down.");
} else {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug(
+ "Registering metric {}.{}.",
+
group.getLogicalScope(CharacterFilter.NO_OP_FILTER),
+ metricName);
+ }
Review comment:
That's more or less a convention of the metric system where we (for
better or worse) try to reduce the impact if the system isn't used at all.
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