Github user zentol commented on the pull request:
https://github.com/apache/flink/commit/7ad8375a89374bec80571029e9166f1336bdea8e#commitcomment-17693724
In flink-core/src/main/java/org/apache/flink/metrics/MetricRegistry.java:
In flink-core/src/main/java/org/apache/flink/metrics/MetricRegistry.java on
line 51:
note that trhis change, coupled with
651155775e74473f0adb3847b282bd4a8b636640, effectively disabled the entire
metric system.
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