Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2418
The string would be constant though, for all types of the same metric.
Users would select the metric via "domain", let's say
"flink.taskmanager.task.operator.numBytesOut". Then the user would use the tags
to filter which operator and taskmanager they would be interested in, for
example filer "hostname=worker7 & operatorname=GeoTagMapper".
Does that make sense?
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