[jira] [Created] (BEAM-6022) Metrics of the same name and type are created multiple times

["Lukasz Gajowy (JIRA)" <ji...@apache.org>]

Lukasz Gajowy created BEAM-6022:
-----------------------------------

             Summary: Metrics of the same name and type are created multiple times
                 Key: BEAM-6022
                 URL: https://issues.apache.org/jira/browse/BEAM-6022
             Project: Beam
          Issue Type: Bug
          Components: sdk-java-core
            Reporter: Lukasz Gajowy
            Assignee: Kenneth Knowles


I noticed that when the below (or any other metric type) is called:
{code:java}
Metrics.counter("namespace", "name");{code}
metrics of the same name and type are created. So when such metrics are queried by name:
{code:java}
MetricQueryResults metrics =
    result
        .metrics()
        .queryMetrics(
            MetricsFilter.builder()
                .addNameFilter(MetricNameFilter.named(namespace, name))
                .build());
Iterable<MetricResult<Long>> counters = metrics.getCounters();{code}
there is ambiguity which MetricResult should be chosen. 

Should api users obtain one metric result here?

Should api users  merge the counter results if there are multiple returned?

I noticed that all of the results contain the same value (not sure if this is always the case). Should api users read only one of the multiple results to get correct metric.



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