[jira] [Created] (IGNITE-12767) MetricRegistryMBean is not hread safe

[Anton Vinogradov (Jira)]

Andrey N. Gura created IGNITE-12767:
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             Summary: MetricRegistryMBean is not hread safe
                 Key: IGNITE-12767
                 URL: https://issues.apache.org/jira/browse/IGNITE-12767
             Project: Ignite
          Issue Type: Improvement
            Reporter: Andrey N. Gura
             Fix For: 2.8.1


{{MetricRegistryMBean}} is not thread safe due to usage of {{histogramNames}} instance of {{HashMap}} class. Changing {{HashMap}} to {{ConcurrentHashMap}} will not help a lot (likely) because method {{MetricUtils.histogramBucketNames()}} uses just {{put}} method ({{putIfAbsent}} will help I believe).

{{OpenCensusExporterSpi}}  uses the same {{MetricUtils.histogramBucketNames()}} method. But it isn't issue for this exporter because it is single threaded.

Also {{MetricUtils.histogramBucketNames()}} method is responsible for histogram bucket's name representation. I believe that it is responsibility of metric exporter and this method should be removed from {{MetricUtils}}.



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