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https://issues.apache.org/jira/browse/IGNITE-12767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikolay Izhikov resolved IGNITE-12767.
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Resolution: Duplicate
> MetricRegistryMBean is not thread safe
> --------------------------------------
>
> Key: IGNITE-12767
> URL: https://issues.apache.org/jira/browse/IGNITE-12767
> Project: Ignite
> Issue Type: Bug
> Reporter: Andrey N. Gura
> Assignee: Nikolay Izhikov
> Priority: Major
> Labels: IEP-35
> 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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