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https://issues.apache.org/jira/browse/FLINK-14634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968320#comment-16968320
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Chesnay Schepler commented on FLINK-14634:
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This part of the code evaluate the [scope
formats|https://ci.apache.org/projects/flink/flink-docs-master/monitoring/metrics.html#system-scope],
which are _always _separated by periods, regardless of what is configured as a
global delimiter.
The only case where this is problematic is if a constant part of a scope format
is supposed to contain a period; is that your goal?
> Metric Option of 'metrics.scope.delimiter' won't work probably.
> ---------------------------------------------------------------
>
> Key: FLINK-14634
> URL: https://issues.apache.org/jira/browse/FLINK-14634
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics
> Environment: Flink 1.9.0
> JDK 1.8
> Reporter: Eric Lee
> Priority: Major
> Attachments: 5506F8C7-ACCA-44E8-9BA9-D6023E02B633.png,
> C99D8A02-9C7A-4809-B151-93CE166E92DC.png
>
>
> In the `master` branch, when initializing the metricRegistryConfiguration,
> the configuration of `metrics.scope.delimiter` doesn't work probably because
> the user-defined delimiter is not used in the process of constructing
> `ScopeFormat` which uses the fixed character - `.` as the delimiter.
> 1. Attachment 1 shows that in the process of constructing `ScopeFormat`, `.`
> is used as the default delimiter rather than user-defined delimiter.
> 2. Attachment 2 illustrates that the wrong order of using user-defined
> delimiter.
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