[jira] [Work started] (HBASE-26648) Improve fidelity of RegionLocator spans

["Nick Dimiduk (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-26648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-26648 started by Nick Dimiduk.
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> Improve fidelity of RegionLocator spans
> ---------------------------------------
>
>                 Key: HBASE-26648
>                 URL: https://issues.apache.org/jira/browse/HBASE-26648
>             Project: HBase
>          Issue Type: Sub-task
>          Components: tracing
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>            Priority: Major
>
> While backporting HBASE-26474 to branch-2, I realized that the nuance of tracing of region locator calls is lacking. In the current implementation, all calls to the region locator produce {{SpanKind.CLIENT}} spans. This is correct only for the code path where the client reaches out to a remote host to populate cache locations. This doesn't happen every time.
> Instead, the top-level span should be {{SpanKind.INTERNAL}} and only when a region location must be requested remotely should we create a child span with {{SpanKind.CLIENT}}.



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