Nick Dimiduk created HBASE-26648:
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Summary: 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
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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