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Posted to dev@hbase.apache.org by "Nick Dimiduk (Jira)" <ji...@apache.org> on 2022/01/06 18:21:00 UTC

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

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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