ndimiduk opened a new pull request #4106:
URL: https://github.com/apache/hbase/pull/4106
* on `AsyncTable`, both `scan` and `scanAll` methods should result in `SCAN`
table operations.
* the span of the `SCAN` table operation should have children representing
all the RPC calls
involved in servicing the scan.
* when a user provides custom implementation of
`AdvancedScanResultConsumer`, any spans emitted
from the callback methods should also be tied to the span that represents
the `SCAN` table
operation. This is easily done because these callbacks are executed on the
RPC thread.
* when a user provides a custom implementation of `ScanResultConsumer`, any
spans emitted from the
callback methods are tied to the context of user application code. We
could `link` them to the
`SCAN` table operation, except that we have no means of passing that span
along.
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