Charles Connell created HBASE-29301:
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Summary: AggregateImplementation returns incomplete results to
AsyncAggregationClient when under high load
Key: HBASE-29301
URL: https://issues.apache.org/jira/browse/HBASE-29301
Project: HBase
Issue Type: Bug
Reporter: Charles Connell
Assignee: Charles Connell
My contribution in HBASE-28770 contains a bug that is exposed under certain
conditions. When using AsyncAggregationClient (not AggregationClient), the
client signals that it can accept partial results. On the server side, this
triggers AggregateImplementation to check quotas prior to each cell that it
scans, and return as soon as a throttle is violated, even if the result is not
complete. The client will sleep and then make a request for the next chunk of
results.
However, when AggregateImplementation violated a throttle before finding any
results at all, it returned a result to the client that said the results were
empty and complete, so the client should not request any more. Under high load,
this can happen and lead to the client receiving incomplete results that the
server says are complete.
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