Grant Henke created IMPALA-10197:
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Summary: Add KUDU_REPLICA_SELECTION config and query option
Key: IMPALA-10197
URL: https://issues.apache.org/jira/browse/IMPALA-10197
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Affects Versions: Impala 4.0
Reporter: Grant Henke
Sometimes it is useful to target queries at the LEADER_ONLY instead of the
default CLOSEST_REPLICA. We should expose this option in Impala similar to the
way KUDU_READ_MODE is exposed:
https://impala.apache.org/docs/build/html/topics/impala_kudu_read_mode.html
Currently there is a test only flag, FLAGS_pick_only_leaders_for_tests, that
somewhat does this:
https://github.com/apache/impala/blob/da2999afd9ddc45d35141649d17db507e03ee9bf/be/src/exec/kudu-scanner.cc#L195-L198
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