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  1. IMPALA
  2. IMPALA-10197

Add KUDU_REPLICA_SELECTION config and query option

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      Description

      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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              • Assignee:
                wzhou Wenzhe Zhou
                Reporter:
                granthenke Grant Henke
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