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Posted to issues-all@impala.apache.org by "Pooja Nilangekar (JIRA)" <ji...@apache.org> on 2018/07/02 20:23:00 UTC

[jira] [Created] (IMPALA-7234) Non-deterministic majority format for a table with equal partition instances

Pooja Nilangekar created IMPALA-7234:
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             Summary: Non-deterministic majority format for a table with equal partition instances 
                 Key: IMPALA-7234
                 URL: https://issues.apache.org/jira/browse/IMPALA-7234
             Project: IMPALA
          Issue Type: Bug
            Reporter: Pooja Nilangekar
            Assignee: Pooja Nilangekar


The getMajorityFormat method of the FeCatalogUtils currently returns non-deterministic results when its argument is a list of partitions where there is no numerical majority in terms of the number of instances. The result is determined by the order in which the partitions are added to the HashMap. We need more deterministic results which also considers the memory requirement among different types of partitions. Ideally, this function should return the format with higher memory requirements in case of a tie. 



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