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Posted to dev@hive.apache.org by "John Sherman (Jira)" <ji...@apache.org> on 2019/09/27 18:16:00 UTC

[jira] [Created] (HIVE-22252) Fix caught NullPointerExceptions generated during EXPLAIN

John Sherman created HIVE-22252:
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             Summary: Fix caught NullPointerExceptions generated during EXPLAIN
                 Key: HIVE-22252
                 URL: https://issues.apache.org/jira/browse/HIVE-22252
             Project: Hive
          Issue Type: Bug
            Reporter: John Sherman
            Assignee: John Sherman


While debugging an issue I noticed that during EXPLAIN the following methods throw a NullPointerException:
VectorColumnOutputMapping::finalize
AbstractOperatorDesc::getUserLevelStatistics
AbstractOperatorDesc::getColumnExprMapForExplain

The exceptions do end up getting caught but we should add null checks and gracefully to be less wasteful and to aid future debugging.

 



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