Mustafa İman created HIVE-24380:
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             Summary: NullScanTaskDispatcher should liststatus in parallel
                 Key: HIVE-24380
                 URL: https://issues.apache.org/jira/browse/HIVE-24380
             Project: Hive
          Issue Type: Sub-task
            Reporter: Mustafa İman
            Assignee: Mustafa İman


NullScanTaskDispatcher should query listStatus in parallel as it might take a 
long time to go through hundreds of partitions serially. This is big problem in 
cloud installations where directory listings are in object store like S3.



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