make hive mapper initialize faster when having tons of input files
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Key: HIVE-2440
URL: https://issues.apache.org/jira/browse/HIVE-2440
Project: Hive
Issue Type: Improvement
Reporter: He Yongqiang
Assignee: He Yongqiang
when one hive job has tons of input files, a lot of mappers may fail because of
slow initialization.
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