Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 0.23.3, 2.0.0-alpha
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Fix Version/s: 2.0.0-alpha, 0.23.7
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Component/s: mrv2
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Labels:None
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Hadoop Flags:Reviewed
Description
Hive get unexpected result when using MR2(When using MR1, always get expected result).
In MR2, when Total input paths to process == 1, CombinefileInputFormat.getSplits() returns 0 split.
The calling code in Hive, in Hadoop23Shims.java:
InputSplit[] splits = super.getSplits(job, numSplits);
this get splits.length == 0.
In MR1, everything goes fine, the calling code in Hive, in Hadoop20Shims.java:
CombineFileSplit[] splits = (CombineFileSplit[]) super.getSplits(job, numSplits);
this get splits.length == 1.