In MR2, when Total input paths to process == 1,
CombinefileInputFormat.getSplits() returns 0 split.
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Key: MAPREDUCE-3952
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3952
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Zhenxiao Luo
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.
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