KYLIN-3925 Add reduce step for FilterRecommendCuboidDataJob & UpdateO…

[kyotoYaho]

…ldCuboidShardJob to avoid generating small hdfs files

[asfgit]

Can one of the admins verify this patch?

[asfgit]

Can one of the admins verify this patch?

[coveralls]

Pull Request Test Coverage Report for Build 4344

• 0 of 99 (0.0%) changed or added relevant lines in 10 files are covered.
• 7 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.02%) to 27.851%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core-cube/src/main/java/org/apache/kylin/cube/common/RowKeySplitter.java	0	1	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/CuboidStatsReaderUtil.java	0	3	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/FilterRecommendCuboidDataMapper.java	0	3	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/UpdateOldCuboidShardJob.java	0	3	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/UpdateOldCuboidShardMapper.java	0	3	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/FilterRecommendCuboidDataJob.java	0	4	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/ConvergeCuboidDataUtil.java	0	15	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/ConvergeCuboidDataPartitioner.java	0	15	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/MapReduceUtil.java	0	18	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/ConvergeCuboidDataReducer.java	0	34	0.0%

Files with Coverage Reduction	New Missed Lines	%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/FilterRecommendCuboidDataMapper.java	1	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/MapReduceUtil.java	1	10.45%
core-job/src/main/java/org/apache/kylin/job/impl/threadpool/DefaultScheduler.java	2	80.23%
engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/UpdateOldCuboidShardMapper.java	3	0.0%

Totals
Change from base Build 4342:	-0.02%
Covered Lines:	22611
Relevant Lines:	81186

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💛 - Coveralls