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## What changes were proposed in this pull request? This PR update to two: 1.adds the new unit tests. testing would be performed when there is no shuffle stage, shuffle will not generate the data file and the index files. 2.Modify the '[SPARK-4085] rerun map stage if reduce stage cannot find its local shuffle file' unit test, parallelize is 1 but not is 2, Check the index file and delete. ## How was this patch tested? The new unit test. Author: caoxuewen <cao.xuewen@zte.com.cn> Closes #17868 from heary-cao/ShuffleSuite. |
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