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https://issues.apache.org/jira/browse/SPARK-12179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060217#comment-15060217
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Davies Liu commented on SPARK-12179:
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Which version of Spark are you using?
> Spark SQL get different result with the same code
> -------------------------------------------------
>
> Key: SPARK-12179
> URL: https://issues.apache.org/jira/browse/SPARK-12179
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, SQL
> Affects Versions: 1.3.0, 1.3.1, 1.3.2, 1.4.0, 1.4.1, 1.4.2, 1.5.0, 1.5.1,
> 1.5.2, 1.5.3
> Environment: hadoop version: 2.5.0-cdh5.3.2
> spark version: 1.5.3
> run mode: yarn-client
> Reporter: Tao Li
> Priority: Critical
>
> I run the sql in yarn-client mode, but get different result each time.
> As you can see the example, I get the different shuffle write with the same
> shuffle read in two jobs with the same code.
> Some of my spark app runs well, but some always met this problem. And I met
> this problem on spark 1.3, 1.4 and 1.5 version.
> Can you give me some suggestions about the possible causes or how do I figure
> out the problem?
> 1. First Run
> Details for Stage 9 (Attempt 0)
> Total Time Across All Tasks: 5.8 min
> Shuffle Read: 24.4 MB / 205399
> Shuffle Write: 6.8 MB / 54934
> 2. Second Run
> Details for Stage 9 (Attempt 0)
> Total Time Across All Tasks: 5.6 min
> Shuffle Read: 24.4 MB / 205399
> Shuffle Write: 6.8 MB / 54905
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