[jira] [Updated] (SPARK-1994) Aggregates return incorrect results on first execution

["Michael Armbrust (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-1994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Armbrust updated SPARK-1994:
------------------------------------

    Summary: Aggregates return incorrect results on first execution  (was: Weird data corruption bug when running Spark SQL on data in HDFS)

> Aggregates return incorrect results on first execution
> ------------------------------------------------------
>
>                 Key: SPARK-1994
>                 URL: https://issues.apache.org/jira/browse/SPARK-1994
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.0.0
>            Reporter: Michael Armbrust
>            Assignee: Michael Armbrust
>            Priority: Blocker
>
> [~adav] has a full reproduction but he has found a case where the first run returns corrupted results, but the second case does not.  The same does not occur when reading from HDFS a second time...
> {code}
> sql("SELECT lang, COUNT(*) AS cnt FROM tweetTable GROUP BY lang ORDER BY cnt DESC").collect.foreach(println)
> [bg,16636]
> [16266,16266]
> [16223,16223]
> [16161,16161]
> [16047,16047]
> [lt,11405]
> [hu,11380]
> [el,10845]
> [da,10289]
> [fi,10261]
> [9897,9897]
> [9765,9765]
> [9751,9751]
> {code}



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