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Posted to issues@spark.apache.org by "Guoqiang Li (JIRA)" <ji...@apache.org> on 2014/08/19 10:23:19 UTC
[jira] [Comment Edited] (SPARK-3098) In some cases, operation
groupByKey get a wrong results
[ https://issues.apache.org/jira/browse/SPARK-3098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14102012#comment-14102012 ]
Guoqiang Li edited comment on SPARK-3098 at 8/19/14 8:22 AM:
-------------------------------------------------------------
I found the error id is continuous. Seems there is something wrong with the {{zipWithIndex}}.
was (Author: gq):
I found the error id is continuous. Seems there is something wrong with the{{zipWithIndex}}.
> In some cases, operation groupByKey get a wrong results
> --------------------------------------------------------
>
> Key: SPARK-3098
> URL: https://issues.apache.org/jira/browse/SPARK-3098
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.0.1
> Reporter: Guoqiang Li
> Priority: Critical
>
> I do not know how to reproduce the bug.
> This is the case. When I was in operating 10 billion data by groupByKey. the results error:
> {noformat}
> (4696501, 370568)
> (4696501, 376672)
> (4696501, 374880)
> .....
> (4696502, 350264)
> (4696502, 358458)
> (4696502, 398502)
> ......
> {noformat}
> =>
> {noformat}
> (4696501,ArrayBuffer(350264, 358458, 398502 ........)), (4696502,ArrayBuffer(376621, ......))
> {noformat}
> code :
> {code}
> val dealOuts = clickPreferences(sc, dealOutPath, periodTime)
> val dealOrders = orderPreferences(sc, dealOrderPath, periodTime)
> val favorites = favoritePreferences(sc, favoritePath, periodTime)
> val allBehaviors = (dealOrders ++ favorites ++ dealOuts)
> val peferences= allBehaviors.groupByKey().map { ... }
> {code}
> spark-defaults.conf:
> {code}
> spark.default.parallelism 280
> {code}
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