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Apache Spark commented on SPARK-3356: ------------------------------------- User 'srowen' has created a pull request for this issue: https://github.com/apache/spark/pull/2508 > Document when RDD elements' ordering within partitions is nondeterministic > -------------------------------------------------------------------------- > > Key: SPARK-3356 > URL: https://issues.apache.org/jira/browse/SPARK-3356 > Project: Spark > Issue Type: Documentation > Components: Documentation > Reporter: Matei Zaharia > > As reported in SPARK-3098 for example, for users using zipWithIndex, > zipWithUniqueId, etc, (and maybe even things like mapPartitions) it's > confusing that the order of elements in each partition after a shuffle > operation is nondeterministic (unless the operation was sortByKey). We should > explain this in the docs for the zip and partition-wise operations. > Another subtle issue is that the order of values for each key in groupBy / > join / etc can be nondeterministic -- we need to explain that too. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org