Matei Zaharia created SPARK-3356: ------------------------------------ Summary: 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