GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/2508
[SPARK-3356] [DOCS] Document when RDD elements' ordering within partitions
is nondeterministic
As suggested by @mateiz , and because it came up on the mailing list again
last week, this attempts to document that ordering of elements is not
guaranteed across RDD evaluations in groupBy, zip, and partition-wise RDD
methods. Suggestions welcome about the wording, or other methods that need a
note.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-3356
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2508.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2508
----
commit fce943b3401135074ec943c56653fbb36657804c
Author: Sean Owen <[email protected]>
Date: 2014-09-23T12:57:47Z
Note that ordering of elements is not guaranteed across RDD evaluations in
groupBy, zip, and partition-wise RDD methods
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