Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18711#discussion_r129633550
--- Diff: docs/configuration.md ---
@@ -1106,7 +1106,7 @@ Apart from these, the following properties are also
available, and may be useful
parameter allows an application to run multiple executors on the
same worker, provided that there are enough cores on that
worker. Otherwise, only one executor per application will run on
- each worker.
+ each worker in most cases.
--- End diff --
I think we should describe when we will break this assumption, either we
treat it a bug and try to fix that, or we explicitly document the behavior. I
don't think it makes much sense to just add some vague restriction such as "in
most cases".
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