Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/8385#discussion_r40017383
--- Diff: docs/running-on-yarn.md ---
@@ -386,6 +403,6 @@ If you need a reference to the proper location to put
log files in the YARN so t
# Important notes
- Whether core requests are honored in scheduling decisions depends on
which scheduler is in use and how it is configured.
-- In `yarn-cluster` mode, the local directories used by the Spark
executors and the Spark driver will be the local directories configured for
YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies
`spark.local.dir`, it will be ignored. In `yarn-client` mode, the Spark
executors will use the local directories configured for YARN while the Spark
driver will use those defined in `spark.local.dir`. This is because the Spark
driver does not run on the YARN cluster in `yarn-client` mode, only the Spark
executors do.
+- In `yarn-cluster`, the local directories used by the Spark executors and
the Spark driver will be the local directories configured for YARN (Hadoop YARN
config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`,
it will be ignored. In `yarn-client` mode, the Spark executors will use the
local directories configured for YARN while the Spark driver will use those
defined in `spark.local.dir`. This is because the Spark driver does not run on
the YARN cluster in `yarn-client` mode, only the Spark executors do.
--- End diff --
I think we need to just call this "YARN cluster" and "YARN client" mode if
not referring to the arguments.
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