Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/21088#discussion_r184542781
--- Diff: docs/configuration.md ---
@@ -328,6 +328,11 @@ Apart from these, the following properties are also
available, and may be useful
Note that it is illegal to set Spark properties or maximum heap size
(-Xmx) settings with this
option. Spark properties should be set using a SparkConf object or the
spark-defaults.conf file
used with the spark-submit script. Maximum heap size settings can be
set with spark.executor.memory.
+
+ The following symbols, if present will be interpolated: {{APP_ID}}
will be replaced by
+ Application Id and {{EXECUTOR_ID}} will be replaced by Executor Id.
For example, to enable
+ verbose gc logging to a file named for the Executor Id of the App in
/tmp, pass a 'value' of:
--- End diff --
nit: "executor ID", "app"
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