SPARK-2310. Support arbitrary Spark properties on the command line with ...

...spark-submit

The PR allows invocations like
  spark-submit --class org.MyClass --spark.shuffle.spill false myjar.jar

Author: Sandy Ryza <sandy@cloudera.com>

Closes #1253 from sryza/sandy-spark-2310 and squashes the following commits:

1dc9855 [Sandy Ryza] More doc and cleanup
00edfb9 [Sandy Ryza] Review comments
91b244a [Sandy Ryza] Change format to --conf PROP=VALUE
8fabe77 [Sandy Ryza] SPARK-2310. Support arbitrary Spark properties on the command line with spark-submit

1 files changed, 5 insertions, 3 deletions

diff --git a/docs/configuration.md b/docs/configuration.md
index 02af461267..cb0c65e2d2 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -42,13 +42,15 @@ val sc = new SparkContext(new SparkConf())
 
 Then, you can supply configuration values at runtime:
 {% highlight bash %}
-./bin/spark-submit --name "My fancy app" --master local[4] myApp.jar
+./bin/spark-submit --name "My app" --master local[4] --conf spark.shuffle.spill=false 
+  --conf "spark.executor.extraJavaOptions=-XX:+PrintGCDetails -XX:+PrintGCTimeStamps" myApp.jar 
 {% endhighlight %}
 
 The Spark shell and [`spark-submit`](cluster-overview.html#launching-applications-with-spark-submit)
 tool support two ways to load configurations dynamically. The first are command line options,
-such as `--master`, as shown above. Running `./bin/spark-submit --help` will show the entire list
-of options.
+such as `--master`, as shown above. `spark-submit` can accept any Spark property using the `--conf`
+flag, but uses special flags for properties that play a part in launching the Spark application.
+Running `./bin/spark-submit --help` will show the entire list of these options.
 
 `bin/spark-submit` will also read configuration options from `conf/spark-defaults.conf`, in which
 each line consists of a key and a value separated by whitespace. For example: